)]}' { "log": [ { "commit": "b2094ef840697bc8ca5d17a83b7e30fad5f1e9fa", "tree": "64e5f7253b6a85b6d5d36f95c0d3c67c1798918d", "parents": [ "424a6f6ef990b7e9f56f6627bfc6c46b493faeb4", "6681bc0deba495fad0d6fb349e40524abd1b1732" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 13:00:13 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 13:00:13 2012 -0700" }, "message": "Merge tag \u0027sound-3.4\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound\n\nPull updates of sound stuff from Takashi Iwai:\n \"Here is the first big update chunk of sound stuff for 3.4-rc1.\n\n In the common sound infrastructure, there are a few changes for\n dynamic PCM support (used in ASoC) and a few clean-ups. Majority of\n changes are found, as usual, in HD-audio and ASoC.\n\n Some highlights of HD-audio changes:\n\n - All the long-standing static quirk codes for Realtek codec were\n finally removed by fixing and extending the Realtek auto-parser.\n\n - The mute-LED control is standardized over all HD-audio codec\n drivers using the extended vmaster hook.\n\n - The vmaster slave mixer elements are initialized to 0dB as default\n so that the user won\u0027t be annoyed by the silent output after\n updates, e.g. due to the additions of new elements.\n\n - Other many fix-ups for the misc HD-audio devices.\n\n In the ASoC side, this is a very active release, including a quite a\n few framework enhancements. Some highlights:\n\n - Support for widgets not associated with a CODEC, an important part\n of the dynamic PCM framework.\n\n - A library factoring out the common code shared by dmaengine based\n DMA drivers contributed by Lars-Peter Clausen. This will save a\n lot of code and make it much easier to deploy enhancements to\n dmaengine.\n\n - Support for binary controls, used for providing runtime\n configuration of algorithm coefficients.\n\n - A new DAPM widget type for regulator supplies allowing drivers for\n devices that can power down unused supplies while active to do\n without any per-driver code.\n\n - DAPM widgets for DAIs, initially giving a speed boost for playback\n startup and shutdown and also the basis for CODEC\u003c-\u003eCODEC DAI link\n support.\n\n - Support for specifying the number of significant bits on audio\n interfaces, useful for allowing applications to know how much\n effort to put into generating data for a larger sample format.\n\n - Conversion of the FSI driver used on some SH processors to\n DMAEngine.\n\n - Conversion of EP93xx drivers to DMAEngine.\n\n - New CODEC drivers for Maxim MAX9768 and Wolfson Microelectronics\n WM2200.\n\n - Move audmux driver from arc/arm to sound/soc\n\n - McBSP move from arch/ to sound/ and updates\n\n Also, a few small updates and fixes for other drivers like au88x0,\n ymfpci, USB 6fire, USB usx2yaudio are included.\"\n\n* tag \u0027sound-3.4\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (446 commits)\n ASoC: wm8994: Provide VMID mode control and fix default sequence\n ASoC: wm8994: Add missing break in resume\n ASoC: wm_hubs: Don\u0027t actively manage LINEOUT_VMID_BUF\n ASoC: pxa-ssp: atomically set stream active masks\n ASoC: fsl: p1022ds: tell the WM8776 codec driver that it\u0027s the master\n ASoC: Samsung: Added to support mono recording\n ALSA: hda - Fix build with CONFIG_PM\u003dn\n ALSA: au88x0 - Avoid possible Oops at unbinding\n ALSA: usb-audio - Fix build error by consitification of rate list\n ASoC: core: Fix obscure leak of runtime array\n ALSA: pcm - Avoid GFP_ATOMIC in snd_pcm_link()\n ALSA: pcm: Constify the list in snd_pcm_hw_constraint_list\n ASoC: wm8996: Add 44.1kHz support\n ALSA: hda - Fix build of patch_sigmatel.c without CONFIG_SND_HDA_POWER_SAVE\n ASoC: mx27vis-aic32x4: Convert it to platform driver\n ALSA: hda - fix printing of high HDMI sample rates\n ALSA: ymfpci - Fix legacy registers on S3/S4 resume\n ALSA: control - Fixe a trailing white space error\n ALSA: hda - Add expose_enum_ctl flag to snd_hda_add_vmaster_hook()\n ALSA: hda - Add \"Mute-LED Mode\" enum control\n ...\n" }, { "commit": "424a6f6ef990b7e9f56f6627bfc6c46b493faeb4", "tree": "0028356ed8003495fbbe1f716f359e3c8ebc35b6", "parents": [ "1ab142d499294b844ecc81e8004db4ce029b0b61", "cd8df932d894f3128c884e3ae1b2b484540513db" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 12:55:29 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 12:55:29 2012 -0700" }, "message": "Merge tag \u0027scsi-misc\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6\n\nSCSI updates from James Bottomley:\n \"The update includes the usual assortment of driver updates (lpfc,\n qla2xxx, qla4xxx, bfa, bnx2fc, bnx2i, isci, fcoe, hpsa) plus a huge\n amount of infrastructure work in the SAS library and transport class\n as well as an iSCSI update. There\u0027s also a new SCSI based virtio\n driver.\"\n\n* tag \u0027scsi-misc\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (177 commits)\n [SCSI] qla4xxx: Update driver version to 5.02.00-k15\n [SCSI] qla4xxx: trivial cleanup\n [SCSI] qla4xxx: Fix sparse warning\n [SCSI] qla4xxx: Add support for multiple session per host.\n [SCSI] qla4xxx: Export CHAP index as sysfs attribute\n [SCSI] scsi_transport: Export CHAP index as sysfs attribute\n [SCSI] qla4xxx: Add support to display CHAP list and delete CHAP entry\n [SCSI] iscsi_transport: Add support to display CHAP list and delete CHAP entry\n [SCSI] pm8001: fix endian issue with code optimization.\n [SCSI] pm8001: Fix possible racing condition.\n [SCSI] pm8001: Fix bogus interrupt state flag issue.\n [SCSI] ipr: update PCI ID definitions for new adapters\n [SCSI] qla2xxx: handle default case in qla2x00_request_firmware()\n [SCSI] isci: improvements in driver unloading routine\n [SCSI] isci: improve phy event warnings\n [SCSI] isci: debug, provide state-enum-to-string conversions\n [SCSI] scsi_transport_sas: \u0027enable\u0027 phys on reset\n [SCSI] libsas: don\u0027t recover end devices attached to disabled phys\n [SCSI] libsas: fixup target_port_protocols for expanders that don\u0027t report sata\n [SCSI] libsas: set attached device type and target protocols for local phys\n ...\n" }, { "commit": "1ab142d499294b844ecc81e8004db4ce029b0b61", "tree": "9db85a456d0cba3de8b9bd6671b1b52fa939770c", "parents": [ "267d7b23dd62f6ec55e0fba777e456495c308fc7", "187e70a554e0f0717a65998bc9199945cbbd4692" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 12:38:04 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 12:38:04 2012 -0700" }, "message": "Merge branch \u0027for-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending\n\nPull SCSI target updates from Nicholas Bellinger:\n \"This contains the usual set of updates and bugfixes to target-core +\n existing fabric module code, along with a handful of the patches\n destined for v3.3 stable.\n\n It also contains the necessary target-core infrastructure pieces\n required to run using tcm_qla2xxx.ko WWPNs with the new Qlogic Fibre\n Channel fabric module currently queued in target-pending/for-next-merge,\n and coming for round 2.\n\n The highlights for this series include:\n\n - Add target_submit_tmr() helper function for fabric task management\n (andy)\n - Convert tcm_fc to use target_submit_tmr() (andy)\n - Replace target core various cmd flags with a transport state (hch)\n - Convert loopback to use workqueue submission (hch)\n - Convert target core to use array_zalloc for tpg_lun_list (joern)\n - Convert target core to use array_zalloc for device_list (joern)\n - Add target core support for TMR_ABORT_TASK (nab)\n - Add target core se_sess-\u003esess_kref + get/put helpers (nab)\n - Add target core se_node_acl-\u003eacl_kref for -\u003eacl_free_comp usage\n (nab)\n - Convert iscsi-target to use target_put_session + sess_kref (nab)\n - Fix tcm_fc fc_exch memory leak in ft_send_resp_status (nab)\n - Fix ib_srpt srpt_handle_cmd send_ioctx-\u003eioctx_kref leak on\n exception (nab)\n - Fix target core up handling of short INQUIRY buffers (roland)\n - Untangle target-core front-end and back-end meanings of max_sectors\n attribute (roland)\n - Set loopback residual field for SCSI commands (roland)\n - Fix target-core 16-bit target ports for SET TARGET PORT GROUPS\n emulation (roland)\n\n Thanks again to Andy, Christoph, Joern, Roland, and everyone who has\n contributed this round!\"\n\n* \u0027for-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (64 commits)\n ib_srpt: Fix srpt_handle_cmd send_ioctx-\u003eioctx_kref leak on exception\n loopback: Fix transport_generic_allocate_tasks error handling\n iscsi-target: remove improper externs\n iscsi-target: Remove unused variables in iscsi_target_parameters.c\n target: remove obvious warnings\n target: Use array_zalloc for device_list\n target: Use array_zalloc for tpg_lun_list\n target: Fix sense code for unsupported SERVICE ACTION IN\n target: Remove hack to make READ CAPACITY(10) lie if thin provisioning is enabled\n target: Bump core version to v4.1.0-rc2-ml + fabric versions\n tcm_fc: Fix fc_exch memory leak in ft_send_resp_status\n target: Drop unused legacy target_core_fabric_ops API callers\n iscsi-target: Convert to use target_put_session + sess_kref\n target: Convert se_node_acl-\u003eacl_group removal to use -\u003eacl_kref\n target: Add se_node_acl-\u003eacl_kref for -\u003eacl_free_comp usage\n target: Add se_node_acl-\u003eacl_free_comp for NodeACL release path\n target: Add se_sess-\u003esess_kref + get/put helpers\n target: Convert session_lock to irqsave\n target: Fix typo in drivers/target\n iscsi-target: Fix dynamic -\u003e explict NodeACL pointer reference\n ...\n" }, { "commit": "267d7b23dd62f6ec55e0fba777e456495c308fc7", "tree": "5c9fe0f07d5b87029b9c07eb003596c05d161a8f", "parents": [ "28f23d1f3b6a6078312b6e9585e583cc7326fe22", "ecb178bb2b154a40cfae9fa4c42e62ccfa81ac6b" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 12:29:50 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 12:29:50 2012 -0700" }, "message": "Merge tag \u0027md-3.4\u0027 of git://neil.brown.name/md\n\nPull md updates for 3.4 from Neil Brown:\n \"Mostly tidying up code in preparation for some bigger changes next\n time.\n\n A few bug fixes tagged for -stable.\n\n Main functionality change is that some RAID10 arrays can now grow to\n use extra space that may have been made available on the individual\n devices.\"\n\nFixed up trivial conflicts with the k[un]map_atomic() cleanups in\ndrivers/md/bitmap.c.\n\n* tag \u0027md-3.4\u0027 of git://neil.brown.name/md: (22 commits)\n md: Add judgement bb-\u003eunacked_exist in function md_ack_all_badblocks().\n md: fix clearing of the \u0027changed\u0027 flags for the bad blocks list.\n md/bitmap: discard CHUNK_BLOCK_SHIFT macro\n md/bitmap: remove unnecessary indirection when allocating.\n md/bitmap: remove some pointless locking.\n md/bitmap: change a \u0027goto\u0027 to a normal \u0027if\u0027 construct.\n md/bitmap: move printing of bitmap status to bitmap.c\n md/bitmap: remove some unused noise from bitmap.h\n md/raid10 - support resizing some RAID10 arrays.\n md/raid1: handle merge_bvec_fn in member devices.\n md/raid10: handle merge_bvec_fn in member devices.\n md: add proper merge_bvec handling to RAID0 and Linear.\n md: tidy up rdev_for_each usage.\n md/raid1,raid10: avoid deadlock during resync/recovery.\n md/bitmap: ensure to load bitmap when creating via sysfs.\n md: don\u0027t set md arrays to readonly on shutdown.\n md: allow re-add to failed arrays.\n md/raid5: use atomic_dec_return() instead of atomic_dec() and atomic_read().\n md: Use existed macros instead of numbers\n md/raid5: removed unused \u0027added_devices\u0027 variable.\n ...\n" }, { "commit": "28f23d1f3b6a6078312b6e9585e583cc7326fe22", "tree": "db366c75c2e2d12a2a2c3b7299c35ef7c72928a4", "parents": [ "23904815461ba223a8baf7490051597fa054299b", "c7b738351ba92f48b943ac59aff6b5b0f17f37c9" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:44:50 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:44:50 2012 -0700" }, "message": "Merge branch \u0027x86-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull x86 \"urgent\" leftovers from Ingo Molnar:\n \"Pending x86/urgent bits that were not high prio enough to warrant\n -rc-less v3.3-final inclusion.\"\n\n* \u0027x86-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n x86, efi: Fix pointer math issue in handle_ramdisks()\n x86/ioapic: Add register level checks to detect bogus io-apic entries\n x86, mce: Fix rcu splat in drain_mce_log_buffer()\n x86, memblock: Move mem_hole_size() to .init\n" }, { "commit": "23904815461ba223a8baf7490051597fa054299b", "tree": "2d52ce8ff18c4f731183d0b10048eb74489a3391", "parents": [ "754b9800779402924fffe456b49d557e15260cbf", "fa63030e9c79e37b4d4e63b39ffb09cfb7aa0fe4" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:42:36 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:43:22 2012 -0700" }, "message": "Merge branch \u0027x86-platform-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull x86 platform changes from Ingo Molnar.\n\nRemoves the Moorestown platform that nobody ever used.\n\n* \u0027x86-platform-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n x86/platform: Move APIC ID validity check into platform APIC code\n x86/olpc/xo15/sci: Enable lid close wakeup control\n x86/geode/net5501: Add platform driver for Soekris Engineering net5501\n x86/geode/alix2: Supplement driver to include GPIO button support\n x86/mid/powerbtn: Use MSIC read/write instead of ipc_scu\n x86/mid/thermal: Turn off thermistor\n x86/mid/thermal: Add msic_thermal alias\n x86/mid/thermal: Convert to use Intel MSIC API\n x86/mid/scu_ipc: Remove Moorestown support\n x86/mid: Kill off Moorestown\n x86/mrst: Add msic_thermal platform support\n x86/config: Select MSIC MFD driver on Intel Medfield platform\n x86/mid: Remove Intel Moorestown\n x86/mrst: Set ISA bus type for fake MP IRQs\n x86/ioapic: Use legacy_pic to set correct gsi-irq mapping\n" }, { "commit": "754b9800779402924fffe456b49d557e15260cbf", "tree": "0e0441eca766616fccd8fc37a3885397efc6063a", "parents": [ "35cb8d9e18c0bb33b90d7e574abadbe23b65427d", "ea281a9ebaba3287130dbe15bb0aad6f798bb06b" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:42:04 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:42:04 2012 -0700" }, "message": "Merge branch \u0027x86-mce-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull MCE changes from Ingo Molnar.\n\n* \u0027x86-mce-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n x86/mce: Fix return value of mce_chrdev_read() when erst is disabled\n x86/mce: Convert static array of pointers to per-cpu variables\n x86/mce: Replace hard coded hex constants with symbolic defines\n x86/mce: Recognise machine check bank signature for data path error\n x86/mce: Handle \"action required\" errors\n x86/mce: Add mechanism to safely save information in MCE handler\n x86/mce: Create helper function to save addr/misc when needed\n HWPOISON: Add code to handle \"action required\" errors.\n HWPOISON: Clean up memory_failure() vs. __memory_failure()\n" }, { "commit": "35cb8d9e18c0bb33b90d7e574abadbe23b65427d", "tree": "7bf2ce00ce1203a54ad5ace4f707a10f4fe0b14b", "parents": [ "02c502566ef505d0469fa27567f48766c1f5f7af", "1361b83a13d4d92e53fbb6c877528713e118b821" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:41:22 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:41:22 2012 -0700" }, "message": "Merge branch \u0027x86-fpu-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull x86/fpu changes from Ingo Molnar.\n\n* \u0027x86-fpu-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n i387: Split up \u003casm/i387.h\u003e into exported and internal interfaces\n i387: Uninline the generic FP helpers that we expose to kernel modules\n" }, { "commit": "02c502566ef505d0469fa27567f48766c1f5f7af", "tree": "dd29678eb5f15ddfe537418eb83ad2c54074c37b", "parents": [ "f06fc0c0de0b4f01dbad8ec5552e78192c7abbb8", "a51f4047758d2bcd099ea113b833ed380f4024ba" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:40:53 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:40:53 2012 -0700" }, "message": "Merge branch \u0027x86-build-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull x86/build changes from Ingo Molnar.