)]}' { "log": [ { "commit": "276dbf997043cbf38f0087624e0f9c51742c8885", "tree": "eface2519a6ad4c25c2864ee1ee69361ea3f594c", "parents": [ "924b6231edfaf1e764ffb4f97ea382bf4facff58" ], "author": { "name": "David Woodhouse", "email": "David.Woodhouse@intel.com", "time": "Sat Apr 04 01:45:37 2009 +0100" }, "committer": { "name": "David Woodhouse", "email": "David.Woodhouse@intel.com", "time": "Sat Apr 04 10:43:31 2009 +0100" }, "message": "intel-iommu: Handle PCI domains appropriately.\n\nWe were comparing {bus,devfn} and assuming that a match meant it was the\nsame device. It doesn\u0027t -- the same {bus,devfn} can exist in\nmultiple PCI domains. Include domain number in device identification\n(and call it \u0027segment\u0027 in most places, because there\u0027s already a lot of\nreferences to \u0027domain\u0027 which means something else, and this code is\ninfected with ACPI thinking already).\n\nSigned-off-by: David Woodhouse \u003cDavid.Woodhouse@intel.com\u003e\n" }, { "commit": "161fde083f3403e7aa178dc944bf43c339e18491", "tree": "79473edadf7aad496c9158400ea7bb4f8336516e", "parents": [ "b24696bc55f66fecc30715e003f10fc2555a9271" ], "author": { "name": "Han, Weidong", "email": "weidong.han@intel.com", "time": "Fri Apr 03 17:15:47 2009 +0800" }, "committer": { "name": "David Woodhouse", "email": "David.Woodhouse@intel.com", "time": "Fri Apr 03 21:46:01 2009 +0100" }, "message": "intel-iommu: set compatibility format interrupt\n\nWhen extended interrupt mode (x2apic mode) is not supported in a\nsystem, it must set compatibility format interrupt to bypass\ninterrupt remapping, otherwise compatibility format interrupts\nwill be blocked.\n\nThis will be used when interrupt remapping is enabled while x2apic\nis not supported.\n\nSigned-off-by: Weidong Han \u003cweidong.han@intel.com\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: David Woodhouse \u003cDavid.Woodhouse@intel.com\u003e\n" }, { "commit": "b24696bc55f66fecc30715e003f10fc2555a9271", "tree": "3ef565bf041a06106a73d0b27ccc256845ef5644", "parents": [ "eb4a52bc660ea835482c582eaaf4893742cbd160" ], "author": { "name": "Fenghua Yu", "email": "fenghua.yu@intel.com", "time": "Fri Mar 27 14:22:44 2009 -0700" }, "committer": { "name": "David Woodhouse", "email": "David.Woodhouse@intel.com", "time": "Fri Apr 03 21:45:59 2009 +0100" }, "message": "Intel IOMMU Suspend/Resume Support - Interrupt Remapping\n\nThis patch enables suspend/resume for interrupt remapping. During suspend,\ninterrupt remapping is disabled. When resume, interrupt remapping is enabled\nagain.\n\nSigned-off-by: Fenghua Yu \u003cfenghua.yu@intel.com\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: David Woodhouse \u003cDavid.Woodhouse@intel.com\u003e\n" }, { "commit": "f59c7b69bcba31cd355ababe067202b9895d6102", "tree": "4f06ceb6ab9a135acd9b316c806aaa99c097b373", "parents": [ "8f912ba4d7cdaf7d31cf39fe5a9b7732308a256d" ], "author": { "name": "Fenghua Yu", "email": "fenghua.yu@intel.com", "time": "Fri Mar 27 14:22:42 2009 -0700" }, "committer": { "name": "David Woodhouse", "email": "David.Woodhouse@intel.com", "time": "Fri Apr 03 21:45:54 2009 +0100" }, "message": "Intel IOMMU Suspend/Resume Support - DMAR\n\nThis patch implements the suspend and resume feature for Intel IOMMU\nDMAR. It hooks to kernel suspend and resume interface. When suspend happens, it\nsaves necessary hardware registers. When resume happens, it restores the\nregisters and restarts IOMMU by enabling translation, setting up root entry, and\nre-enabling queued invalidation.\n\nSigned-off-by: Fenghua Yu \u003cfenghua.yu@intel.com\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: David Woodhouse \u003cDavid.Woodhouse@intel.com\u003e\n" }, { "commit": "8f912ba4d7cdaf7d31cf39fe5a9b7732308a256d", "tree": "2f2e63e48c32471d729289c0772be1a093529228", "parents": [ "20bec8ab1458c24bed0d5492ee15d87807fc415a" ], "author": { "name": "David Woodhouse", "email": "David.Woodhouse@intel.com", "time": "Fri Apr 03 15:19:32 2009 +0100" }, "committer": { "name": "David Woodhouse", "email": "David.Woodhouse@intel.com", "time": "Fri Apr 03 21:45:46 2009 +0100" }, "message": "intel-iommu: Add for_each_iommu() and for_each_active_iommu() macros\n\nSigned-off-by: David