\n\n* \u0027x86-build-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n x86, build: Fix portability issues when cross-building\n x86, tools: Remove unneeded header files from tools/build.c\n USB: ffs-test: Don\u0027t duplicate {get,put}_unaligned*() functions\n x86, efi: Fix endian issues and unaligned accesses\n x86, boot: Restrict CFLAGS for hostprogs\n x86, mkpiggy: Don\u0027t open code put_unaligned_le32()\n x86, relocs: Don\u0027t open code put_unaligned_le32()\n tools/include: Add byteshift headers for endian access\n" }, { "commit": "f06fc0c0de0b4f01dbad8ec5552e78192c7abbb8", "tree": "d31b0639244cbcaca2957b1c0c6c05686d4aeffa", "parents": [ "4c64616bb51b399886ded8f4f69bad4da2da1817", "1adbfa3511ee1c1118e16a9a0246870f12fef4e6" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:31:31 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:31:31 2012 -0700" }, "message": "Merge branch \u0027x86-eficross-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull x86/eficross (booting 32/64-bit kernel from 64/32-bit EFI) from Ingo Molnar\n\n* \u0027x86-eficross-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n x86, efi: Allow basic init with mixed 32/64-bit efi/kernel\n x86, efi: Add basic error handling\n x86, efi: Cleanup config table walking\n x86, efi: Convert printk to pr_*()\n x86, efi: Refactor efi_init() a bit\n" }, { "commit": "4c64616bb51b399886ded8f4f69bad4da2da1817", "tree": "341991585a9998e8c9bf20600f0d5cbf5a1746d2", "parents": [ "c5c7fb8fbd7cd228132b6e2a17a10f246ffc06ee", "943bc7e110f269f88dc92bbf249adbd384d35f1c" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:30:39 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:30:39 2012 -0700" }, "message": "Merge branch \u0027x86-debug-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull x86/debug changes from Ingo Molnar.\n\n* \u0027x86-debug-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n x86: Fix section warnings\n x86-64: Fix CFI data for common_interrupt()\n x86: Properly _init-annotate NMI selftest code\n x86/debug: Fix/improve the show_msr\u003d\u003ccpus\u003e debug print out\n" }, { "commit": "c5c7fb8fbd7cd228132b6e2a17a10f246ffc06ee", "tree": "3cd15a14d78b399c5dbeaf8beba7599615bc40bd", "parents": [ "1b674bf106f59e04e24b3825c2f08dcd9a5b7264", "140f190bc3a3b6f200548d204befd998eadd63fd", "35f1790e6c6a7e4cae57b616cf36444d27fa6b28", "513c4ec6e4759aa33c90af0658b82eb4d2027871", "42dfc43ee5999ac64284476ea0ac6c937587cf2b", "b0deca2e0270135f797e81bdb0743e50fd1dc58d" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:28:15 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:28:15 2012 -0700" }, "message": "Merge branches \u0027x86-cpu-for-linus\u0027, \u0027x86-boot-for-linus\u0027, \u0027x86-cpufeature-for-linus\u0027, \u0027x86-process-for-linus\u0027 and \u0027x86-uv-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull trivial x86 branches from Ingo Molnar: small one-liners to fix up\ndetails.\n\n* \u0027x86-cpu-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n x86: Remove some noise from boot log when starting cpus\n\n* \u0027x86-boot-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n x86, boot: Fix port argument to inl() function\n\n* \u0027x86-cpufeature-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n x86, cpufeature: Add CPU features from Intel document 319433-012A\n\n* \u0027x86-process-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n x86_64: Record stack pointer before task execution begins\n\n* \u0027x86-uv-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n x86/UV: Lower UV rtc clocksource rating\n" }, { "commit": "1b674bf106f59e04e24b3825c2f08dcd9a5b7264", "tree": "b90b52b692111f0be66eaf7efb040e35a6e763e3", "parents": [ "e17fdf5c6778ff77d93dd769910992e4073b9348", "cb8095bba6d24118135a5683a956f4f4fb5f17bb" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:23:57 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:23:57 2012 -0700" }, "message": "Merge branch \u0027x86-atomic-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull x86/atomic changes from Ingo Molnar.\n\n* \u0027x86-atomic-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n x86: atomic64 assembly improvements\n x86: Adjust asm constraints in atomic64 wrappers\n" }, { "commit": "e17fdf5c6778ff77d93dd769910992e4073b9348", "tree": "d1a7ca2b1faf4301b39300fbd82f9b91e605a77e", "parents": [ "95211279c5ad00a317c98221d7e4365e02f20836", "a240ada241dafe290e7532d1ddeb98fdf1419068" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:13:24 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:13:24 2012 -0700" }, "message": "Merge branch \u0027x86-asm-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull x86/asm changes from Ingo Molnar\n\n* \u0027x86-asm-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n x86: Include probe_roms.h in probe_roms.c\n x86/32: Print control and debug registers for kerenel context\n x86: Tighten dependencies of CPU_SUP_*_32\n x86/numa: Improve internode cache alignment\n x86: Fix the NMI nesting comments\n x86-64: Improve insn scheduling in SAVE_ARGS_IRQ\n x86-64: Fix CFI annotations for NMI nesting code\n bitops: Add missing parentheses to new get_order macro\n bitops: Optimise get_order()\n bitops: Adjust the comment on get_order() to describe the size\u003d\u003d0 case\n x86/spinlocks: Eliminate TICKET_MASK\n x86-64: Handle byte-wise tail copying in memcpy() without a loop\n x86-64: Fix memcpy() to support sizes of 4Gb and above\n x86-64: Fix memset() to support sizes of 4Gb and above\n x86-64: Slightly shorten copy_page()\n" }, { "commit": "95211279c5ad00a317c98221d7e4365e02f20836", "tree": "2ddc8625378d2915b8c96392f3cf6663b705ed55", "parents": [ "5375871d432ae9fc581014ac117b96aaee3cd0c7", "12724850e8064f64b6223d26d78c0597c742c65a" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:04:48 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 09:04:48 2012 -0700" }, "message": "Merge branch \u0027akpm\u0027 (Andrew\u0027s patch-bomb)\n\nMerge first batch of patches from Andrew Morton:\n \"A few misc things and all the MM queue\"\n\n* emailed from Andrew Morton \u003cakpm@linux-foundation.org\u003e: (92 commits)\n memcg: avoid THP split in task migration\n thp: add HPAGE_PMD_* definitions for !CONFIG_TRANSPARENT_HUGEPAGE\n memcg: clean up existing move charge code\n mm/memcontrol.c: remove unnecessary \u0027break\u0027 in mem_cgroup_read()\n mm/memcontrol.c: remove redundant BUG_ON() in mem_cgroup_usage_unregister_event()\n mm/memcontrol.c: s/stealed/stolen/\n memcg: fix performance of mem_cgroup_begin_update_page_stat()\n memcg: remove PCG_FILE_MAPPED\n memcg: use new logic for page stat accounting\n memcg: remove PCG_MOVE_LOCK flag from page_cgroup\n memcg: simplify move_account() check\n memcg: remove EXPORT_SYMBOL(mem_cgroup_update_page_stat)\n memcg: kill dead prev_priority stubs\n memcg: remove PCG_CACHE page_cgroup flag\n memcg: let css_get_next() rely upon rcu_read_lock()\n cgroup: revert ss_id_lock to spinlock\n idr: make idr_get_next() good for rcu_read_lock()\n memcg: remove unnecessary thp check in page stat accounting\n memcg: remove redundant returns\n memcg: enum lru_list lru\n ...\n" }, { "commit": "5375871d432ae9fc581014ac117b96aaee3cd0c7", "tree": "be98e8255b0f927fb920fb532a598b93fa140dbe", "parents": [ "b57cb7231b2ce52d3dda14a7b417ae125fb2eb97", "dfbc2d75c1bd47c3186fa91f1655ea2f3825b0ec" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 18:55:10 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 18:55:10 2012 -0700" }, "message": "Merge branch \u0027next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc\n\nPull powerpc merge from Benjamin Herrenschmidt:\n \"Here\u0027s the powerpc batch for this merge window. It is going to be a\n bit more nasty than usual as in touching things outside of\n arch/powerpc mostly due to the big iSeriesectomy :-) We finally got\n rid of the bugger (legacy iSeries support) which was a PITA to\n maintain and that nobody really used anymore.\n\n Here are some of the highlights:\n\n - Legacy iSeries is gone. Thanks Stephen ! There\u0027s still some bits\n and pieces remaining if you do a grep -ir series arch/powerpc but\n they are harmless and will be removed in the next few weeks\n hopefully.\n\n - The \u0027fadump\u0027 functionality (Firmware Assisted Dump) replaces the\n previous (equivalent) \"pHyp assisted dump\"... it\u0027s a rewrite of a\n mechanism to get the hypervisor to do crash dumps on pSeries, the\n new implementation hopefully being much more reliable. Thanks\n Mahesh Salgaonkar.\n\n - The \"EEH\" code (pSeries PCI error handling \u0026 recovery) got a big\n spring cleaning, motivated by the need to be able to implement a\n new backend for it on top of some new different type of firwmare.\n\n The work isn\u0027t complete yet, but a good chunk of the cleanups is\n there. Note that this adds a field to struct device_node which is\n not very nice and which Grant objects to. I will have a patch soon\n that moves that to a powerpc private data structure (hopefully\n before rc1) and we\u0027ll improve things further later on (hopefully\n getting rid of the need for that pointer completely). Thanks Gavin\n Shan.\n\n - I dug into our exception \u0026 interrupt handling code to improve the\n way we do lazy interrupt handling (and make it work properly with\n \"edge\" triggered interrupt sources), and while at it found \u0026 fixed\n a wagon of issues in those areas, including adding support for page\n fault retry \u0026 fatal signals on page faults.\n\n - Your usual random batch of small fixes \u0026 updates, including a bunch\n of new embedded boards, both Freescale and APM based ones, etc...\"\n\nI fixed up some conflicts with the generalized irq-domain changes from\nGrant Likely, hopefully correctly.\n\n* \u0027next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (141 commits)\n powerpc/ps3: Do not adjust the wrapper load address\n powerpc: Remove the rest of the legacy iSeries include files\n powerpc: Remove the remaining CONFIG_PPC_ISERIES pieces\n init: Remove CONFIG_PPC_ISERIES\n powerpc: Remove FW_FEATURE ISERIES from arch code\n tty/hvc_vio: FW_FEATURE_ISERIES is no longer selectable\n powerpc/spufs: Fix double unlocks\n powerpc/5200: convert mpc5200 to use of_platform_populate()\n powerpc/mpc5200: add options to mpc5200_defconfig\n powerpc/mpc52xx: add a4m072 board support\n powerpc/mpc5200: update mpc5200_defconfig to fit for charon board\n Documentation/powerpc/mpc52xx.txt: Checkpatch cleanup\n powerpc/44x: Add additional device support for APM821xx SoC and Bluestone board\n powerpc/44x: Add support PCI-E for APM821xx SoC and Bluestone board\n MAINTAINERS: Update PowerPC 4xx tree\n powerpc/44x: The bug fixed support for APM821xx SoC and Bluestone board\n powerpc: document the FSL MPIC message register binding\n powerpc: add support for MPIC message register API\n powerpc/fsl: Added aliased MSIIR register address to MSI node in dts\n powerpc/85xx: mpc8548cds - add 36-bit dts\n ...\n" }, { "commit": "b57cb7231b2ce52d3dda14a7b417ae125fb2eb97", "tree": "b6b3af0b2866f76fe5db80af678f4b3d54cc9b81", "parents": [ "ad12ab259d9131a53aa11c7c4561d97f7cc900df", "ae909ea4ad2431e085e6cc96446fbc1c1ae88498" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 18:17:51 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 18:17:51 2012 -0700" }, "message": "Merge branch \u0027for-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu\n\nPull m68knommu arch updates from Greg Ungerer:\n \"Includes a cleanup of the non-MMU linker script (it now almost\n exclusively uses the well defined linker script support macros and\n definitions). Some more merging of MMU and non-MMU common files\n (specifically the arch process.c, ptrace and time.c). And a big\n cleanup of the massively duplicated ColdFire device definition code.\n\n Overall we remove about 2000 lines of code, and end up with a single\n set of platform device definitions for the serial ports, ethernet\n ports and QSPI ports common in most ColdFire SoCs.\n\n I expect you will get a merge conflict on arch/m68k/kernel/process.c,\n in cpu_idle(). It should be relatively strait forward to fixup.\"\n\nAnd cpu_idle() conflict resolution was indeed trivial (merging the\nnommu/mmu versions of process.c trivially conflicting with the\nconversion to use the schedule_preempt_disabled() helper function)\n\n* \u0027for-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: (57 commits)\n m68knommu: factor more common ColdFire cpu reset code\n m68knommu: make 528x CPU reset register addressing consistent\n m68knommu: make 527x CPU reset register addressing consistent\n m68knommu: make 523x CPU reset register addressing consistent\n m68knommu: factor some common ColdFire cpu reset code\n m68knommu: move old ColdFire timers init from CPU init to timers code\n m68knommu: clean up init code in ColdFire 532x startup\n m68knommu: clean up init code in ColdFire 528x startup\n m68knommu: clean up init code in ColdFire 523x startup\n m68knommu: merge common ColdFire QSPI platform setup code\n m68knommu: make 532x QSPI platform addressing consistent\n m68knommu: make 528x QSPI platform addressing consistent\n m68knommu: make 527x QSPI platform addressing consistent\n m68knommu: make 5249 QSPI platform addressing consistent\n m68knommu: make 523x QSPI platform addressing consistent\n m68knommu: make 520x QSPI platform addressing consistent\n m68knommu: merge common ColdFire FEC platform setup code\n m68knommu: make 532x FEC platform addressing consistent\n m68knommu: make 528x FEC platform addressing consistent\n m68knommu: make 527x FEC platform addressing consistent\n ...\n" }, { "commit": "ad12ab259d9131a53aa11c7c4561d97f7cc900df", "tree": "457e99e4c4b1facf029a6a094428eaef73f5d261", "parents": [ "30d73f375238441d6dc31de0d90bc39f5bb0bfe5", "220cca2a4f5867db595135e0450381032eb54902" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 18:00:03 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 18:00:03 2012 -0700" }, "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw\n\nPull gfs2 changes from Steven Whitehouse.\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw:\n GFS2: Change truncate page allocation to be GFP_NOFS\n GFS2: call gfs2_write_alloc_required for each chunk\n GFS2: Clean up log flush header writing\n GFS2: Remove a __GFP_NOFAIL allocation\n GFS2: Flush pending glock work when evicting an inode\n GFS2: make sure rgrps are up to date in func gfs2_blk2rgrpd\n GFS2: Eliminate sd_rindex_mutex\n GFS2: Unlock rindex mutex on glock error\n GFS2: Make bd_cmp() static\n GFS2: Sort the ordered write list\n GFS2: FITRIM ioctl support\n GFS2: Move two functions from log.c to lops.c\n GFS2: glock statistics gathering\n" }, { "commit": "12724850e8064f64b6223d26d78c0597c742c65a", "tree": "f0b91eeae069fe92906db7ad9d0d8a8003f05db4", "parents": [ "d8c37c480678ebe09bc570f33e085e28049db035" ], "author": { "name": "Naoya Horiguchi", "email": "n-horiguchi@ah.jp.nec.com", "time": "Wed Mar 21 16:34:28 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:02 2012 -0700" }, "message": "memcg: avoid THP split in task migration\n\nCurrently we can\u0027t do task migration among memory cgroups without THP\nsplit, which means processes heavily using THP experience large overhead\nin task migration. This patch introduces the code for moving charge of\nTHP and makes THP more valuable.\n\nSigned-off-by: Naoya Horiguchi \u003cn-horiguchi@ah.jp.nec.com\u003e\nAcked-by: Hillf Danton \u003cdhillf@gmail.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d8c37c480678ebe09bc570f33e085e28049db035", "tree": "c8c53fde803f1a9655f44193c97db76dc4a90fe1", "parents": [ "8d32ff84401f1addb961c7af2c8d9baceb0ab9ba" ], "author": { "name": "Naoya Horiguchi", "email": "n-horiguchi@ah.jp.nec.com", "time": "Wed Mar 21 16:34:27 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:02 2012 -0700" }, "message": "thp: add HPAGE_PMD_* definitions for !CONFIG_TRANSPARENT_HUGEPAGE\n\nThese macros will be used in a later patch, where all usages are expected\nto be optimized away without #ifdef CONFIG_TRANSPARENT_HUGEPAGE. But to\ndetect unexpected usages, we convert the existing BUG() to BUILD_BUG().\n\n[akpm@linux-foundation.org: fix build in mm/pgtable-generic.c]\nSigned-off-by: Naoya Horiguchi \u003cn-horiguchi@ah.jp.nec.com\u003e\nAcked-by: Hillf Danton \u003cdhillf@gmail.com\u003e\nReviewed-by: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8d32ff84401f1addb961c7af2c8d9baceb0ab9ba", "tree": "bf62513b239dce072f0105c0b06ed694634a77d4", "parents": [ "a488428871265979bcf2c46298a04c1d5826e6cb" ], "author": { "name": "Naoya Horiguchi", "email": "n-horiguchi@ah.jp.nec.com", "time": "Wed Mar 21 16:34:27 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:02 2012 -0700" }, "message": "memcg: clean up existing move charge code\n\n- Replace lengthy function name is_target_pte_for_mc() with a shorter\n one in order to avoid ugly line breaks.\n\n- explicitly use MC_TARGET_* instead of simply using integers.\n\nSigned-off-by: Naoya Horiguchi \u003cn-horiguchi@ah.jp.nec.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nCc: Hillf Danton \u003cdhillf@gmail.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: Hillf Danton \u003cdhillf@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a488428871265979bcf2c46298a04c1d5826e6cb", "tree": "87126bade942bcff8f36e538c8f45605fd080fd0", "parents": [ "45f3e385b7a639c633d7a4b1e863c2d52b918258" ], "author": { "name": "Jeff Liu", "email": "jeff.liu@oracle.com", "time": "Wed Mar 21 16:34:27 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:02 2012 -0700" }, "message": "mm/memcontrol.c: remove unnecessary \u0027break\u0027 in mem_cgroup_read()\n\nSigned-off-by: Jie Liu \u003cjeff.liu@oracle.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "45f3e385b7a639c633d7a4b1e863c2d52b918258", "tree": "8f0c068aff36cc4f915899ed68d2e8686d75b069", "parents": [ "13fd1dd9db345f6b2babd1e80a1c929092eb4896" ], "author": { "name": "Anton Vorontsov", "email": "anton.vorontsov@linaro.org", "time": "Wed Mar 21 16:34:26 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:02 2012 -0700" }, "message": "mm/memcontrol.c: remove redundant BUG_ON() in mem_cgroup_usage_unregister_event()\n\nIn the following code:\n\n\tif (type \u003d\u003d _MEM)\n\t\tthresholds \u003d \u0026memcg-\u003ethresholds;\n\telse if (type \u003d\u003d _MEMSWAP)\n\t\tthresholds \u003d \u0026memcg-\u003ememsw_thresholds;\n\telse\n\t\tBUG();\n\n\tBUG_ON(!thresholds);\n\nThe BUG_ON() seems redundant.\n\nSigned-off-by: Anton Vorontsov \u003canton.vorontsov@linaro.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "13fd1dd9db345f6b2babd1e80a1c929092eb4896", "tree": "03d5fd77f06780bd5c164b82c6ba04b56a259b06", "parents": [ "4331f7d339ee0b54603344b9d13662a9c022540c" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Wed Mar 21 16:34:26 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:02 2012 -0700" }, "message": "mm/memcontrol.c: s/stealed/stolen/\n\nA grammatical fix.\n\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4331f7d339ee0b54603344b9d13662a9c022540c", "tree": "ea67ad19a4dff0f8bf7d335bb7ab148ecfb4d329", "parents": [ "2ff76f1193f8481f7e6c29304eea4006e8e51569" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Mar 21 16:34:26 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:02 2012 -0700" }, "message": "memcg: fix performance of mem_cgroup_begin_update_page_stat()\n\nmem_cgroup_begin_update_page_stat() should be very fast because it\u0027s\ncalled very frequently. Now, it needs to look up page_cgroup and its\nmemcg....this is slow.\n\nThis patch adds a global variable to check \"any memcg is moving or not\".\nWith this, the caller doesn\u0027t need to visit page_cgroup and memcg.\n\nHere is a test result. A test program makes page faults onto a file,\nMAP_SHARED and makes each page\u0027s page_mapcount(page) \u003e 1, and free the\nrange by madvise() and page fault again. This program causes 26214400\ntimes of page fault onto a file(size was 1G.) and shows shows the cost of\nmem_cgroup_begin_update_page_stat().\n\nBefore this patch for mem_cgroup_begin_update_page_stat()\n\n [kamezawa@bluextal test]$ time ./mmap 1G\n\n real 0m21.765s\n user 0m5.999s\n sys 0m15.434s\n\n 27.46% mmap mmap [.] reader\n 21.15% mmap [kernel.kallsyms] [k] page_fault\n 9.17% mmap [kernel.kallsyms] [k] filemap_fault\n 2.96% mmap [kernel.kallsyms] [k] __do_fault\n 2.83% mmap [kernel.kallsyms] [k] __mem_cgroup_begin_update_page_stat\n\nAfter this patch\n\n [root@bluextal test]# time ./mmap 1G\n\n real 0m21.373s\n user 0m6.113s\n sys 0m15.016s\n\nIn usual path, calls to __mem_cgroup_begin_update_page_stat() goes away.\n\nNote: we may be able to remove this optimization in future if\n we can get pointer to memcg directly from struct page.\n\n[akpm@linux-foundation.org: don\u0027t return a void]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Greg Thelen \u003cgthelen@google.com\u003e\nAcked-by: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Ying Han \u003cyinghan@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2ff76f1193f8481f7e6c29304eea4006e8e51569", "tree": "a263678dc298e29a0c54bb2e6f98bb1d5ee19751", "parents": [ "89c06bd52fb9ffceddf84f7309d2e8c9f1666216" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Mar 21 16:34:25 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:01 2012 -0700" }, "message": "memcg: remove PCG_FILE_MAPPED\n\nWith the new lock scheme for updating memcg\u0027s page stat, we don\u0027t need a\nflag PCG_FILE_MAPPED which was duplicated information of page_mapped().\n\n[hughd@google.com: cosmetic fix]\n[hughd@google.com: add comment to MEM_CGROUP_CHARGE_TYPE_MAPPED case in __mem_cgroup_uncharge_common()]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Greg Thelen \u003cgthelen@google.com\u003e\nAcked-by: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Ying Han \u003cyinghan@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "89c06bd52fb9ffceddf84f7309d2e8c9f1666216", "tree": "43ec3d97a89988bc143bed5796bcd7bef64212dc", "parents": [ "312734c04e2fecc58429aec98194e4ff12d8f7d6" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Mar 21 16:34:25 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:01 2012 -0700" }, "message": "memcg: use new logic for page stat accounting\n\nNow, page-stat-per-memcg is recorded into per page_cgroup flag by\nduplicating page\u0027s status into the flag. The reason is that memcg has a\nfeature to move a page from a group to another group and we have race\nbetween \"move\" and \"page stat accounting\",\n\nUnder current logic, assume CPU-A and CPU-B. CPU-A does \"move\" and CPU-B\ndoes \"page stat accounting\".\n\nWhen CPU-A goes 1st,\n\n CPU-A CPU-B\n update \"struct page\" info.\n move_lock_mem_cgroup(memcg)\n see pc-\u003eflags\n copy page stat to new group\n overwrite pc-\u003emem_cgroup.\n move_unlock_mem_cgroup(memcg)\n move_lock_mem_cgroup(mem)\n set pc-\u003eflags\n update page stat accounting\n move_unlock_mem_cgroup(mem)\n\nstat accounting is guarded by move_lock_mem_cgroup() and \"move\" logic\n(CPU-A) doesn\u0027t see changes in \"struct page\" information.\n\nBut it\u0027s costly to have the same information both in \u0027struct page\u0027 and\n\u0027struct page_cgroup\u0027. And, there is a potential problem.\n\nFor example, assume we have PG_dirty accounting in memcg.\nPG_..is a flag for struct page.\nPCG_ is a flag for struct page_cgroup.\n(This is just an example. The same problem can be found in any\n kind of page stat accounting.)\n\n\t CPU-A CPU-B\n TestSet PG_dirty\n (delay) TestClear PG_dirty\n if (TestClear(PCG_dirty))\n memcg-\u003enr_dirty--\n if (TestSet(PCG_dirty))\n memcg-\u003enr_dirty++\n\nHere, memcg-\u003enr_dirty \u003d +1, this is wrong. This race was reported by Greg\nThelen \u003cgthelen@google.com\u003e. Now, only FILE_MAPPED is supported but\nfortunately, it\u0027s serialized by page table lock and this is not real bug,\n_now_,\n\nIf this potential problem is caused by having duplicated information in\nstruct page and struct page_cgroup, we may be able to fix this by using\noriginal \u0027struct page\u0027 information. But we\u0027ll have a problem in \"move\naccount\"\n\nAssume we use only PG_dirty.\n\n CPU-A CPU-B\n TestSet PG_dirty\n (delay) move_lock_mem_cgroup()\n if (PageDirty(page))\n new_memcg-\u003enr_dirty++\n pc-\u003emem_cgroup \u003d new_memcg;\n move_unlock_mem_cgroup()\n move_lock_mem_cgroup()\n memcg \u003d pc-\u003emem_cgroup\n new_memcg-\u003enr_dirty++\n\naccounting information may be double-counted. This was original reason to\nhave PCG_xxx flags but it seems PCG_xxx has another problem.\n\nI think we need a bigger lock as\n\n move_lock_mem_cgroup(page)\n TestSetPageDirty(page)\n update page stats (without any checks)\n move_unlock_mem_cgroup(page)\n\nThis fixes both of problems and we don\u0027t have to duplicate page flag into\npage_cgroup. Please note: move_lock_mem_cgroup() is held only when there\nare possibility of \"account move\" under the system. So, in most path,\nstatus update will go without atomic locks.\n\nThis patch introduces mem_cgroup_begin_update_page_stat() and\nmem_cgroup_end_update_page_stat() both should be called at modifying\n\u0027struct page\u0027 information if memcg takes care of it. as\n\n mem_cgroup_begin_update_page_stat()\n modify page information\n mem_cgroup_update_page_stat()\n \u003d\u003e never check any \u0027struct page\u0027 info, just update counters.\n mem_cgroup_end_update_page_stat().\n\nThis patch is slow because we need to call begin_update_page_stat()/\nend_update_page_stat() regardless of accounted will be changed or not. A\nfollowing patch adds an easy optimization and reduces the cost.\n\n[akpm@linux-foundation.org: s/lock/locked/]\n[hughd@google.com: fix deadlock by avoiding stat lock when anon]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Greg Thelen \u003cgthelen@google.com\u003e\nAcked-by: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Ying Han \u003cyinghan@google.com\u003e\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "312734c04e2fecc58429aec98194e4ff12d8f7d6", "tree": "c1195cd46733b6a3909c11b2b5abcdee4412b99b", "parents": [ "619d094b5872a5af153f1af77a8b7f7326faf0d0" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Mar 21 16:34:24 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:01 2012 -0700" }, "message": "memcg: remove PCG_MOVE_LOCK flag from page_cgroup\n\nPCG_MOVE_LOCK is used for bit spinlock to avoid race between overwriting\npc-\u003emem_cgroup and page statistics accounting per memcg. This lock helps\nto avoid the race but the race is very rare because moving tasks between\ncgroup is not a usual job. So, it seems using 1bit per page is too\ncostly.\n\nThis patch changes this lock as per-memcg spinlock and removes\nPCG_MOVE_LOCK.\n\nIf smaller lock is required, we\u0027ll be able to add some hashes but I\u0027d like\nto start from this.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Greg Thelen \u003cgthelen@google.com\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Ying Han \u003cyinghan@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "619d094b5872a5af153f1af77a8b7f7326faf0d0", "tree": "4de9ff8640d8cee092800cd722e621ea2db63640", "parents": [ "9e3357907c84517d9e07bc0b19265807f0264b43" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Mar 21 16:34:23 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:01 2012 -0700" }, "message": "memcg: simplify move_account() check\n\nIn memcg, for avoiding take-lock-irq-off at accessing page_cgroup, a\nlogic, flag + rcu_read_lock(), is used. This works as following\n\n CPU-A CPU-B\n rcu_read_lock()\n set flag\n if(flag is set)\n take heavy lock\n do job.\n synchronize_rcu() rcu_read_unlock()\n take heavy lock.\n\nIn recent discussion, it\u0027s argued that using per-cpu value for this flag\njust complicates the code because \u0027set flag\u0027 is very rare.\n\nThis patch changes \u0027flag\u0027 implementation from percpu to atomic_t. This\nwill be much simpler.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Greg Thelen \u003cgthelen@google.com\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Ying Han \u003cyinghan@google.com\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\nAcked-by: Johannes Weiner \u003channes@cmpxchg.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9e3357907c84517d9e07bc0b19265807f0264b43", "tree": "3ce1602eefd0c1f006c23170da16545478dc5404", "parents": [ "a710920caedfcf56543136bfea300a6c593f9838" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Mar 21 16:34:23 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:01 2012 -0700" }, "message": "memcg: remove EXPORT_SYMBOL(mem_cgroup_update_page_stat)\n\nAs described in the log, I guess EXPORT was for preparing dirty\naccounting. But _now_, we don\u0027t need to export this. Remove this for\nnow.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nReviewed-by: Greg Thelen \u003cgthelen@google.com\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Ying Han \u003cyinghan@google.com\u003e\nAcked-by: Johannes Weiner \u003channes@cmpxchg.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a710920caedfcf56543136bfea300a6c593f9838", "tree": "47546c076b45b8b6b82c4f6b47906a480a00b24f", "parents": [ "b24028572fb69e9dd6de8c359eba2b2c66baa889" ], "author": { "name": "Konstantin Khlebnikov", "email": "khlebnikov@openvz.org", "time": "Wed Mar 21 16:34:22 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:01 2012 -0700" }, "message": "memcg: kill dead prev_priority stubs\n\nThis code was removed in 25edde033291 (\"vmscan: kill prev_priority\ncompletely\")\n\nSigned-off-by: Konstantin Khlebnikov \u003ckhlebnikov@openvz.org\u003e\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b24028572fb69e9dd6de8c359eba2b2c66baa889", "tree": "563594eba40e5fd0b61c36c09705f128a8dfbe40", "parents": [ "ca464d69b19120a826aa2534de2511a6f542edf5" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Mar 21 16:34:22 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:01 2012 -0700" }, "message": "memcg: remove PCG_CACHE page_cgroup flag\n\nWe record \u0027the page is cache\u0027 with the PCG_CACHE bit in page_cgroup.\nHere, \"CACHE\" means anonymous user pages (and SwapCache). This doesn\u0027t\ninclude shmem.\n\nConsidering callers, at charge/uncharge, the caller should know what the\npage is and we don\u0027t need to record it by using one bit per page.\n\nThis patch removes PCG_CACHE bit and make callers of\nmem_cgroup_charge_statistics() to specify what the page is.\n\nAbout page migration: Mapping of the used page is not touched during migra\ntion (see page_remove_rmap) so we can rely on it and push the correct\ncharge type down to __mem_cgroup_uncharge_common from end_migration for\nunused page. The force flag was misleading was abused for skipping the\nneedless page_mapped() / PageCgroupMigration() check, as we know the\nunused page is no longer mapped and cleared the migration flag just a few\nlines up. But doing the checks is no biggie and it\u0027s not worth adding\nanother flag just to skip them.\n\n[akpm@linux-foundation.org: checkpatch fixes]\n[hughd@google.com: fix PageAnon uncharging]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Michal Hocko \u003cmhocko@suse.cz\u003e\nAcked-by: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Hugh Dickins \u003chughd@google.com\u003e\nCc: Ying Han \u003cyinghan@google.com\u003e\nAcked-by: Johannes Weiner \u003channes@cmpxchg.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ca464d69b19120a826aa2534de2511a6f542edf5", "tree": "092582419a30825b8483640856483ea8ee56cf81", "parents": [ "42aee6c495e07dba7410b863a360db6bb9ec6d66" ], "author": { "name": "Hugh Dickins", "email": "hughd@google.com", "time": "Wed Mar 21 16:34:21 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:01 2012 -0700" }, "message": "memcg: let css_get_next() rely upon rcu_read_lock()\n\nRemove lock and unlock around css_get_next()\u0027s call to idr_get_next().\nmemcg iterators (only users of css_get_next) already did rcu_read_lock(),\nand its comment demands that; but add a WARN_ON_ONCE to make sure of it.\n\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Eric Dumazet \u003ceric.dumazet@gmail.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "42aee6c495e07dba7410b863a360db6bb9ec6d66", "tree": "d014b2b5c7aa9d1a1f13686fa06699f9f734ee1c", "parents": [ "9f7de8275b46d9d11b1505adbfe6c2bb48df4741" ], "author": { "name": "Hugh Dickins", "email": "hughd@google.com", "time": "Wed Mar 21 16:34:21 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:01 2012 -0700" }, "message": "cgroup: revert ss_id_lock to spinlock\n\nCommit c1e2ee2dc436 (\"memcg: replace ss-\u003eid_lock with a rwlock\") has now\nbeen seen to cause the unfair behavior we should have expected from\nconverting a spinlock to an rwlock: softlockup in cgroup_mkdir(), whose\nget_new_cssid() is waiting for the wlock, while there are 19 tasks using\nthe rlock in css_get_next() to get on with their memcg workload (in an\nartificial test, admittedly). Yet lib/idr.c was made suitable for RCU\nway back: revert that commit, restoring ss-\u003eid_lock to a spinlock.\n\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Eric Dumazet \u003ceric.dumazet@gmail.