Woodhouse \u003cDavid.Woodhouse@intel.com\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "20bec8ab1458c24bed0d5492ee15d87807fc415a", "tree": "e5f910947dbe314b96a591e41e2cfb2d3322caad", "parents": [ "18b34b9546dc192d978dda940673f40928d2e36e", "e7c8f5079ed9ec9e6eb1abe3defc5fb4ebfdf1cb" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 11:10:33 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 11:10:33 2009 -0700" }, "message": "Merge branch \u0027ext3-latency-fixes\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4\n\n* \u0027ext3-latency-fixes\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:\n ext3: Add replace-on-rename hueristics for data\u003dwriteback mode\n ext3: Add replace-on-truncate hueristics for data\u003dwriteback mode\n ext3: Use WRITE_SYNC for commits which are caused by fsync()\n block_write_full_page: Use synchronous writes for WBC_SYNC_ALL writebacks\n" }, { "commit": "18b34b9546dc192d978dda940673f40928d2e36e", "tree": "ca396840ed95fc46cd360c68bf2cefe5ab4cbda8", "parents": [ "ca1ee219c070eab755712d50638bbcd1f8630fc1", "d6bb69cfa88b8ac9f952de4fada5b216d5ba8830" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 10:39:20 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 10:39:20 2009 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6: (32 commits)\n regulator: twl4030 VAUX3 supports 3.0V\n regulator: Support disabling of unused regulators by machines\n regulator: Don\u0027t increment use_count for boot_on regulators\n twl4030-regulator: expose VPLL2\n regulator: refcount fixes\n regulator: Don\u0027t warn if we failed to get a regulator\n regulator: Allow boot_on regulators to be disabled by clients\n regulator: Implement list_voltage for WM835x LDOs and DCDCs\n twl4030-regulator: list more VAUX4 voltages\n regulator: Don\u0027t warn on omitted voltage constraints\n regulator: Implement list_voltage() for WM8400 DCDCs and LDOs\n MMC: regulator utilities\n regulator: twl4030 voltage enumeration (v2)\n regulator: twl4030 regulators\n regulator: get_status() grows kerneldoc\n regulator: enumerate voltages (v2)\n regulator: Fix get_mode() for WM835x DCDCs\n regulator: Allow regulators to set the initial operating mode\n regulator: Suggest use of datasheet supply or pin names for consumers\n regulator: email - update email address and regulator webpage.\n ...\n" }, { "commit": "ca1ee219c070eab755712d50638bbcd1f8630fc1", "tree": "c0c252a9095830aadc5dc9ffdd16d9167dd605c9", "parents": [ "3cc50ac0dbda5100684e570247782330155d35e0", "afeeb7cebbd223ffee303fd8de4ba97458b13581" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 10:36:57 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 10:36:57 2009 -0700" }, "message": "Merge git://git.infradead.org/iommu-2.6\n\n* git://git.infradead.org/iommu-2.6:\n intel-iommu: Fix address wrap on 32-bit kernel.\n intel-iommu: Enable DMAR on 32-bit kernel.\n intel-iommu: fix PCI device detach from virtual machine\n intel-iommu: VT-d page table to support snooping control bit\n iommu: Add domain_has_cap iommu_ops\n intel-iommu: Snooping control support\n\nFixed trivial conflicts in arch/x86/Kconfig and drivers/pci/intel-iommu.c\n" }, { "commit": "3cc50ac0dbda5100684e570247782330155d35e0", "tree": "f4b8f22d1725ebe65d2fe658d292dabacd7ed564", "parents": [ "d9b9be024a6628a01d8730d1fd0b5f25658a2794", "b797cac7487dee6bfddeb161631c1bbc54fa3cdb" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 10:07:43 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 10:07:43 2009 -0700" }, "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-fscache\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-fscache: (41 commits)\n NFS: Add mount options to enable local caching on NFS\n NFS: Display local caching state\n NFS: Store pages from an NFS inode into a local cache\n NFS: Read pages from FS-Cache into an NFS inode\n NFS: nfs_readpage_async() needs to be accessible as a fallback for local caching\n NFS: Add read context retention for FS-Cache to call back with\n NFS: FS-Cache page management\n NFS: Add some new I/O counters for FS-Cache doing things for NFS\n NFS: Invalidate FsCache page flags when cache removed\n NFS: Use local disk inode cache\n NFS: Define and create inode-level cache objects\n NFS: Define and create superblock-level objects\n NFS: Define and create server-level objects\n NFS: Register NFS for caching and retrieve the top-level index\n NFS: Permit local filesystem caching to be enabled for NFS\n NFS: Add FS-Cache option bit and debug bit\n NFS: Add comment banners to some NFS functions\n FS-Cache: Make kAFS use FS-Cache\n CacheFiles: A cache that backs onto a mounted filesystem\n CacheFiles: Export things for CacheFiles\n ...