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9f7de8275b46d9d11b1505adbfe6c2bb48df4741", "tree": "7495111b20585e6e4da20d1b46b7a3747903ce2a", "parents": [ "0e79dedde951e981612ed4e6d74873d61d2a113b" ], "author": { "name": "Hugh Dickins", "email": "hughd@google.com", "time": "Wed Mar 21 16:34:20 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:01 2012 -0700" }, "message": "idr: make idr_get_next() good for rcu_read_lock()\n\nMake one small adjustment to idr_get_next(): take the height from the top\nlayer (stable under RCU) instead of from the root (unprotected by RCU), as\nidr_find() does: so that it can be used with RCU locking. Copied comment\non RCU locking from idr_find().\n\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Eric Dumazet \u003ceric.dumazet@gmail.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "0e79dedde951e981612ed4e6d74873d61d2a113b", "tree": "eb759b4516068a39bc30a2e1758f0743a9c68762", "parents": [ "1f2b71f41ee81735c25ef326da9a0610d640abc2" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Mar 21 16:34:20 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:01 2012 -0700" }, "message": "memcg: remove unnecessary thp check in page stat accounting\n\nCommit e94c8a9cbce1 (\"memcg: make mem_cgroup_split_huge_fixup() more\nefficient\") removed move_lock_page_cgroup(). So we do not have to check\nPageTransHuge in mem_cgroup_update_page_stat() and fallback into the\nlocked accounting because both move_account() and thp split are done\nwith compound_lock so they cannot race.\n\nThe race between update vs. move is protected by mem_cgroup_stealed.\n\nPageTransHuge pages shouldn\u0027t appear in this code path currently because\nwe are tracking only file pages at the moment but later we are planning\nto track also other pages (e.g. mlocked ones).\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nReviewed-by: Acked-by: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: Ying Han\u003cyinghan@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1f2b71f41ee81735c25ef326da9a0610d640abc2", "tree": "07d2c696698da7bf6446b11158e0291c73bbae6b", "parents": [ "f156ab9333c7810f8c4b1a0413142f52534b2df1" ], "author": { "name": "Hugh Dickins", "email": "hughd@google.com", "time": "Wed Mar 21 16:34:19 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:00 2012 -0700" }, "message": "memcg: remove redundant returns\n\nRemove redundant returns from ends of functions, and one blank line.\n\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Kirill A. Shutemov \u003ckirill@shutemov.name\u003e\nAcked-by: Michal Hocko \u003cmhocko@suse.cz\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f156ab9333c7810f8c4b1a0413142f52534b2df1", "tree": "c456db15734c575223be69c57328e140cc4b489f", "parents": [ "1eb4927251a4e5ab152e64afb29453547365fde8" ], "author": { "name": "Hugh Dickins", "email": "hughd@google.com", "time": "Wed Mar 21 16:34:19 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:00 2012 -0700" }, "message": "memcg: enum lru_list lru\n\nMostly we use \"enum lru_list lru\": change those few \"l\"s to \"lru\"s.\n\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Kirill A. Shutemov \u003ckirill@shutemov.name\u003e\nAcked-by: Michal Hocko \u003cmhocko@suse.cz\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1eb4927251a4e5ab152e64afb29453547365fde8", "tree": "e2b51066c91c8a704251dfdfab6b94471206a00f", "parents": [ "d79154bb5223edad407db61f59b9b15b0080ed80" ], "author": { "name": "Hugh Dickins", "email": "hughd@google.com", "time": "Wed Mar 21 16:34:19 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:00 2012 -0700" }, "message": "memcg: lru_size instead of MEM_CGROUP_ZSTAT\n\nI never understood why we need a MEM_CGROUP_ZSTAT(mz, idx) macro to\nobscure the LRU counts. For easier searching? So call it lru_size\nrather than bare count (lru_length sounds better, but would be wrong,\nsince each huge page raises lru_size hugely).\n\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nAcked-by: Kirill A. Shutemov \u003ckirill@shutemov.name\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d79154bb5223edad407db61f59b9b15b0080ed80", "tree": "28c7c706c5a78763fb75f9ff6e6d2b3a4d7fa82d", "parents": [ "31a79235fc75b506e282e43723107a40f3bc5c07" ], "author": { "name": "Hugh Dickins", "email": "hughd@google.com", "time": "Wed Mar 21 16:34:18 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:00 2012 -0700" }, "message": "memcg: replace mem and mem_cont stragglers\n\nReplace mem and mem_cont stragglers in memcontrol.c by memcg.\n\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Kirill A. Shutemov \u003ckirill@shutemov.name\u003e\nAcked-by: Michal Hocko \u003cmhocko@suse.cz\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "31a79235fc75b506e282e43723107a40f3bc5c07", "tree": "de0d3264015e174f4182e04faed29c98c1f006f5", "parents": [ "052b1987faca3606109d88d96bce124851f7c4c2" ], "author": { "name": "Hugh Dickins", "email": "hughd@google.com", "time": "Wed Mar 21 16:34:18 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:00 2012 -0700" }, "message": "memcg: replace MEM_CONT by MEM_RES_CTLR\n\nCorrect an #endif comment in memcontrol.h from MEM_CONT to MEM_RES_CTLR.\n\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Kirill A. Shutemov \u003ckirill@shutemov.name\u003e\nAcked-by: Michal Hocko \u003cmhocko@suse.cz\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "052b1987faca3606109d88d96bce124851f7c4c2", "tree": "879df883edb01ea6e0da880e391b06bb69058129", "parents": [ "1480de0340a8d5f094b74d7c4b902456c9a06903" ], "author": { "name": "Shaohua Li", "email": "shli@kernel.org", "time": "Wed Mar 21 16:34:17 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:00 2012 -0700" }, "message": "swap: don\u0027t do discard if no discard option added\n\nWhen swapon() was not passed the SWAP_FLAG_DISCARD option, sys_swapon()\nwill still perform a discard operation. This can cause problems if\ndiscard is slow or buggy.\n\nReverse the order of the check so that a discard operation is performed\nonly if the sys_swapon() caller is attempting to enable discard.\n\nSigned-off-by: Shaohua Li \u003cshli@fusionio.com\u003e\nReported-by: Holger Kiehl \u003cHolger.Kiehl@dwd.de\u003e\nTested-by: Holger Kiehl \u003cHolger.Kiehl@dwd.de\u003e\nCc: Hugh Dickins \u003chughd@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1480de0340a8d5f094b74d7c4b902456c9a06903", "tree": "6a4c4d776b6475d8a35cb4632340227e8ab311c2", "parents": [ "88f6b4c32e531dc5b06bd05144f790847a1fdaeb" ], "author": { "name": "Konstantin Khlebnikov", "email": "khlebnikov@openvz.org", "time": "Wed Mar 21 16:34:17 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:00 2012 -0700" }, "message": "mm: forbid lumpy-reclaim in shrink_active_list()\n\nReset the reclaim mode in shrink_active_list() to RECLAIM_MODE_SINGLE |\nRECLAIM_MODE_ASYNC. (sync/async sign is used only in shrink_page_list\nand does not affect shrink_active_list)\n\nCurrenly shrink_active_list() sometimes works in lumpy-reclaim mode, if\nRECLAIM_MODE_LUMPYRECLAIM is left over from an earlier\nshrink_inactive_list(). Meanwhile, in age_active_anon()\nsc-\u003ereclaim_mode is totally zero. So the current behavior is too\ncomplex and confusing, and this looks like bug.\n\nIn general, shrink_active_list() populates the inactive list for the\nnext shrink_inactive_list(). Lumpy shring_inactive_list() isolates\npages around the chosen one from both the active and inactive lists.\nSo, there is no reason for lumpy isolation in shrink_active_list().\n\nSee also: https://lkml.org/lkml/2012/3/15/583\n\nSigned-off-by: Konstantin Khlebnikov \u003ckhlebnikov@openvz.org\u003e\nProposed-by: Hugh Dickins \u003chughd@google.com\u003e\nAcked-by: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Minchan Kim \u003cminchan@kernel.org\u003e\nCc: Mel Gorman \u003cmgorman@suse.de\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "88f6b4c32e531dc5b06bd05144f790847a1fdaeb", "tree": "751d07060432fe32200d7849e7901082968b3e51", "parents": [ "d71b5a73fe9af42752c4329b087f7911b35f8f79" ], "author": { "name": "Kautuk Consul", "email": "consul.kautuk@gmail.com", "time": "Wed Mar 21 16:34:16 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:00 2012 -0700" }, "message": "mmap.c: fix comment for __insert_vm_struct()\n\nThe comment above __insert_vm_struct seems to suggest that this function\nis also going to link the VMA with the anon_vma, but this is not true.\nThis function only links the VMA to the mm-\u003emm_rb tree and the mm-\u003emmap\nlinked list.\n\n[akpm@linux-foundation.org: improve comment layout and text]\nSigned-off-by: Kautuk Consul \u003cconsul.kautuk@gmail.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d71b5a73fe9af42752c4329b087f7911b35f8f79", "tree": "9399922a83a31a87ddfb5abe137be689580a2f9a", "parents": [ "b224ef856b1a5b949daff5937a9e187fe622b8f5" ], "author": { "name": "Andrea Arcangeli", "email": "aarcange@redhat.com", "time": "Wed Mar 21 16:34:16 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:00 2012 -0700" }, "message": "numa_emulation: fix cpumask_of_node()\n\nWithout this fix the cpumask_of_node() for a fake\u003dnuma\u003d2 is:\n\n cpumask 0 ff\n cpumask 1 ff\n\nwith the fix it\u0027s correct and it\u0027s set to:\n\n cpumask 0 55\n cpumask 1 aa\n\nSigned-off-by: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nCc: Johannes Weiner \u003cjweiner@redhat.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: \"H. Peter Anvin\" \u003chpa@zytor.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b224ef856b1a5b949daff5937a9e187fe622b8f5", "tree": "7d119425e8734eba198f83dec781d8b9c6859923", "parents": [ "8d13bddd11c10db40e2c81b4b224c11126691fc0" ], "author": { "name": "Kautuk Consul", "email": "consul.kautuk@gmail.com", "time": "Wed Mar 21 16:34:15 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:00 2012 -0700" }, "message": "page_alloc: remove unused find_zone_movable_pfns_for_nodes() argument\n\nfind_zone_movable_pfns_for_nodes() does not use its argument.\n\nSigned-off-by: Kautuk Consul \u003cconsul.kautuk@gmail.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8d13bddd11c10db40e2c81b4b224c11126691fc0", "tree": "bec31e54cbc43bf6b49c391d81893203b903b5ec", "parents": [ "d1d5e05ffdc110021ae7937802e88ae0d223dcdc" ], "author": { "name": "Kautuk Consul", "email": "consul.kautuk@gmail.com", "time": "Wed Mar 21 16:34:15 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:00 2012 -0700" }, "message": "page_alloc.c: remove add_from_early_node_map()\n\nadd_from_early_node_map() is unused.\n\nSigned-off-by: Kautuk Consul \u003cconsul.kautuk@gmail.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d1d5e05ffdc110021ae7937802e88ae0d223dcdc", "tree": "d0960138966aa0436ffad1907f3ad14dcb625ddf", "parents": [ "b69add218d32450d6604bc9080f6e33e19b06f5e" ], "author": { "name": "Hillf Danton", "email": "dhillf@gmail.com", "time": "Wed Mar 21 16:34:15 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:55:00 2012 -0700" }, "message": "hugetlbfs: return error code when initializing module\n\nReturn an errno upon failure to create inode kmem cache, and unregister\nthe FS upon failure to mount.\n\n[akpm@linux-foundation.org: remove unneeded test of `error\u0027]\nSigned-off-by: Hillf Danton \u003cdhillf@gmail.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b69add218d32450d6604bc9080f6e33e19b06f5e", "tree": "67c91d3534c2f7bf01b03a49be7543abe77d16a6", "parents": [ "40716e29243de46720e5773797791466c28904ec" ], "author": { "name": "Xiao Guangrong", "email": "xiaoguangrong@linux.vnet.ibm.com", "time": "Wed Mar 21 16:34:14 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:59 2012 -0700" }, "message": "hugetlb: remove prev_vma from hugetlb_get_unmapped_area_topdown()\n\nAfter looking up the vma which covers or follows the cached search\naddress, the following condition is always true:\n\n\t!prev_vma || (addr \u003e\u003d prev_vma-\u003evm_end)\n\nso we can stop checking the previous VMA altogether.\n\nSigned-off-by: Xiao Guangrong \u003cxiaoguangrong@linux.vnet.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "40716e29243de46720e5773797791466c28904ec", "tree": "19616ad05cbead73d0643b002a7ced8baa292ee2", "parents": [ "21a3c273f88c9cbbaf7e14505df0131d95c8f262" ], "author": { "name": "Steven Truelove", "email": "steven.truelove@utoronto.ca", "time": "Wed Mar 21 16:34:14 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:59 2012 -0700" }, "message": "hugetlbfs: fix alignment of huge page requests\n\nWhen calling shmget() with SHM_HUGETLB, shmget aligns the request size to\nPAGE_SIZE, but this is not sufficient.\n\nModify hugetlb_file_setup() to align requests to the huge page size, and\nto accept an address argument so that all alignment checks can be\nperformed in hugetlb_file_setup(), rather than in its callers. Change\nnewseg() and mmap_pgoff() to match the new prototype and eliminate a now\nredundant alignment check.\n\n[akpm@linux-foundation.org: fix build]\nSigned-off-by: Steven Truelove \u003csteven.truelove@utoronto.ca\u003e\nCc: Hugh Dickins \u003chughd@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "21a3c273f88c9cbbaf7e14505df0131d95c8f262", "tree": "f3fbc0ebe490b6a339fcea3baa8b39f2260c0b1e", "parents": [ "ea48cf7863c789579b170ef28e7fc62728365d6e" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Wed Mar 21 16:34:13 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:59 2012 -0700" }, "message": "mm, hugetlb: add thread name and pid to SHM_HUGETLB mlock rlimit warning\n\nAdd the thread name and pid of the application that is allocating shm\nsegments with MAP_HUGETLB without being a part of\n/proc/sys/vm/hugetlb_shm_group or having CAP_IPC_LOCK.\n\nThis identifies the application so it may be fixed by avoiding using the\ndeprecated exception (see Documentation/feature-removal-schedule.txt).\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Dave Jones \u003cdavej@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ea48cf7863c789579b170ef28e7fc62728365d6e", "tree": "3602d07d69e1b1b6d8a26f2b221705bb2862ee3c", "parents": [ "05af2e104a0c282dcd9303431e1360750ba76de6" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Wed Mar 21 16:34:13 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:59 2012 -0700" }, "message": "mm, counters: fold __sync_task_rss_stat() into sync_mm_rss()\n\nThere\u0027s no difference between sync_mm_rss() and __sync_task_rss_stat(),\nso fold the latter into the former.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "05af2e104a0c282dcd9303431e1360750ba76de6", "tree": "cdd5876f2d17b26cc3ded7ef85d04d0e853e9b7e", "parents": [ "90481622d75715bfcb68501280a917dbfe516029" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Wed Mar 21 16:34:13 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:59 2012 -0700" }, "message": "mm, counters: remove task argument to sync_mm_rss() and __sync_task_rss_stat()\n\nsync_mm_rss() can only be used for current to avoid race conditions in\niterating and clearing its per-task counters. Remove the task argument\nfor it and its helper function, __sync_task_rss_stat(), to avoid thinking\nit can be used safely for anything other than current.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "90481622d75715bfcb68501280a917dbfe516029", "tree": "63f7d9e4455366ab326ee74e6b39acf76b618fcf", "parents": [ "a1d776ee3147cec2a54a645e92eb2e3e2f65a137" ], "author": { "name": "David Gibson", "email": "david@gibson.dropbear.id.au", "time": "Wed Mar 21 16:34:12 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:59 2012 -0700" }, "message": "hugepages: fix use after free bug in \"quota\" handling\n\nhugetlbfs_{get,put}_quota() are badly named. They don\u0027t interact with the\ngeneral quota handling code, and they don\u0027t much resemble its behaviour.\nRather than being about maintaining limits on on-disk block usage by\nparticular users, they are instead about maintaining limits on in-memory\npage usage (including anonymous MAP_PRIVATE copied-on-write pages)\nassociated with a particular hugetlbfs filesystem instance.\n\nWorse, they work by having callbacks to the hugetlbfs filesystem code from\nthe low-level page handling code, in particular from free_huge_page().\nThis is a layering violation of itself, but more importantly, if the\nkernel does a get_user_pages() on hugepages (which can happen from KVM\namongst others), then the free_huge_page() can be delayed until after the\nassociated inode has already been freed. If an unmount occurs at the\nwrong time, even the hugetlbfs superblock where the \"quota\" limits are\nstored may have been freed.