\n" }, { "commit": "d9b9be024a6628a01d8730d1fd0b5f25658a2794", "tree": "9f8e606f975f6dff4213747e85fedaccd148eb60", "parents": [ "9b59f0316bc556a1b63518f0b1224cf9be48467b", "99360b4c18f7675b50d283301d46d755affe75fd" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 10:02:45 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 10:02:45 2009 -0700" }, "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm: (36 commits)\n dm: set queue ordered mode\n dm: move wait queue declaration\n dm: merge pushback and deferred bio lists\n dm: allow uninterruptible wait for pending io\n dm: merge __flush_deferred_io into caller\n dm: move bio_io_error into __split_and_process_bio\n dm: rename __split_bio\n dm: remove unnecessary struct dm_wq_req\n dm: remove unnecessary work queue context field\n dm: remove unnecessary work queue type field\n dm: bio list add bio_list_add_head\n dm snapshot: persistent fix dtr cleanup\n dm snapshot: move status to exception store\n dm snapshot: move ctr parsing to exception store\n dm snapshot: use DMEMIT macro for status\n dm snapshot: remove dm_snap header\n dm snapshot: remove dm_snap header use\n dm exception store: move cow pointer\n dm exception store: move chunk_fields\n dm exception store: move dm_target pointer\n ...\n" }, { "commit": "3688e07f83d81941c4a8b20e29602c6d0c883539", "tree": "d7169ef37071cc14225e7700a4f6c08981f3f5e4", "parents": [ "c54c4dec61eec88de8260a00260fe89aa538f267" ], "author": { "name": "Kumar Gala", "email": "galak@kernel.crashing.org", "time": "Wed Apr 01 23:38:49 2009 -0500" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 09:48:29 2009 -0700" }, "message": "Fix highmem PPC build failure\n\nCommit f4112de6b679d84bd9b9681c7504be7bdfb7c7d5 (\"mm: introduce\ndebug_kmap_atomic\") broke PPC builds with CONFIG_HIGHMEM\u003dy:\n\n CC init/main.o\n In file included from include/linux/highmem.h:25,\n from include/linux/pagemap.h:11,\n from include/linux/mempolicy.h:63,\n from init/main.c:53:\n arch/powerpc/include/asm/highmem.h: In function \u0027kmap_atomic_prot\u0027:\n arch/powerpc/include/asm/highmem.h:98: error: implicit declaration of function \u0027debug_kmap_atomic\u0027\n In file included from include/linux/pagemap.h:11,\n from include/linux/mempolicy.h:63,\n from init/main.c:53:\n include/linux/highmem.h: At top level:\n include/linux/highmem.h:196: warning: conflicting types for \u0027debug_kmap_atomic\u0027\n include/linux/highmem.h:196: error: static declaration of \u0027debug_kmap_atomic\u0027 follows non-static declaration\n include/asm/highmem.h:98: error: previous implicit declaration of \u0027debug_kmap_atomic\u0027 was here\n make[1]: *** [init/main.o] Error 1\n make: *** [init] Error 2\n\nSigned-off-by: Kumar Gala \u003cgalak@kernel.crashing.org\u003e\nAcked-by: Akinobu Mita \u003cakinobu.mita@gmail.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c54c4dec61eec88de8260a00260fe89aa538f267", "tree": "b515c760f6eba432f05625b417612550c755efe5", "parents": [ "5de1ccbe51e89c51a2fe5ab333b7c9c2e7294aff", "0d44dc59b2b434b29aafeae581d06f81efac7c83" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 09:45:53 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 09:45:53 2009 -0700" }, "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:\n crypto: ixp4xx - Fix handling of chained sg buffers\n crypto: shash - Fix unaligned calculation with short length\n hwrng: timeriomem - Use phys address rather than virt\n" }, { "commit": "223cdea4c4b5af5181b2da00ac85711d1e0c737c", "tree": "dfe7226c70ddabbf2e2e63924ba636345278e79c", "parents": [ "31e6e2dac575c9d21a6ec56ca52ae89086baa705", "c8f517c444e4f9f55b5b5ca202b8404691a35805" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 09:08:19 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 09:08:19 2009 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://neil.brown.name/md\n\n* \u0027for-linus\u0027 of git://neil.brown.name/md: (53 commits)\n md/raid5 revise rules for when to update metadata during reshape\n md/raid5: minor code cleanups in make_request.\n md: remove CONFIG_MD_RAID_RESHAPE config option.\n md/raid5: be more careful about write ordering when reshaping.\n md: don\u0027t display meaningless values in sysfs files resync_start and sync_speed\n md/raid5: allow layout and chunksize to be changed on active array.\n md/raid5: reshape using largest of old and new chunk size\n md/raid5: prepare for allowing reshape to change layout\n md/raid5: prepare for allowing reshape to change chunksize.\n md/raid5: clearly differentiate \u0027before\u0027 and \u0027after\u0027 stripes during reshape.\n Documentation/md.txt update\n md: allow number of drives in raid5 to be reduced\n md/raid5: change reshape-progress measurement to cope with reshaping backwards.\n md: add explicit method to signal the end of a reshape.\n md/raid5: enhance raid5_size to work correctly with negative delta_disks\n md/raid5: drop qd_idx from r6_state\n md/raid6: move raid6 data processing to raid6_pq.ko\n md: raid5 run(): Fix max_degraded for raid level 4.\n md: \u0027array_size\u0027 sysfs attribute\n md: centralize -\u003earray_sectors modifications\n ...\n" }, { "commit": "ea02259fdf47ca81ff3ca0c22906d989094fb8ff", "tree": "5d3672aa246e016f695bc62a861902a50de7b461", "parents": [ "8fe74cf053de7ad2124a894996f84fa890a81093", "eae6c2b6414fc6673ac5415442fe463c01005366" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 09:02:32 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 09:02:32 2009 -0700" }, "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/linux-hdreg-h-cleanup\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/bart/linux-hdreg-h-cleanup:\n remove \u003clinux/ata.h\u003e include from \u003clinux/hdreg.h\u003e\n include/linux/hdreg.h: remove unused defines\n isd200: use ATA_* defines instead of *_STAT and *_ERR ones\n include/linux/hdreg.h: cover WIN_* and friends with #ifndef/#endif __KERNEL__\n aoe: WIN_* -\u003e ATA_CMD_*\n isd200: WIN_* -\u003e ATA_CMD_*\n include/linux/hdreg.h: cover struct hd_driveid with #ifndef/#endif __KERNEL__\n xsysace: make it \u0027struct hd_driveid\u0027-free\n ubd_kern: make it \u0027struct hd_driveid\u0027-free\n isd200: make it \u0027struct hd_driveid\u0027-free\n" }, { "commit": "f42b293d6d5259043a8944b556eeab427c695d57", "tree": "9427fb985f5426062c11755c47bbf4ba7606ee65", "parents": [ "1fcdf534885b65e6d39780a5a89e9dfc5431cf68" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:44 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:44 2009 +0100" }, "message": "NFS: nfs_readpage_async() needs to be accessible as a fallback for local caching\n\nnfs_readpage_async() needs to be non-static so that it can be used as a\nfallback for the local on-disk caching should an EIO crop up when reading the\ncache.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "6a51091d0775cdc4a923f2172c61925ad416aa32", "tree": "288fafe724eee5a0c67ff4c9bd437d35d3bbb9ab", "parents": [ "d599064a1bca7bcbaabe54b94fa73ea86952cae3" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:43 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:43 2009 +0100" }, "message": "NFS: Add some new I/O counters for FS-Cache doing things for NFS\n\nAdd some new NFS I/O counters for FS-Cache doing things for NFS. A new line is\nemitted into /proc/pid/mountstats if caching is enabled that looks like:\n\n\tfsc: \u003crok\u003e \u003crfl\u003e \u003cwok\u003e \u003cwfl\u003e \u003cunc\u003e\n\nWhere \u003crok\u003e is the number of pages read successfully from the cache, \u003crfl\u003e is\nthe number of failed page reads against the cache, \u003cwok\u003e is the number of\nsuccessful page writes to the cache, \u003cwfl\u003e is the number of failed page writes\nto the cache, and \u003cunc\u003e is the number of NFS pages that have been disconnected\nfrom the cache.