\n\nAndrew Barry proposed a patch to fix this by having hugepages, instead of\nstoring a pointer to their address_space and reaching the superblock from\nthere, had the hugepages store pointers directly to the superblock,\nbumping the reference count as appropriate to avoid it being freed.\nAndrew Morton rejected that version, however, on the grounds that it made\nthe existing layering violation worse.\n\nThis is a reworked version of Andrew\u0027s patch, which removes the extra, and\nsome of the existing, layering violation. It works by introducing the\nconcept of a hugepage \"subpool\" at the lower hugepage mm layer - that is a\nfinite logical pool of hugepages to allocate from. hugetlbfs now creates\na subpool for each filesystem instance with a page limit set, and a\npointer to the subpool gets added to each allocated hugepage, instead of\nthe address_space pointer used now. The subpool has its own lifetime and\nis only freed once all pages in it _and_ all other references to it (i.e.\nsuperblocks) are gone.\n\nsubpools are optional - a NULL subpool pointer is taken by the code to\nmean that no subpool limits are in effect.\n\nPrevious discussion of this bug found in: \"Fix refcounting in hugetlbfs\nquota handling.\". See: https://lkml.org/lkml/2011/8/11/28 or\nhttp://marc.info/?l\u003dlinux-mm\u0026m\u003d126928970510627\u0026w\u003d1\n\nv2: Fixed a bug spotted by Hillf Danton, and removed the extra parameter to\nalloc_huge_page() - since it already takes the vma, it is not necessary.\n\nSigned-off-by: Andrew Barry \u003cabarry@cray.com\u003e\nSigned-off-by: David Gibson \u003cdavid@gibson.dropbear.id.au\u003e\nCc: Hugh Dickins \u003chughd@google.com\u003e\nCc: Mel Gorman \u003cmgorman@suse.de\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: Hillf Danton \u003cdhillf@gmail.com\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a1d776ee3147cec2a54a645e92eb2e3e2f65a137", "tree": "244e9a44121be417dc9c999bed2a439b8cb01f8d", "parents": [ "ef6942224a185c9e434f6cfe69fe434e732f5b38" ], "author": { "name": "David Gibson", "email": "david@gibson.dropbear.id.au", "time": "Wed Mar 21 16:34:12 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:59 2012 -0700" }, "message": "hugetlb: cleanup hugetlb.h\n\nMake a couple of small cleanups to linux/include/hugetlb.h. The\nset_file_hugepages() function, which was not used anywhere is removed,\nand the hugetlbfs_config and hugetlbfs_inode_info structures with its\nHUGETLBFS_I helper function are moved into inode.c, the only place they\nwere used.\n\nThese structures are really linked to the hugetlbfs filesystem\nspecifically not to hugepage mm handling in general, so they belong in\nthe filesystem code not in a generally available header.\n\nIt would be nice to move the hugetlbfs_sb_info (superblock) structure in\nthere as well, but it\u0027s currently needed in a number of places via the\nhstate_vma() and hstate_inode().\n\nSigned-off-by: David Gibson \u003cdavid@gibson.dropbear.id.au\u003e\nCc: Hugh Dickins \u003chughd@google.com\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Andrew Barry \u003cabarry@cray.com\u003e\nCc: Mel Gorman \u003cmgorman@suse.de\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: Hillf Danton \u003cdhillf@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ef6942224a185c9e434f6cfe69fe434e732f5b38", "tree": "e26664dbfd6077129d75f555757d36b5fbec43c2", "parents": [ "cc9a6c8776615f9c194ccf0b63a0aa5628235545" ], "author": { "name": "Bob Liu", "email": "lliubbo@gmail.com", "time": "Wed Mar 21 16:34:11 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:59 2012 -0700" }, "message": "ksm: cleanup: introduce find_mergeable_vma()\n\nThere are multiple places which perform the same check. Add a new\nfind_mergeable_vma() to handle this.\n\nSigned-off-by: Bob Liu \u003clliubbo@gmail.com\u003e\nAcked-by: Hugh Dickins \u003chughd@google.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cc9a6c8776615f9c194ccf0b63a0aa5628235545", "tree": "0cbbf118e86541f8eb2fc7b717a0e08eaced986d", "parents": [ "e845e199362cc5712ba0e7eedc14eed70e144258" ], "author": { "name": "Mel Gorman", "email": "mgorman@suse.de", "time": "Wed Mar 21 16:34:11 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:59 2012 -0700" }, "message": "cpuset: mm: reduce large amounts of memory barrier related damage v3\n\nCommit c0ff7453bb5c (\"cpuset,mm: fix no node to alloc memory when\nchanging cpuset\u0027s mems\") wins a super prize for the largest number of\nmemory barriers entered into fast paths for one commit.\n\n[get|put]_mems_allowed is incredibly heavy with pairs of full memory\nbarriers inserted into a number of hot paths. This was detected while\ninvestigating at large page allocator slowdown introduced some time\nafter 2.6.32. The largest portion of this overhead was shown by\noprofile to be at an mfence introduced by this commit into the page\nallocator hot path.\n\nFor extra style points, the commit introduced the use of yield() in an\nimplementation of what looks like a spinning mutex.\n\nThis patch replaces the full memory barriers on both read and write\nsides with a sequence counter with just read barriers on the fast path\nside. This is much cheaper on some architectures, including x86. The\nmain bulk of the patch is the retry logic if the nodemask changes in a\nmanner that can cause a false failure.\n\nWhile updating the nodemask, a check is made to see if a false failure\nis a risk. If it is, the sequence number gets bumped and parallel\nallocators will briefly stall while the nodemask update takes place.\n\nIn a page fault test microbenchmark, oprofile samples from\n__alloc_pages_nodemask went from 4.53% of all samples to 1.15%. The\nactual results were\n\n 3.3.0-rc3 3.3.0-rc3\n rc3-vanilla nobarrier-v2r1\n Clients 1 UserTime 0.07 ( 0.00%) 0.08 (-14.19%)\n Clients 2 UserTime 0.07 ( 0.00%) 0.07 ( 2.72%)\n Clients 4 UserTime 0.08 ( 0.00%) 0.07 ( 3.29%)\n Clients 1 SysTime 0.70 ( 0.00%) 0.65 ( 6.65%)\n Clients 2 SysTime 0.85 ( 0.00%) 0.82 ( 3.65%)\n Clients 4 SysTime 1.41 ( 0.00%) 1.41 ( 0.32%)\n Clients 1 WallTime 0.77 ( 0.00%) 0.74 ( 4.19%)\n Clients 2 WallTime 0.47 ( 0.00%) 0.45 ( 3.73%)\n Clients 4 WallTime 0.38 ( 0.00%) 0.37 ( 1.58%)\n Clients 1 Flt/sec/cpu 497620.28 ( 0.00%) 520294.53 ( 4.56%)\n Clients 2 Flt/sec/cpu 414639.05 ( 0.00%) 429882.01 ( 3.68%)\n Clients 4 Flt/sec/cpu 257959.16 ( 0.00%) 258761.48 ( 0.31%)\n Clients 1 Flt/sec 495161.39 ( 0.00%) 517292.87 ( 4.47%)\n Clients 2 Flt/sec 820325.95 ( 0.00%) 850289.77 ( 3.65%)\n Clients 4 Flt/sec 1020068.93 ( 0.00%) 1022674.06 ( 0.26%)\n MMTests Statistics: duration\n Sys Time Running Test (seconds) 135.68 132.17\n User+Sys Time Running Test (seconds) 164.2 160.13\n Total Elapsed Time (seconds) 123.46 120.87\n\nThe overall improvement is small but the System CPU time is much\nimproved and roughly in correlation to what oprofile reported (these\nperformance figures are without profiling so skew is expected). The\nactual number of page faults is noticeably improved.\n\nFor benchmarks like kernel builds, the overall benefit is marginal but\nthe system CPU time is slightly reduced.\n\nTo test the actual bug the commit fixed I opened two terminals. The\nfirst ran within a cpuset and continually ran a small program that\nfaulted 100M of anonymous data. In a second window, the nodemask of the\ncpuset was continually randomised in a loop.\n\nWithout the commit, the program would fail every so often (usually\nwithin 10 seconds) and obviously with the commit everything worked fine.\nWith this patch applied, it also worked fine so the fix should be\nfunctionally equivalent.\n\nSigned-off-by: Mel Gorman \u003cmgorman@suse.de\u003e\nCc: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Christoph Lameter \u003ccl@linux.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e845e199362cc5712ba0e7eedc14eed70e144258", "tree": "3968125d82e512c3aee44ed96694fdd58b863506", "parents": [ "c7cfa37b7324a190fc36ff116d79d0f899e8d273" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Wed Mar 21 16:34:10 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:59 2012 -0700" }, "message": "mm, memcg: pass charge order to oom killer\n\nThe oom killer typically displays the allocation order at the time of oom\nas a part of its diangostic messages (for global, cpuset, and mempolicy\nooms).\n\nThe memory controller may also pass the charge order to the oom killer so\nit can emit the same information. This is useful in determining how large\nthe memory allocation is that triggered the oom killer.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: Balbir Singh \u003cbsingharora@gmail.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c7cfa37b7324a190fc36ff116d79d0f899e8d273", "tree": "391cf185d299ee0aa892fa59be8910d6f3531356", "parents": [ "9a3c531df9462df6cc2b060f749651723ffc180c" ], "author": { "name": "Copot Alexandru", "email": "alex.mihai.c@gmail.com", "time": "Wed Mar 21 16:34:10 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:59 2012 -0700" }, "message": "mm/vmscan.c: fix spelling error\n\ns/noticable/noticeable/\n\nSigned-off-by: Copot Alexandru \u003calex.mihai.c@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9a3c531df9462df6cc2b060f749651723ffc180c", "tree": "448ad57ef6ea3b462849ea1bdd4732e0296e1f4f", "parents": [ "47a133339c332f9f8e155c70f5da401aded69948" ], "author": { "name": "Andi Kleen", "email": "ak@linux.intel.com", "time": "Wed Mar 21 16:34:09 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:58 2012 -0700" }, "message": "mm: update stale lock ordering comment for memory-failure.c\n\nWhen i_mmap_lock changed to a mutex the locking order in memory failure\nwas changed to take the sleeping lock first. But the big fat mm lock\nordering comment (BFMLO) wasn\u0027t updated. Do this here.\n\nPointed out by Andrew.\n\nSigned-off-by: Andi Kleen \u003cak@linux.intel.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "47a133339c332f9f8e155c70f5da401aded69948", "tree": "94f8fb512ebe8e29d0a3f11a04b04004afd4ab59", "parents": [ "1010bb1b80edb0713415dfe1f97114d320f58c4f" ], "author": { "name": "Fengguang Wu", "email": "fengguang.wu@intel.com", "time": "Wed Mar 21 16:34:09 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:58 2012 -0700" }, "message": "mm: use global_dirty_limit in throttle_vm_writeout()\n\nWhen starting a memory hog task, a desktop box w/o swap is found to go\nunresponsive for a long time. It\u0027s solely caused by lots of congestion\nwaits in throttle_vm_writeout():\n\n gnome-system-mo-4201 553.073384: congestion_wait: throttle_vm_writeout+0x70/0x7f shrink_mem_cgroup_zone+0x48f/0x4a1\n gnome-system-mo-4201 553.073386: writeback_congestion_wait: usec_timeout\u003d100000 usec_delayed\u003d100000\n gtali-4237 553.080377: congestion_wait: throttle_vm_writeout+0x70/0x7f shrink_mem_cgroup_zone+0x48f/0x4a1\n gtali-4237 553.080378: writeback_congestion_wait: usec_timeout\u003d100000 usec_delayed\u003d100000\n Xorg-3483 553.103375: congestion_wait: throttle_vm_writeout+0x70/0x7f shrink_mem_cgroup_zone+0x48f/0x4a1\n Xorg-3483 553.103377: writeback_congestion_wait: usec_timeout\u003d100000 usec_delayed\u003d100000\n\nThe root cause is, the dirty threshold is knocked down a lot by the memory\nhog task. Fixed by using global_dirty_limit which decreases gradually on\nsuch events and can guarantee we stay above (the also decreasing) nr_dirty\nin the progress of following down to the new dirty threshold.\n\nSigned-off-by: Fengguang Wu \u003cfengguang.wu@intel.com\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Jan Kara \u003cjack@suse.cz\u003e\nCc: Greg Thelen \u003cgthelen@google.com\u003e\nCc: Ying Han \u003cyinghan@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: Mel Gorman \u003cmgorman@suse.de\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1010bb1b80edb0713415dfe1f97114d320f58c4f", "tree": "70aeaba13b61aa442e0c48c99a1035e204910982", "parents": [ "a05b0855fd15504972dba2358e5faa172a1e50ba" ], "author": { "name": "Fengguang Wu", "email": "fengguang.wu@intel.com", "time": "Wed Mar 21 16:34:08 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:58 2012 -0700" }, "message": "mm: don\u0027t set __GFP_WRITE on ramfs/sysfs writes\n\nThere is not much point in skipping zones during allocation based on the\ndirty usage which they\u0027ll never contribute to. And we\u0027d like to avoid\npage reclaim waits when writing to ramfs/sysfs etc.\n\nSigned-off-by: Fengguang Wu \u003cfengguang.wu@intel.com\u003e\nAcked-by: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Jan Kara \u003cjack@suse.cz\u003e\nCc: Greg Thelen \u003cgthelen@google.com\u003e\nCc: Ying Han \u003cyinghan@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Mel Gorman \u003cmgorman@suse.de\u003e\nAcked-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a05b0855fd15504972dba2358e5faa172a1e50ba", "tree": "f4cba4ef12d888ec472714f67ef7bcec318a5191", "parents": [ "f5bf18fa22f8c41a13eb8762c7373eb3a93a7333" ], "author": { "name": "Aneesh Kumar K.V", "email": "aneesh.kumar@linux.vnet.ibm.com", "time": "Wed Mar 21 16:34:08 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:58 2012 -0700" }, "message": "hugetlbfs: avoid taking i_mutex from hugetlbfs_read()\n\nTaking i_mutex in hugetlbfs_read() can result in deadlock with mmap as\nexplained below\n\n Thread A:\n read() on hugetlbfs\n hugetlbfs_read() called\n i_mutex grabbed\n hugetlbfs_read_actor() called\n __copy_to_user() called\n page fault is triggered\n Thread B, sharing address space with A:\n mmap() the same file\n -\u003emmap_sem is grabbed on task_B-\u003emm-\u003emmap_sem\n hugetlbfs_file_mmap() is called\n attempt to grab -\u003ei_mutex and block waiting for A to give it up\n Thread A:\n pagefault handled blocked on attempt to grab task_A-\u003emm-\u003emmap_sem,\n which happens to be the same thing as task_B-\u003emm-\u003emmap_sem. Block waiting\n for B to give it up.\n\nAFAIU the i_mutex locking was added to hugetlbfs_read() as per\nhttp://lkml.indiana.edu/hypermail/linux/kernel/0707.2/3066.html to take\ncare of the race between truncate and read. This patch fixes this by\nlooking at page-\u003emapping under lock_page() (find_lock_page()) to ensure\nthat the inode didn\u0027t get truncated in the range during a parallel read.\n\nIdeally we can extend the patch to make sure we don\u0027t increase i_size in\nmmap. But that will break userspace, because applications will now have\nto use truncate(2) to increase i_size in hugetlbfs.\n\nBased on the original patch from Hillf Danton.\n\nSigned-off-by: Aneesh Kumar K.V \u003caneesh.kumar@linux.vnet.ibm.com\u003e\nCc: Hillf Danton \u003cdhillf@gmail.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Hugh Dickins \u003chughd@google.com\u003e\nCc: \u003cstable@kernel.org\u003e\t\t[everything after 2007 :)]\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f5bf18fa22f8c41a13eb8762c7373eb3a93a7333", "tree": "3da24eb0edae3563c1937088b72a413e7026fdec", "parents": [ "f0cb3c76ae1ced85f9034480b1b24cd96530ec78" ], "author": { "name": "Nishanth Aravamudan", "email": "nacc@linux.vnet.ibm.com", "time": "Wed Mar 21 16:34:07 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:58 2012 -0700" }, "message": "bootmem/sparsemem: remove limit constraint in alloc_bootmem_section\n\nWhile testing AMS (Active Memory Sharing) / CMO (Cooperative Memory\nOvercommit) on powerpc, we tripped the following:\n\n kernel BUG at mm/bootmem.c:483!\n cpu 0x0: Vector: 700 (Program Check) at [c000000000c03940]\n pc: c000000000a62bd8: .alloc_bootmem_core+0x90/0x39c\n lr: c000000000a64bcc: .sparse_early_usemaps_alloc_node+0x84/0x29c\n sp: c000000000c03bc0\n msr: 8000000000021032\n current \u003d 0xc000000000b0cce0\n paca \u003d 0xc000000001d80000\n pid \u003d 0, comm \u003d swapper\n kernel BUG at mm/bootmem.c:483!\n enter ? for help\n [c000000000c03c80] c000000000a64bcc\n .sparse_early_usemaps_alloc_node+0x84/0x29c\n [c000000000c03d50] c000000000a64f10 .sparse_init+0x12c/0x28c\n [c000000000c03e20] c000000000a474f4 .setup_arch+0x20c/0x294\n [c000000000c03ee0] c000000000a4079c .start_kernel+0xb4/0x460\n [c000000000c03f90] c000000000009670 .start_here_common+0x1c/0x2c\n\nThis is\n\n BUG_ON(limit \u0026\u0026 goal + size \u003e limit);\n\nand after some debugging, it seems that\n\n\tgoal \u003d 0x7ffff000000\n\tlimit \u003d 0x80000000000\n\nand sparse_early_usemaps_alloc_node -\u003e\nsparse_early_usemaps_alloc_pgdat_section calls\n\n\treturn alloc_bootmem_section(usemap_size() * count, section_nr);\n\nThis is on a system with 8TB available via the AMS pool, and as a quirk\nof AMS in firmware, all of that memory shows up in node 0. So, we end\nup with an allocation that will fail the goal/limit constraints.\n\nIn theory, we could \"fall-back\" to alloc_bootmem_node() in\nsparse_early_usemaps_alloc_node(), but since we actually have HOTREMOVE\ndefined, we\u0027ll BUG_ON() instead. A simple solution appears to be to\nunconditionally remove the limit condition in alloc_bootmem_section,\nmeaning allocations are allowed to cross section boundaries (necessary\nfor systems of this size).\n\nJohannes Weiner pointed out that if alloc_bootmem_section() no longer\nguarantees section-locality, we need check_usemap_section_nr() to print\npossible cross-dependencies between node descriptors and the usemaps\nallocated through it. That makes the two loops in\nsparse_early_usemaps_alloc_node() identical, so re-factor the code a\nbit.\n\n[akpm@linux-foundation.org: code simplification]\nSigned-off-by: Nishanth Aravamudan \u003cnacc@us.ibm.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: Anton Blanchard \u003canton@au1.ibm.com\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Ben Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Robert Jennings \u003crcj@linux.vnet.ibm.com\u003e\nAcked-by: Johannes Weiner \u003channes@cmpxchg.org\u003e\nAcked-by: Mel Gorman \u003cmgorman@suse.de\u003e\nCc: \u003cstable@vger.kernel.org\u003e\t[3.3.1]\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f0cb3c76ae1ced85f9034480b1b24cd96530ec78", "tree": "997ae67621f76b3b6bf588604f85738a8c97cbef", "parents": [ "3268c63eded4612a3d07b56d1e02ce7731e6608e" ], "author": { "name": "Konstantin Khlebnikov", "email": "khlebnikov@openvz.org", "time": "Wed Mar 21 16:34:06 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:58 2012 -0700" }, "message": "mm: drain percpu lru add/rotate page-vectors on cpu hot-unplug\n\nThis cpu hotplug hook was accidentally removed in commit 00a62ce91e55\n(\"mm: fix Committed_AS underflow on large NR_CPUS environment\")\n\nThe visible effect of this accident: some pages are borrowed in per-cpu\npage-vectors. Truncate can deal with it, but these pages cannot be\nreused while this cpu is offline. So this is like a temporary memory\nleak.\n\nSigned-off-by: Konstantin Khlebnikov \u003ckhlebnikov@openvz.org\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Eric B Munson \u003cebmunson@us.ibm.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3268c63eded4612a3d07b56d1e02ce7731e6608e", "tree": "c8a07eb4cdf2697d610bb86d23eb46b0a5f892c2", "parents": [ "385de35722c9a22917e7bc5e63cd83a8cffa5ecd" ], "author": { "name": "Christoph Lameter", "email": "cl@linux.com", "time": "Wed Mar 21 16:34:06 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:58 2012 -0700" }, "message": "mm: fix move/migrate_pages() race on task struct\n\nMigration functions perform the rcu_read_unlock too early. As a result\nthe task pointed to may change from under us. This can result in an oops,\nas reported by Dave Hansen in https://lkml.org/lkml/2012/2/23/302.\n\nThe following patch extend the period of the rcu_read_lock until after the\npermissions checks are done. We also take a refcount so that the task\nreference is stable when calling security check functions and performing\ncpuset node validation (which takes a mutex).\n\nThe refcount is dropped before actual page migration occurs so there is no\nchange to the refcounts held during page migration.\n\nAlso move the determination of the mm of the task struct to immediately\nbefore the do_migrate*() calls so that it is clear that we switch from\nhandling the task during permission checks to the mm for the actual\nmigration. Since the determination is only done once and we then no\nlonger use the task_struct we can be sure that we operate on a specific\naddress space that will not change from under us.\n\n[akpm@linux-foundation.org: checkpatch fixes]\nSigned-off-by: Christoph Lameter \u003ccl@linux.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nReported-by: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Hugh Dickins \u003chughd@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "385de35722c9a22917e7bc5e63cd83a8cffa5ecd", "tree": "41ae2e23e096d189cdf614cf1eaf0c8f9ddeeb3b", "parents": [ "6d9d88d07e132259c35f9493b15429e19198489c" ], "author": { "name": "Dean Nelson", "email": "dnelson@redhat.com", "time": "Wed Mar 21 16:34:05 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:58 2012 -0700" }, "message": "thp: allow a hwpoisoned head page to be put back to LRU\n\nAndrea Arcangeli pointed out to me that a check in __memory_failure()\nwhich was intended to prevent THP tail pages from being checked for the\nabsence of the PG_lru flag (something that is always the case), was also\npreventing THP head pages from being checked.\n\nA THP head page could actually benefit from the call to shake_page() by\nending up being put back to a LRU, provided it had been waiting in a\npagevec array.\n\nAndrea suggested that the \"!PageTransCompound(p)\" in the if-statement\nshould be replaced by a \"!PageTransTail(p)\", thus allowing THP head pages\nto be checked and possibly shaken.\n\nSigned-off-by: Dean Nelson \u003cdnelson@redhat.com\u003e\nCc: Jin Dongming \u003cjin.dongming@np.css.fujitsu.com\u003e\nReviewed-by: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nCc: Hidetoshi Seto \u003cseto.hidetoshi@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6d9d88d07e132259c35f9493b15429e19198489c", "tree": "96f880fd4f2a07de312f0db576c2484ab5d09457", "parents": [ "08ab9b10d43aca091fdff58b69fc1ec89c5b8a83" ], "author": { "name": "Jarkko Sakkinen", "email": "jarkko.sakkinen@intel.com", "time": "Wed Mar 21 16:34:05 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:58 2012 -0700" }, "message": "tmpfs: security xattr setting on inode creation\n\nAdds to generic xattr support introduced in Linux 3.0 by implementing\ninitxattrs callback. This enables consulting of security attributes from\nLSM and EVM when inode is created.\n\n[hughd@google.com: moved under CONFIG_TMPFS_XATTR, with memcpy in shmem_xattr_alloc]\nSigned-off-by: Jarkko Sakkinen \u003cjarkko.sakkinen@intel.com\u003e\nReviewed-by: James Morris \u003cjames.l.morris@oracle.com\u003e\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "08ab9b10d43aca091fdff58b69fc1ec89c5b8a83", "tree": "73abfd3a257f3feadc0fa28c3117aaa9d95af596", "parents": [ "b76437579d1344b612cf1851ae610c636cec7db0" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Wed Mar 21 16:34:04 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:58 2012 -0700" }, "message": "mm, oom: force oom kill on sysrq+f\n\nThe oom killer chooses not to kill a thread if:\n\n - an eligible thread has already been oom killed and has yet to exit,\n and\n\n - an eligible thread is exiting but has yet to free all its memory and\n is not the thread attempting to currently allocate memory.\n\nSysRq+F manually invokes the global oom killer to kill a memory-hogging\ntask. This is normally done as a last resort to free memory when no\nprogress is being made or to test the oom killer itself.\n\nFor both uses, we always want to kill a thread and never defer. This\npatch causes SysRq+F to always kill an eligible thread and can be used to\nforce a kill even if another oom killed thread has failed to exit.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Pekka Enberg \u003cpenberg@kernel.org\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b76437579d1344b612cf1851ae610c636cec7db0", "tree": "37c31c957f1159635258168e27e49b90347e37aa", "parents": [ "9e81130b7ce23050335b1197bb51743517b5b9d0" ], "author": { "name": "Siddhesh Poyarekar", "email": "siddhesh.poyarekar@gmail.com", "time": "Wed Mar 21 16:34:04 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:58 2012 -0700" }, "message": "procfs: mark thread stack correctly in proc/\u003cpid\u003e/maps\n\nStack for a new thread is mapped by userspace code and passed via\nsys_clone. This memory is currently seen as anonymous in\n/proc/\u003cpid\u003e/maps, which makes it difficult to ascertain which mappings\nare being used for thread stacks. This patch uses the individual task\nstack pointers to determine which vmas are actually thread stacks.\n\nFor a multithreaded program like the following:\n\n\t#include \u003cpthread.h\u003e\n\n\tvoid *thread_main(void *foo)\n\t{\n\t\twhile(1);\n\t}\n\n\tint main()\n\t{\n\t\tpthread_t t;\n\t\tpthread_create(\u0026t, NULL, thread_main, NULL);\n\t\tpthread_join(t, NULL);\n\t}\n\nproc/PID/maps looks like the following:\n\n 00400000-00401000 r-xp 00000000 fd:0a 3671804 /home/siddhesh/a.out\n 00600000-00601000 rw-p 00000000 fd:0a 3671804 /home/siddhesh/a.out\n 019ef000-01a10000 rw-p 00000000 00:00 0 [heap]\n 7f8a44491000-7f8a44492000 ---p 00000000 00:00 0\n 7f8a44492000-7f8a44c92000 rw-p 00000000 00:00 0\n 7f8a44c92000-7f8a44e3d000 r-xp 00000000 fd:00 2097482 /lib64/libc-2.14.90.so\n 7f8a44e3d000-7f8a4503d000 ---p 001ab000 fd:00 2097482 /lib64/libc-2.14.90.so\n 7f8a4503d000-7f8a45041000 r--p 001ab000 fd:00 2097482 /lib64/libc-2.14.90.so\n 7f8a45041000-7f8a45043000 rw-p 001af000 fd:00 2097482 /lib64/libc-2.14.90.so\n 7f8a45043000-7f8a45048000 rw-p 00000000 00:00 0\n 7f8a45048000-7f8a4505f000 r-xp 00000000 fd:00 2099938 /lib64/libpthread-2.14.90.so\n 7f8a4505f000-7f8a4525e000 ---p 00017000 fd:00 2099938 /lib64/libpthread-2.14.90.so\n 7f8a4525e000-7f8a4525f000 r--p 00016000 fd:00 2099938 /lib64/libpthread-2.14.90.so\n 7f8a4525f000-7f8a45260000 rw-p 00017000 fd:00 2099938 /lib64/libpthread-2.14.90.so\n 7f8a45260000-7f8a45264000 rw-p 00000000 00:00 0\n 7f8a45264000-7f8a45286000 r-xp 00000000 fd:00 2097348 /lib64/ld-2.14.90.so\n 7f8a45457000-7f8a4545a000 rw-p 00000000 00:00 0\n 7f8a45484000-7f8a45485000 rw-p 00000000 00:00 0\n 7f8a45485000-7f8a45486000 r--p 00021000 fd:00 2097348 /lib64/ld-2.14.90.so\n 7f8a45486000-7f8a45487000 rw-p 00022000 fd:00 2097348 /lib64/ld-2.14.90.so\n 7f8a45487000-7f8a45488000 rw-p 00000000 00:00 0\n 7fff6273b000-7fff6275c000 rw-p 00000000 00:00 0 [stack]\n 7fff627ff000-7fff62800000 r-xp 00000000 00:00 0 [vdso]\n ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]\n\nHere, one could guess that 7f8a44492000-7f8a44c92000 is a stack since\nthe earlier vma that has no permissions (7f8a44e3d000-7f8a4503d000) but\nthat is not always a reliable way to find out which vma is a thread\nstack. Also, /proc/PID/maps and /proc/PID/task/TID/maps has the same\ncontent.\n\nWith this patch in place, /proc/PID/task/TID/maps are treated as \u0027maps\nas the task would see it\u0027 and hence, only the vma that that task uses as\nstack is marked as [stack]. All other \u0027stack\u0027 vmas are marked as\nanonymous memory. /proc/PID/maps acts as a thread group level view,\nwhere all thread stack vmas are marked as [stack:TID] where TID is the\nprocess ID of the task that uses that vma as stack, while the process\nstack is marked as [stack].\n\nSo /proc/PID/maps will look like this:\n\n 00400000-00401000 r-xp 00000000 fd:0a 3671804 /home/siddhesh/a.out\n 00600000-00601000 rw-p 00000000 fd:0a 3671804 /home/siddhesh/a.out\n 019ef000-01a10000 rw-p 00000000 00:00 0 [heap]\n 7f8a44491000-7f8a44492000 ---p 00000000 00:00 0\n 7f8a44492000-7f8a44c92000 rw-p 00000000 00:00 0 [stack:1442]\n 7f8a44c92000-7f8a44e3d000 r-xp 00000000 fd:00 2097482 /lib64/libc-2.14.90.so\n 7f8a44e3d000-7f8a4503d000 ---p 001ab000 fd:00 2097482 /lib64/libc-2.14.90.so\n 7f8a4503d000-7f8a45041000 r--p 001ab000 fd:00 2097482 /lib64/libc-2.14.90.so\n 7f8a45041000-7f8a45043000 rw-p 001af000 fd:00 2097482 /lib64/libc-2.14.90.so\n 7f8a45043000-7f8a45048000 rw-p 00000000 00:00 0\n 7f8a45048000-7f8a4505f000 r-xp 00000000 fd:00 2099938 /lib64/libpthread-2.14.90.so\n 7f8a4505f000-7f8a4525e000 ---p 00017000 fd:00 2099938 /lib64/libpthread-2.14.90.so\n 7f8a4525e000-7f8a4525f000 r--p 00016000 fd:00 2099938 /lib64/libpthread-2.14.90.so\n 7f8a4525f000-7f8a45260000 rw-p 00017000 fd:00 2099938 /lib64/libpthread-2.14.90.so\n 7f8a45260000-7f8a45264000 rw-p 00000000 00:00 0\n 7f8a45264000-7f8a45286000 r-xp 00000000 fd:00 2097348 /lib64/ld-2.14.90.so\n 7f8a45457000-7f8a4545a000 rw-p 00000000 00:00 0\n 7f8a45484000-7f8a45485000 rw-p 00000000 00:00 0\n 7f8a45485000-7f8a45486000 r--p 00021000 fd:00 2097348 /lib64/ld-2.14.90.so\n 7f8a45486000-7f8a45487000 rw-p 00022000 fd:00 2097348 /lib64/ld-2.14.90.so\n 7f8a45487000-7f8a45488000 rw-p 00000000 00:00 0\n 7fff6273b000-7fff6275c000 rw-p 00000000 00:00 0 [stack]\n 7fff627ff000-7fff62800000 r-xp 00000000 00:00 0 [vdso]\n ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]\n\nThus marking all vmas that are used as stacks by the threads in the\nthread group along with the process stack. The task level maps will\nhowever like this:\n\n 00400000-00401000 r-xp 00000000 fd:0a 3671804 /home/siddhesh/a.out\n 00600000-00601000 rw-p 00000000 fd:0a 3671804 /home/siddhesh/a.out\n 019ef000-01a10000 rw-p 00000000 00:00 0 [heap]\n 7f8a44491000-7f8a44492000 ---p 00000000 00:00 0\n 7f8a44492000-7f8a44c92000 rw-p 00000000 00:00 0 [stack]\n 7f8a44c92000-7f8a44e3d000 r-xp 00000000 fd:00 2097482 /lib64/libc-2.14.90.so\n 7f8a44e3d000-7f8a4503d000 ---p 001ab000 fd:00 2097482 /lib64/libc-2.14.90.so\n 7f8a4503d000-7f8a45041000 r--p 001ab000 fd:00 2097482 /lib64/libc-2.14.90.so\n 7f8a45041000-7f8a45043000 rw-p 001af000 fd:00 2097482 /lib64/libc-2.14.90.so\n 7f8a45043000-7f8a45048000 rw-p 00000000 00:00 0\n 7f8a45048000-7f8a4505f000 r-xp 00000000 fd:00 2099938 /lib64/libpthread-2.14.90.so\n 7f8a4505f000-7f8a4525e000 ---p 00017000 fd:00 2099938 /lib64/libpthread-2.14.90.so\n 7f8a4525e000-7f8a4525f000 r--p 00016000 fd:00 2099938 /lib64/libpthread-2.14.90.so\n 7f8a4525f000-7f8a45260000 rw-p 00017000 fd:00 2099938 /lib64/libpthread-2.14.90.so\n 7f8a45260000-7f8a45264000 rw-p 00000000 00:00 0\n 7f8a45264000-7f8a45286000 r-xp 00000000 fd:00 2097348 /lib64/ld-2.14.90.so\n 7f8a45457000-7f8a4545a000 rw-p 00000000 00:00 0\n 7f8a45484000-7f8a45485000 rw-p 00000000 00:00 0\n 7f8a45485000-7f8a45486000 r--p 00021000 fd:00 2097348 /lib64/ld-2.14.90.so\n 7f8a45486000-7f8a45487000 rw-p 00022000 fd:00 2097348 /lib64/ld-2.14.90.so\n 7f8a45487000-7f8a45488000 rw-p 00000000 00:00 0\n 7fff6273b000-7fff6275c000 rw-p 00000000 00:00 0\n 7fff627ff000-7fff62800000 r-xp 00000000 00:00 0 [vdso]\n ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]\n\nwhere only the vma that is being used as a stack by *that* task is\nmarked as [stack].\n\nAnalogous changes have been made to /proc/PID/smaps,\n/proc/PID/numa_maps, /proc/PID/task/TID/smaps and\n/proc/PID/task/TID/numa_maps. Relevant snippets from smaps and\nnuma_maps:\n\n [siddhesh@localhost ~ ]$ pgrep a.out\n 1441\n [siddhesh@localhost ~ ]$ cat /proc/1441/smaps | grep \"\\[stack\"\n 7f8a44492000-7f8a44c92000 rw-p 00000000 00:00 0 [stack:1442]\n 7fff6273b000-7fff6275c000 rw-p 00000000 00:00 0 [stack]\n [siddhesh@localhost ~ ]$ cat /proc/1441/task/1442/smaps | grep \"\\[stack\"\n 7f8a44492000-7f8a44c92000 rw-p 00000000 00:00 0 [stack]\n [siddhesh@localhost ~ ]$ cat /proc/1441/task/1441/smaps | grep \"\\[stack\"\n 7fff6273b000-7fff6275c000 rw-p 00000000 00:00 0 [stack]\n [siddhesh@localhost ~ ]$ cat /proc/1441/numa_maps | grep \"stack\"\n 7f8a44492000 default stack:1442 anon\u003d2 dirty\u003d2 N0\u003d2\n 7fff6273a000 default stack anon\u003d3 dirty\u003d3 N0\u003d3\n [siddhesh@localhost ~ ]$ cat /proc/1441/task/1442/numa_maps | grep \"stack\"\n 7f8a44492000 default stack anon\u003d2 dirty\u003d2 N0\u003d2\n [siddhesh@localhost ~ ]$ cat /proc/1441/task/1441/numa_maps | grep \"stack\"\n 7fff6273a000 default stack anon\u003d3 dirty\u003d3 N0\u003d3\n\n[akpm@linux-foundation.org: checkpatch fixes]\n[akpm@linux-foundation.org: fix build]\nSigned-off-by: Siddhesh Poyarekar \u003csiddhesh.poyarekar@gmail.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@gmail.com\u003e\nCc: Alexander Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Jamie Lokier \u003cjamie@shareable.org\u003e\nCc: Mike Frysinger \u003cvapier@gentoo.org\u003e\nCc: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nCc: Matt Mackall \u003cmpm@selenic.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9e81130b7ce23050335b1197bb51743517b5b9d0", "tree": "6a359131ad2c36ca9e50f0c96a17ef755ad7e168", "parents": [ "fcf4d8212a8f38334679e82ff14532b908b4b451" ], "author": { "name": "Hillf Danton", "email": "dhillf@gmail.com", "time": "Wed Mar 21 16:34:03 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:57 2012 -0700" }, "message": "mm: hugetlb: bail out unmapping after serving reference page\n\nWhen unmapping a given VM range, we could bail out if a reference page is\nsupplied and is unmapped, which is a minor optimization.