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "ef79c097bbe9724e13937271b3457df560e00370", "tree": "a8671781cc0c9deb85fa76a8b4211c5e693b4343", "parents": [ "10329a5d48f5abc14a37d30b706e330f8598297a" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:43 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:43 2009 +0100" }, "message": "NFS: Use local disk inode cache\n\nBind data storage objects in the local cache to NFS inodes.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "08734048b380103f0412f58b84c2f76a2c8b599f", "tree": "34a65d40e33b12d36f5c82adb686bcdae6eab0fe", "parents": [ "147272813e043fb44bd112527951da70c1e663de" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:42 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:42 2009 +0100" }, "message": "NFS: Define and create superblock-level objects\n\nDefine and create superblock-level cache index objects (as managed by\nnfs_server structs).\n\nEach superblock object is created in a server level index object and is itself\nan index into which inode-level objects are inserted.\n\nIdeally there would be one superblock-level object per server, and the former\nwould be folded into the latter; however, since the \"nosharecache\" option\nexists this isn\u0027t possible.\n\nThe superblock object key is a sequence consisting of:\n\n (1) Certain superblock s_flags.\n\n (2) Various connection parameters that serve to distinguish superblocks for\n sget().\n\n (3) The volume FSID.\n\n (4) The security flavour.\n\n (5) The uniquifier length.\n\n (6) The uniquifier text. This is normally an empty string, unless the fsc\u003dxyz\n mount option was used to explicitly specify a uniquifier.\n\nThe key blob is of variable length, depending on the length of (6).\n\nThe superblock object is given no coherency data to carry in the auxiliary data\npermitted by the cache. It is assumed that the superblock is always coherent.\n\nThis patch also adds uniquification handling such that two otherwise identical\nsuperblocks, at least one of which is marked \"nosharecache\", won\u0027t end up\ntrying to share the on-disk cache. It will be possible to manually provide a\nuniquifier through a mount option with a later patch to avoid the error\notherwise produced.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "147272813e043fb44bd112527951da70c1e663de", "tree": "4b67df2bb809c7b661e7c6f4b1692ab8af41a996", "parents": [ "8ec442ae4c6577ed181682e534d4eef524e30b3c" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:42 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:42 2009 +0100" }, "message": "NFS: Define and create server-level objects\n\nDefine and create server-level cache index objects (as managed by nfs_client\nstructs).\n\nEach server object is created in the NFS top-level index object and is itself\nan index into which superblock-level objects are inserted.\n\nIdeally there would be one superblock-level object per server, and the former\nwould be folded into the latter; however, since the \"nosharecache\" option\nexists this isn\u0027t possible.\n\nThe server object key is a sequence consisting of:\n\n (1) NFS version\n\n (2) Server address family (eg: AF_INET or AF_INET6)\n\n (3) Server port.\n\n (4) Server IP address.\n\nThe key blob is of variable length, depending on the length of (4).\n\nThe server object is given no coherency data to carry in the auxiliary data\npermitted by the cache.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "c6a6f19e22da0a3d74214ee010224c9a30a794c1", "tree": "e10e6bf056e9a7f276e98bd55d0d04b491844807", "parents": [ "6b9b3514aa188183e74049853be43380ad49314f" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:42 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:42 2009 +0100" }, "message": "NFS: Add FS-Cache option bit and debug bit\n\nAdd FS-Cache option bit to nfs_server struct. This is set to indicate local\non-disk caching is enabled for a particular superblock.\n\nAlso add debug bit for local caching operations.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "385e1ca5f21c4680ad6a46a3aa2ea8af99e99c92", "tree": "7d887b59d943c5dd62c9604b7ea37fd2d650df71", "parents": [ "b510882281d56873e1194021643b7c325336f84f" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:39 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:39 2009 +0100" }, "message": "CacheFiles: Permit the page lock state to be monitored\n\nAdd a function to install a monitor on the page lock waitqueue for a particular\npage, thus allowing the page being unlocked to be detected.