\n\nSigned-off-by: Hillf Danton \u003cdhillf@gmail.com\u003e\nCc: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Hugh Dickins \u003chughd@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "fcf4d8212a8f38334679e82ff14532b908b4b451", "tree": "a074891468893f886a9604504d84bf95c983a5df", "parents": [ "d563c0501bf8702b9b683206c09b9defb37d8a8a" ], "author": { "name": "Jiri Kosina", "email": "jkosina@suse.cz", "time": "Wed Mar 21 16:34:02 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:57 2012 -0700" }, "message": "thp: documentation: \u0027transparent_hugepage\u003d\u0027 can also be specified on cmdline\n\nThe behavior of THP can either be toggled through sysfs in runtime or\nusing a kernel cmdline parameter \u0027transparent_hugepage\u003d\u0027. Document the\nlatter in kernel-parameters.txt\n\nSigned-off-by: Jiri Kosina \u003cjkosina@suse.cz\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d563c0501bf8702b9b683206c09b9defb37d8a8a", "tree": "ac3c870c1885337e340d807cd8b5dc0ad8eb0315", "parents": [ "978ea78b65794ef07eb66b9946064dea66b52554" ], "author": { "name": "Hillf Danton", "email": "dhillf@gmail.com", "time": "Wed Mar 21 16:34:02 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:57 2012 -0700" }, "message": "vmscan: handle isolated pages with lru lock released\n\nWhen shrinking inactive lru list, isolated pages are queued on locally\nprivate list, so the lock-hold time could be reduced if pages are counted\nwithout lock protection.\n\nTo achieve that, firstly updating reclaim stat is delayed until the\nputback stage, after reacquiring the lru lock.\n\nSecondly, operations related to vm and zone stats are now proteced with\npreemption disabled as they are per-cpu operations.\n\nSigned-off-by: Hillf Danton \u003cdhillf@gmail.com\u003e\nAcked-by: Hugh Dickins \u003chughd@google.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "978ea78b65794ef07eb66b9946064dea66b52554", "tree": "f1c2eea5ab72bdca622e764a52e956bfb3ae749f", "parents": [ "6583a84304e5a6cb27ec2aace79ef9c4ba888d12" ], "author": { "name": "Xiao Guangrong", "email": "xiaoguangrong@linux.vnet.ibm.com", "time": "Wed Mar 21 16:34:01 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:57 2012 -0700" }, "message": "rmap: remove __anon_vma_link() declaration\n\nThis declaration is not used anymore, remove it.\n\nSigned-off-by: Xiao Guangrong \u003cxiaoguangrong@linux.vnet.ibm.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6583a84304e5a6cb27ec2aace79ef9c4ba888d12", "tree": "48fbc25bafeeffb9527404b8a114aed8390aa5a6", "parents": [ "28073b02bfaaed1e3278acfb8e6e7c9f76d9f2b6" ], "author": { "name": "Kautuk Consul", "email": "consul.kautuk@gmail.com", "time": "Wed Mar 21 16:34:01 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:57 2012 -0700" }, "message": "rmap: anon_vma_prepare: Reduce code duplication by calling anon_vma_chain_link\n\nReduce code duplication by calling anon_vma_chain_link() from\nanon_vma_prepare().\n\nAlso move anon_vmal_chain_link() to a more suitable location in the file.\n\nSigned-off-by: Kautuk Consul \u003cconsul.kautuk@gmail.com\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Hugh Dickins \u003chughd@google.com\u003e\nReviewed-by: KAMEZWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Mel Gorman \u003cmgorman@suse.de\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "28073b02bfaaed1e3278acfb8e6e7c9f76d9f2b6", "tree": "54ab2952e2bee85780438a011cf5c1f198ff3dd9", "parents": [ "cc715d99e529d470dde2f33a6614f255adea71f3" ], "author": { "name": "Hillf Danton", "email": "dhillf@gmail.com", "time": "Wed Mar 21 16:34:00 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:57 2012 -0700" }, "message": "mm: hugetlb: defer freeing pages when gathering surplus pages\n\nWhen gathering surplus pages, the number of needed pages is recomputed\nafter reacquiring hugetlb lock to catch changes in resv_huge_pages and\nfree_huge_pages. Plus it is recomputed with the number of newly allocated\npages involved.\n\nThus freeing pages can be deferred a bit to see if the final page request\nis satisfied, though pages could be allocated less than needed.\n\nSigned-off-by: Hillf Danton \u003cdhillf@gmail.com\u003e\nReviewed-by: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Hugh Dickins \u003chughd@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cc715d99e529d470dde2f33a6614f255adea71f3", "tree": "f8e8aefb8416aed6747e9b5c071e9575484aa912", "parents": [ "ce1744f4ed20ca873360e54502f8a71564ef7cc6" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Wed Mar 21 16:34:00 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:57 2012 -0700" }, "message": "mm: vmscan: forcibly scan highmem if there are too many buffer_heads pinning highmem\n\nStuart Foster reported on bugzilla that copying large amounts of data\nfrom NTFS caused an OOM kill on 32-bit X86 with 16G of memory. Andrew\nMorton correctly identified that the problem was NTFS was using 512\nblocks meaning each page had 8 buffer_heads in low memory pinning it.\n\nIn the past, direct reclaim used to scan highmem even if the allocating\nprocess did not specify __GFP_HIGHMEM but not any more. kswapd no longer\nwill reclaim from zones that are above the high watermark. The intention\nin both cases was to minimise unnecessary reclaim. The downside is on\nmachines with large amounts of highmem that lowmem can be fully consumed\nby buffer_heads with nothing trying to free them.\n\nThe following patch is based on a suggestion by Andrew Morton to extend\nthe buffer_heads_over_limit case to force kswapd and direct reclaim to\nscan the highmem zone regardless of the allocation request or watermarks.\n\nAddresses https://bugzilla.kernel.org/show_bug.cgi?id\u003d42578\n\n[hughd@google.com: move buffer_heads_over_limit check up]\n[akpm@linux-foundation.org: buffer_heads_over_limit is unlikely]\nReported-by: Stuart Foster \u003csmf.linux@ntlworld.com\u003e\nTested-by: Stuart Foster \u003csmf.linux@ntlworld.com\u003e\nSigned-off-by: Mel Gorman \u003cmgorman@suse.de\u003e\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Christoph Lameter \u003ccl@linux.com\u003e\nCc: stable \u003cstable@vger.kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ce1744f4ed20ca873360e54502f8a71564ef7cc6", "tree": "ec26dbc6a5417c75a8fa65ab093374d3e0045032", "parents": [ "092b50bacd1cdbffef2643b7a46f2a215407919c" ], "author": { "name": "Konstantin Khlebnikov", "email": "khlebnikov@openvz.org", "time": "Wed Mar 21 16:33:59 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:57 2012 -0700" }, "message": "mm: replace PAGE_MIGRATION with IS_ENABLED(CONFIG_MIGRATION)\n\nSince commit 2a11c8ea20bf (\"kconfig: Introduce IS_ENABLED(),\nIS_BUILTIN() and IS_MODULE()\") there is a generic grep-friendly method\nfor checking config options in C expressions.\n\nSigned-off-by: Konstantin Khlebnikov \u003ckhlebnikov@openvz.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "092b50bacd1cdbffef2643b7a46f2a215407919c", "tree": "a2501b424d37c3757e9369ac36231874756bf990", "parents": [ "807f0ccfe15551afd514c062585045c88ca62037" ], "author": { "name": "Naoya Horiguchi", "email": "n-horiguchi@ah.jp.nec.com", "time": "Wed Mar 21 16:33:59 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:57 2012 -0700" }, "message": "pagemap: introduce data structure for pagemap entry\n\nCurrently a local variable of pagemap entry in pagemap_pte_range() is\nnamed pfn and typed with u64, but it\u0027s not correct (pfn should be unsigned\nlong.)\n\nThis patch introduces special type for pagemap entries and replaces code\nwith it.\n\nSigned-off-by: Naoya Horiguchi \u003cn-horiguchi@ah.jp.nec.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nCc: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "807f0ccfe15551afd514c062585045c88ca62037", "tree": "95e4b04508a85aacda0e4fc5d4a86af3ff393549", "parents": [ "e873c49fbfdd595481976b915850e682441bcbec" ], "author": { "name": "Naoya Horiguchi", "email": "n-horiguchi@ah.jp.nec.com", "time": "Wed Mar 21 16:33:58 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:57 2012 -0700" }, "message": "pagemap: document KPF_THP and make page-types aware of it\n\npage-types, which is a common user of pagemap, gets aware of thp with this\npatch. This helps system admins and kernel hackers know about how thp\nworks. Here is a sample output of page-types over a thp:\n\n $ page-types -p \u003cpid\u003e --raw --list\n\n voffset offset len flags\n ...\n 7f9d40200 3f8400 1 ___U_lA____Ma_bH______t____________\n 7f9d40201 3f8401 1ff ________________T_____t____________\n\n flags page-count MB symbolic-flags long-symbolic-flags\n 0x0000000000410000 511 1 ________________T_____t____________ compound_tail,thp\n 0x000000000040d868 1 0 ___U_lA____Ma_bH______t____________ uptodate,lru,active,mmap,anonymous,swapbacked,compound_head,thp\n\nSigned-off-by: Naoya Horiguchi \u003cn-horiguchi@ah.jp.nec.com\u003e\nAcked-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e873c49fbfdd595481976b915850e682441bcbec", "tree": "87ad5d125563d1eb6418e1f7b5a094fab6098108", "parents": [ "025c5b2451e42c9e8dfdecd6dc84956ce8f321b5" ], "author": { "name": "Naoya Horiguchi", "email": "n-horiguchi@ah.jp.nec.com", "time": "Wed Mar 21 16:33:58 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:57 2012 -0700" }, "message": "pagemap: export KPF_THP\n\nThis flag shows that a given page is a subpage of a transparent hugepage.\nIt helps us debug and test the kernel by showing physical address of thp.\n\nSigned-off-by: Naoya Horiguchi \u003cn-horiguchi@ah.jp.nec.com\u003e\nReviewed-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "025c5b2451e42c9e8dfdecd6dc84956ce8f321b5", "tree": "423b4ef1a0ce021360304a80f6e0ba902581a3ad", "parents": [ "5aaabe831eb527e0d9284f0745d830a755f70393" ], "author": { "name": "Naoya Horiguchi", "email": "n-horiguchi@ah.jp.nec.com", "time": "Wed Mar 21 16:33:57 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:57 2012 -0700" }, "message": "thp: optimize away unnecessary page table locking\n\nCurrently when we check if we can handle thp as it is or we need to split\nit into regular sized pages, we hold page table lock prior to check\nwhether a given pmd is mapping thp or not. Because of this, when it\u0027s not\n\"huge pmd\" we suffer from unnecessary lock/unlock overhead. To remove it,\nthis patch introduces a optimized check function and replace several\nsimilar logics with it.\n\n[akpm@linux-foundation.org: checkpatch fixes]\nSigned-off-by: Naoya Horiguchi \u003cn-horiguchi@ah.jp.nec.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nCc: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Jiri Slaby \u003cjslaby@suse.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5aaabe831eb527e0d9284f0745d830a755f70393", "tree": "2efdfe775da1c727c60ef5bd2d865d2150f68381", "parents": [ "b716ad953a2bc4a543143c1d9836b7007a4b182f" ], "author": { "name": "Naoya Horiguchi", "email": "n-horiguchi@ah.jp.nec.com", "time": "Wed Mar 21 16:33:57 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:56 2012 -0700" }, "message": "pagemap: avoid splitting thp when reading /proc/pid/pagemap\n\nThp split is not necessary if we explicitly check whether pmds are mapping\nthps or not. This patch introduces this check and adds code to generate\npagemap entries for pmds mapping thps, which results in less performance\nimpact of pagemap on thp.\n\nSigned-off-by: Naoya Horiguchi \u003cn-horiguchi@ah.jp.nec.com\u003e\nReviewed-by: Andi Kleen \u003cak@linux.intel.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b716ad953a2bc4a543143c1d9836b7007a4b182f", "tree": "99791c6c857b1ff7b922eaa0163ec3c912549009", "parents": [ "f44d21985eb6af7361d3785e26923355172147bd" ], "author": { "name": "Xiao Guangrong", "email": "xiaoguangrong@linux.vnet.ibm.com", "time": "Wed Mar 21 16:33:56 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:56 2012 -0700" }, "message": "mm: search from free_area_cache for the bigger size\n\nIf the required size is bigger than cached_hole_size it is better to\nsearch from free_area_cache - it is easier to get a free region,\nspecifically for the 64 bit process whose address space is large enough\n\nDo it just as hugetlb_get_unmapped_area_topdown() in arch/x86/mm/hugetlbpage.c\n\nSigned-off-by: Xiao Guangrong \u003cxiaoguangrong@linux.vnet.ibm.com\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: \"H. Peter Anvin\" \u003chpa@zytor.com\u003e\nCc: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: Hillf Danton \u003cdhillf@gmail.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f44d21985eb6af7361d3785e26923355172147bd", "tree": "1ced398274730cee6cd9173696e6fe08e52c6e91", "parents": [ "cbde83e21c4fd50bfc4240408355c1e5d393063d" ], "author": { "name": "Xiao Guangrong", "email": "xiaoguangrong@linux.vnet.ibm.com", "time": "Wed Mar 21 16:33:56 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:56 2012 -0700" }, "message": "mm: do not reset cached_hole_size when vma is unmapped\n\nIn the current code, cached_hole_size is set to the maximum value if the\nunmapped vma is less that free_area_cache so the next search will search\nfrom the base address.\n\nActually, we can keep cached_hole_size so that if the next required size\nis more than cached_hole_size, it can search from free_area_cache.\n\nSigned-off-by: Xiao Guangrong \u003cxiaoguangrong@linux.vnet.ibm.com\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: \"H. Peter Anvin\" \u003chpa@zytor.com\u003e\nCc: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: Hillf Danton \u003cdhillf@gmail.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cbde83e21c4fd50bfc4240408355c1e5d393063d", "tree": "21899d4db2dadcdaea04b019c7d9f1d62344f5b4", "parents": [ "4bfc130d5afa28395288d1b57092906349604b41" ], "author": { "name": "Xiao Guangrong", "email": "xiaoguangrong@linux.vnet.ibm.com", "time": "Wed Mar 21 16:33:55 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:56 2012 -0700" }, "message": "hugetlb: try to search again if it is really needed\n\nSearch again only if some holes may be skipped in the first pass.\n\n[akpm@linux-foundation.org: clean up crazy compound definition]\nSigned-off-by: Xiao Guangrong \u003cxiaoguangrong@linux.vnet.ibm.com\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: \"H. Peter Anvin\" \u003chpa@zytor.com\u003e\nCc: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: Hillf Danton \u003cdhillf@gmail.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4bfc130d5afa28395288d1b57092906349604b41", "tree": "947666e26c6f1e55b3ebdf5edcefda5019a65c8f", "parents": [ "aad6ec3777bf4930d4f7293745cc4c17a2d87947" ], "author": { "name": "Xiao Guangrong", "email": "xiaoguangrong@linux.vnet.ibm.com", "time": "Wed Mar 21 16:33:54 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:56 2012 -0700" }, "message": "hugetlbfs: fix hugetlb_get_unmapped_area()\n\nUse/update cached_hole_size and free_area_cache properly to speedup\nfinding of a free region.\n\nSigned-off-by: Xiao Guangrong \u003cxiaoguangrong@linux.vnet.ibm.com\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: \"H. Peter Anvin\" \u003chpa@zytor.com\u003e\nCc: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: Hillf Danton \u003cdhillf@gmail.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "aad6ec3777bf4930d4f7293745cc4c17a2d87947", "tree": "9a2d141e3361e621d5d6f624d4f1b1e075dc9e7d", "parents": [ "8575ec29f61da83a2bf382c8c490499dc022101e" ], "author": { "name": "Dan Carpenter", "email": "dan.carpenter@oracle.com", "time": "Wed Mar 21 16:33:54 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:56 2012 -0700" }, "message": "mm: compaction: make compact_control order signed\n\n\"order\" is -1 when compacting via /proc/sys/vm/compact_memory. Making\nit unsigned causes a bug in __compact_pgdat() when we test:\n\n\tif (cc-\u003eorder \u003c 0 || !compaction_deferred(zone, cc-\u003eorder))\n\t\tcompact_zone(zone, cc);\n\n[akpm@linux-foundation.org: make __compact_pgdat()\u0027s comparison match other code sites]\nSigned-off-by: Dan Carpenter \u003cdan.carpenter@oracle.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Minchan Kim \u003cminchan@kernel.org\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8575ec29f61da83a2bf382c8c490499dc022101e", "tree": "bba641ceec47b52ce2a91bdf117aed01d476ea9f", "parents": [ "aff622495c9a0b56148192e53bdec539f5e147f2" ], "author": { "name": "Hugh Dickins", "email": "hughd@google.com", "time": "Wed Mar 21 16:33:53 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:56 2012 -0700" }, "message": "compact_pgdat: workaround lockdep warning in kswapd\n\nI get this lockdep warning from swapping load on linux-next, due to\n\"vmscan: kswapd carefully call compaction\".\n\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\n[ INFO: inconsistent lock state ]\n3.3.0-rc2-next-20120201 #5 Not tainted\n---------------------------------\ninconsistent {RECLAIM_FS-ON-W} -\u003e {IN-RECLAIM_FS-W} usage.\nkswapd0/28 [HC0[0]:SC0[0]:HE1:SE1] takes:\n (pcpu_alloc_mutex){+.+.?.}, at: [\u003cffffffff810d6684\u003e] pcpu_alloc+0x67/0x325\n{RECLAIM_FS-ON-W} state was registered at:\n [\u003cffffffff81099b75\u003e] mark_held_locks+0xd7/0x103\n [\u003cffffffff8109a13c\u003e] lockdep_trace_alloc+0x85/0x9e\n [\u003cffffffff810f6bdc\u003e] __kmalloc+0x6c/0x14b\n [\u003cffffffff810d57fd\u003e] pcpu_mem_zalloc+0x59/0x62\n [\u003cffffffff810d5d16\u003e] pcpu_extend_area_map+0x26/0xb1\n [\u003cffffffff810d679f\u003e] pcpu_alloc+0x182/0x325\n [\u003cffffffff810d694d\u003e] __alloc_percpu+0xb/0xd\n [\u003cffffffff8142ebfd\u003e] snmp_mib_init+0x1e/0x2e\n [\u003cffffffff8185cd8d\u003e] ipv4_mib_init_net+0x7a/0x184\n [\u003cffffffff813dc963\u003e] ops_init.clone.0+0x6b/0x73\n [\u003cffffffff813dc9cc\u003e] register_pernet_operations+0x61/0xa0\n [\u003cffffffff813dca8e\u003e] register_pernet_subsys+0x29/0x42\n [\u003cffffffff8185d044\u003e] inet_init+0x1ad/0x252\n [\u003cffffffff810002e3\u003e] do_one_initcall+0x7a/0x12f\n [\u003cffffffff81832bc5\u003e] kernel_init+0x9d/0x11e\n [\u003cffffffff814e51e4\u003e] kernel_thread_helper+0x4/0x10\nirq event stamp: 656613\nhardirqs last enabled at (656613): [\u003cffffffff814e0ddc\u003e] __mutex_unlock_slowpath+0x104/0x128\nhardirqs last disabled at (656612): [\u003cffffffff814e0d34\u003e] __mutex_unlock_slowpath+0x5c/0x128\nsoftirqs last enabled at (655568): [\u003cffffffff8105b4a5\u003e] __do_softirq+0x120/0x136\nsoftirqs last disabled at (654757): [\u003cffffffff814e52dc\u003e] call_softirq+0x1c/0x30\n\nother info that might help us debug this:\n Possible unsafe locking scenario:\n\n CPU0\n ----\n lock(pcpu_alloc_mutex);\n \u003cInterrupt\u003e\n lock(pcpu_alloc_mutex);\n\n *** DEADLOCK ***\n\nno locks held by kswapd0/28.\n\nstack backtrace:\nPid: 28, comm: kswapd0 Not tainted 3.3.0-rc2-next-20120201 #5\nCall Trace:\n [\u003cffffffff810981f4\u003e] print_usage_bug+0x1bf/0x1d0\n [\u003cffffffff81096c3e\u003e] ? print_irq_inversion_bug+0x1d9/0x1d9\n [\u003cffffffff810982c0\u003e] mark_lock_irq+0xbb/0x22e\n [\u003cffffffff810c5399\u003e] ? free_hot_cold_page+0x13d/0x14f\n [\u003cffffffff81098684\u003e] mark_lock+0x251/0x331\n [\u003cffffffff81098893\u003e] mark_irqflags+0x12f/0x141\n [\u003cffffffff81098e32\u003e] __lock_acquire+0x58d/0x753\n [\u003cffffffff810d6684\u003e] ? pcpu_alloc+0x67/0x325\n [\u003cffffffff81099433\u003e] lock_acquire+0x54/0x6a\n [\u003cffffffff810d6684\u003e] ? pcpu_alloc+0x67/0x325\n [\u003cffffffff8107a5b8\u003e] ? add_preempt_count+0xa9/0xae\n [\u003cffffffff814e0a21\u003e] mutex_lock_nested+0x5e/0x315\n [\u003cffffffff810d6684\u003e] ? pcpu_alloc+0x67/0x325\n [\u003cffffffff81098f81\u003e] ? __lock_acquire+0x6dc/0x753\n [\u003cffffffff810c9fb0\u003e] ? __pagevec_release+0x2c/0x2c\n [\u003cffffffff810d6684\u003e] pcpu_alloc+0x67/0x325\n [\u003cffffffff810c9fb0\u003e] ? __pagevec_release+0x2c/0x2c\n [\u003cffffffff810d694d\u003e] __alloc_percpu+0xb/0xd\n [\u003cffffffff8106c35e\u003e] schedule_on_each_cpu+0x23/0x110\n [\u003cffffffff810c9fcb\u003e] lru_add_drain_all+0x10/0x12\n [\u003cffffffff810f126f\u003e] __compact_pgdat+0x20/0x182\n [\u003cffffffff810f15c2\u003e] compact_pgdat+0x27/0x29\n [\u003cffffffff810c306b\u003e] ? zone_watermark_ok+0x1a/0x1c\n [\u003cffffffff810cdf6f\u003e] balance_pgdat+0x732/0x751\n [\u003cffffffff810ce0ed\u003e] kswapd+0x15f/0x178\n [\u003cffffffff810cdf8e\u003e] ? balance_pgdat+0x751/0x751\n [\u003cffffffff8106fd11\u003e] kthread+0x84/0x8c\n [\u003cffffffff814e51e4\u003e] kernel_thread_helper+0x4/0x10\n [\u003cffffffff810787ed\u003e] ? finish_task_switch+0x85/0xea\n [\u003cffffffff814e3861\u003e] ? retint_restore_args+0xe/0xe\n [\u003cffffffff8106fc8d\u003e] ? __init_kthread_worker+0x56/0x56\n [\u003cffffffff814e51e0\u003e] ? gs_change+0xb/0xb\n\nThe RECLAIM_FS notations indicate that it\u0027s doing the GFP_FS checking that\nNick hacked into lockdep a while back: I think we\u0027re intended to read that\n\"\u003cInterrupt\u003e\" in the DEADLOCK scenario as \"\u003cDirect reclaim\u003e\".\n\nI\u0027m hazy, I have not reached any conclusion as to whether it\u0027s right to\ncomplain or not; but I believe it\u0027s uneasy about kswapd now doing the\nmutex_lock(\u0026pcpu_alloc_mutex) which lru_add_drain_all() entails. Nor have\nI reached any conclusion as to whether it\u0027s important for kswapd to do\nthat draining or not.\n\nBut so as not to get blocked on this, with lockdep disabled from giving\nfurther reports, here\u0027s a patch which removes the lru_add_drain_all() from\nkswapd\u0027s callpath (and calls it only once from compact_nodes(), instead of\nonce per node).\n\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "aff622495c9a0b56148192e53bdec539f5e147f2", "tree": "78f6400d8b6bec3279483006a0e9543e47aa833e", "parents": [ "7be62de99adcab4449d416977b4274985c5fe023" ], "author": { "name": "Rik van Riel", "email": "riel@redhat.com", "time": "Wed Mar 21 16:33:52 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:56 2012 -0700" }, "message": "vmscan: only defer compaction for failed order and higher\n\nCurrently a failed order-9 (transparent hugepage) compaction can lead to\nmemory compaction being temporarily disabled for a memory zone. Even if\nwe only need compaction for an order 2 allocation, eg. for jumbo frames\nnetworking.\n\nThe fix is relatively straightforward: keep track of the highest order at\nwhich compaction is succeeding, and only defer compaction for orders at\nwhich compaction is failing.\n\nSigned-off-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Hillf Danton \u003cdhillf@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7be62de99adcab4449d416977b4274985c5fe023", "tree": "20ae021ec9811ad730e6a17a3530d3aa6b5027d0", "parents": [ "fe2c2a106663130a5ab45cb0e3414b52df2fff0c" ], "author": { "name": "Rik van Riel", "email": "riel@redhat.com", "time": "Wed Mar 21 16:33:52 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:56 2012 -0700" }, "message": "vmscan: kswapd carefully call compaction\n\nWith CONFIG_COMPACTION enabled, kswapd does not try to free contiguous\nfree pages, even when it is woken for a higher order request.\n\nThis could be bad for eg. jumbo frame network allocations, which are done\nfrom interrupt context and cannot compact memory themselves. Higher than\nbefore allocation failure rates in the network receive path have been\nobserved in kernels with compaction enabled.\n\nTeach kswapd to defragment the memory zones in a node, but only if\nrequired and compaction is not deferred in a zone.\n\n[akpm@linux-foundation.org: reduce scope of zones_need_compaction]\nSigned-off-by: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Hillf Danton \u003cdhillf@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "fe2c2a106663130a5ab45cb0e3414b52df2fff0c", "tree": "4c2651ee4e33c73069bc41fa936b5227c9d9f2a9", "parents": [ "67f96aa252e606cdf6c3cf1032952ec207ec0cf0" ], "author": { "name": "Rik van Riel", "email": "riel@redhat.com", "time": "Wed Mar 21 16:33:51 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:56 2012 -0700" }, "message": "vmscan: reclaim at order 0 when compaction is enabled\n\nWhen built with CONFIG_COMPACTION, kswapd should not try to free\ncontiguous pages, because it is not trying hard enough to have a real\nchance at being successful, but still disrupts the LRU enough to break\nother things.\n\nDo not do higher order page isolation unless we really are in lumpy\nreclaim mode.\n\nStop reclaiming pages once we have enough free pages that compaction can\ndeal with things, and we hit the normal order 0 watermarks used by kswapd.\n\nAlso remove a line of code that increments balanced right before exiting\nthe function.\n\nSigned-off-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Hillf Danton \u003cdhillf@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "67f96aa252e606cdf6c3cf1032952ec207ec0cf0", "tree": "a5a4299dd32789831eda558b51c0120272846664", "parents": [ "c38446cc65e1f2b3eb8630c53943b94c4f65f670" ], "author": { "name": "Rik van Riel", "email": "riel@redhat.com", "time": "Wed Mar 21 16:33:50 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:56 2012 -0700" }, "message": "mm: make swapin readahead skip over holes\n\nEver since abandoning the virtual scan of processes, for scalability\nreasons, swap space has been a little more fragmented than before. This\ncan lead to the situation where a large memory user is killed, swap space\nends up full of \"holes\" and swapin readahead is totally ineffective.\n\nOn my home system, after killing a leaky firefox it took over an hour to\npage just under 2GB of memory back in, slowing the virtual machines down\nto a crawl.\n\nThis patch makes swapin readahead simply skip over holes, instead of\nstopping at them. This allows the system to swap things back in at rates\nof several MB/second, instead of a few hundred kB/second.\n\nThe checks done in valid_swaphandles are already done in\nread_swap_cache_async as well, allowing us to remove a fair amount of\ncode.\n\n[akpm@linux-foundation.org: fix it for page_cluster \u003e\u003d 32]\nSigned-off-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@gmail.com\u003e\nAcked-by: Johannes Weiner \u003channes@cmpxchg.org\u003e\nAcked-by: Mel Gorman \u003cmgorman@suse.de\u003e\nCc: Adrian Drzewiecki \u003cz@drze.net\u003e\nCc: Hugh Dickins \u003chughd@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c38446cc65e1f2b3eb8630c53943b94c4f65f670", "tree": "0eb0e73d2bef37bc1ce8212bf5dd43abdc2b5328", "parents": [ "69c978232aaa99476f9bd002c2a29a84fa3779b5" ], "author": { "name": "Hillf Danton", "email": "dhillf@gmail.com", "time": "Wed Mar 21 16:33:50 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:56 2012 -0700" }, "message": "mm: vmscan: fix misused nr_reclaimed in shrink_mem_cgroup_zone()\n\nThe value of nr_reclaimed is the number of pages reclaimed in the current\nround of the loop, whereas nr_to_reclaim should be compared with the\nnumber of pages reclaimed in all rounds.\n\nIn each round of the loop, reclaimed pages are cut off from the reclaim\ngoal, and the loop stops once the goal achieved.\n\nSigned-off-by: Hillf Danton \u003cdhillf@gmail.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Mel Gorman \u003cmgorman@suse.de\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Hugh Dickins \u003chughd@google.com\u003e\nCc: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "69c978232aaa99476f9bd002c2a29a84fa3779b5", "tree": "7edb0da034b8824040f4f7327dd31ad260532167", "parents": [ "6131728914810a6c02e08750e13e45870101e862" ], "author": { "name": "Konstantin Khlebnikov", "email": "khlebnikov@openvz.org", "time": "Wed Mar 21 16:33:49 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:55 2012 -0700" }, "message": "mm: make get_mm_counter static-inline\n\nMake get_mm_counter() always static inline, it is simple enough for that.\nAnd remove unused set_mm_counter()\n\nbloat-o-meter:\n\nadd/remove: 0/1 grow/shrink: 4/12 up/down: 99/-341 (-242)\nfunction old new delta\ntry_to_unmap_one 886 952 +66\nsys_remap_file_pages 1214 1230 +16\ndup_mm 1684 1700 +16\ndo_exit 2277 2278 +1\nzap_page_range 208 205 -3\nunmap_region 304 296 -8\nstatic.oom_kill_process 554 546 -8\ntry_to_unmap_file 1716 1700 -16\ngetrusage 925 909 -16\nflush_old_exec 1704 1688 -16\nstatic.dump_header 416 390 -26\nacct_update_integrals 218 187 -31\ndo_task_stat 2986 2954 -32\nget_mm_counter 34 - -34\nxacct_add_tsk 371 334 -37\ntask_statm 172 118 -54\ntask_mem 383 323 -60\n\ntry_to_unmap_one() grows because update_hiwater_rss() now completely inline.\n\nSigned-off-by: Konstantin Khlebnikov \u003ckhlebnikov@openvz.org\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Kirill A. Shutemov \u003ckirill@shutemov.name\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6131728914810a6c02e08750e13e45870101e862", "tree": "d96768dccd30bc5c84cfd39594167efd6405782d", "parents": [ "c3f0327f8e9d7a503f0d64573c311eddd61f197d" ], "author": { "name": "Hillf Danton", "email": "dhillf@gmail.com", "time": "Wed Mar 21 16:33:48 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:55 2012 -0700" }, "message": "mm/vmscan.c: cleanup with s/reclaim_mode/isolate_mode/\n\nWith tons of reclaim_mode (defined as one field of struct scan_control)\nalready in the file, it is clearer to rename the local reclaim_mode when\nsetting up the isolation mode.\n\nSigned-off-by: Hillf Danton \u003cdhillf@gmail.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c3f0327f8e9d7a503f0d64573c311eddd61f197d", "tree": "ebc59003d3bef08dd41d073eced2b53970e13662", "parents": [ "dc3f21eadeea6d9898271ff32d35d5e00c6872ea" ], "author": { "name": "Konstantin Khlebnikov", "email": "khlebnikov@openvz.org", "time": "Wed Mar 21 16:33:48 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:55 2012 -0700" }, "message": "mm: add rss counters consistency check\n\nWarn about non-zero rss counters at final mmdrop.\n\nThis check will prevent reoccurences of bugs such as that fixed in \"mm:\nfix rss count leakage during migration\".\n\nI didn\u0027t hide this check under CONFIG_VM_DEBUG because it rather small and\nrss counters cover whole page-table management, so this is a good\ninvariant.\n\nSigned-off-by: Konstantin Khlebnikov \u003ckhlebnikov@openvz.org\u003e\nCc: Hugh Dickins \u003chughd@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "dc3f21eadeea6d9898271ff32d35d5e00c6872ea", "tree": "be56e2d8b5bf7ce4a140d020b5e248dff6a06795", "parents": [ "8447d950e7445cae71ad66d0e33784f8388aaf9d" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Wed Mar 21 16:33:47 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:55 2012 -0700" }, "message": "mm, oom: introduce independent oom killer ratelimit state\n\nprintk_ratelimit() uses the global ratelimit state for all printks. The\noom killer should not be subjected to this state just because another\nsubsystem or driver may be flooding the kernel log.\n\nThis patch introduces printk ratelimiting specifically for the oom killer.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8447d950e7445cae71ad66d0e33784f8388aaf9d", "tree": "b7f7cfba3d2264b87ca168131e0a65d89faa51a8", "parents": [ "647f2bdf4a00dbcaa8964286501d68e7d2e6da93" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Wed Mar 21 16:33:47 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:55 2012 -0700" }, "message": "mm, oom: do not emit oom killer warning if chosen thread is already exiting\n\nIf a thread is chosen for oom kill and is already PF_EXITING, then the oom\nkiller simply sets TIF_MEMDIE and returns. This allows the thread to have\naccess to memory reserves so that it may quickly exit. This logic is\npreceeded with a comment saying there\u0027s no need to alarm the sysadmin.\nThis patch adds truth to that statement.\n\nThere\u0027s no need to emit any warning about the oom condition if the thread\nis already exiting since it will not be killed. In this condition, just\nsilently return the oom killer since its only giving access to memory\nreserves and is otherwise a no-op.\n\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: Michal Hocko \u003cmhocko@suse.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "647f2bdf4a00dbcaa8964286501d68e7d2e6da93", "tree": "a9efa94d4add977b4629b137de7f4d002eec56dd", "parents": [ "2a1c9b1fc0a0ea2e30cdeb69062647c5c5ae661f" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Wed Mar 21 16:33:46 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:55 2012 -0700" }, "message": "mm, oom: fold oom_kill_task() into oom_kill_process()\n\noom_kill_task() has a single caller, so fold it into its parent function,\noom_kill_process(). Slightly reduces the number of lines in the oom\nkiller.\n\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: Michal Hocko \u003cmhocko@suse.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" } ], "next": "2a1c9b1fc0a0ea2e30cdeb69062647c5c5ae661f" }