\n\nThis is used by CacheFiles to detect read completion on a page in the backing\nfilesystem so that it can then copy the data to the waiting netfs page.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "b510882281d56873e1194021643b7c325336f84f", "tree": "86cd206b0d2b55dc355833ca238d46488161b64c", "parents": [ "952efe7b7840e1c726ae88222245e4efe6bd88f3" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:39 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:39 2009 +0100" }, "message": "FS-Cache: Implement data I/O part of netfs API\n\nImplement the data I/O part of the FS-Cache netfs API. The documentation and\nAPI header file were added in a previous patch.\n\nThis patch implements the following functions for the netfs to call:\n\n (*) fscache_attr_changed().\n\n Indicate that the object has changed its attributes. The only attribute\n currently recorded is the file size. Only pages within the set file size\n will be stored in the cache.\n\n This operation is submitted for asynchronous processing, and will return\n immediately. It will return -ENOMEM if an out of memory error is\n encountered, -ENOBUFS if the object is not actually cached, or 0 if the\n operation is successfully queued.\n\n (*) fscache_read_or_alloc_page().\n (*) fscache_read_or_alloc_pages().\n\n Request data be fetched from the disk, and allocate internal metadata to\n track the netfs pages and reserve disk space for unknown pages.\n\n These operations perform semi-asynchronous data reads. Upon returning\n they will indicate which pages they think can be retrieved from disk, and\n will have set in progress attempts to retrieve those pages.\n\n These will return, in order of preference, -ENOMEM on memory allocation\n error, -ERESTARTSYS if a signal interrupted proceedings, -ENODATA if one\n or more requested pages are not yet cached, -ENOBUFS if the object is not\n actually cached or if there isn\u0027t space for future pages to be cached on\n this object, or 0 if successful.\n\n In the case of the multipage function, the pages for which reads are set\n in progress will be removed from the list and the page count decreased\n appropriately.\n\n If any read operations should fail, the completion function will be given\n an error, and will also be passed contextual information to allow the\n netfs to fall back to querying the server for the absent pages.\n\n For each successful read, the page completion function will also be\n called.\n\n Any pages subsequently tracked by the cache will have PG_fscache set upon\n them on return. fscache_uncache_page() must be called for such pages.\n\n If supplied by the netfs, the mark_pages_cached() cookie op will be\n invoked for any pages now tracked.\n\n (*) fscache_alloc_page().\n\n Allocate internal metadata to track a netfs page and reserve disk space.\n\n This will return -ENOMEM on memory allocation error, -ERESTARTSYS on\n signal, -ENOBUFS if the object isn\u0027t cached, or there isn\u0027t enough space\n in the cache, or 0 if successful.\n\n Any pages subsequently tracked by the cache will have PG_fscache set upon\n them on return. fscache_uncache_page() must be called for such pages.\n\n If supplied by the netfs, the mark_pages_cached() cookie op will be\n invoked for any pages now tracked.\n\n (*) fscache_write_page().\n\n Request data be stored to disk. This may only be called on pages that\n have been read or alloc\u0027d by the above three functions and have not yet\n been uncached.\n\n This will return -ENOMEM on memory allocation error, -ERESTARTSYS on\n signal, -ENOBUFS if the object isn\u0027t cached, or there isn\u0027t immediately\n enough space in the cache, or 0 if successful.\n\n On a successful return, this operation will have queued the page for\n asynchronous writing to the cache. The page will be returned with\n PG_fscache_write set until the write completes one way or another. The\n caller will not be notified if the write fails due to an I/O error. If\n that happens, the object will become available and all pending writes will\n be aborted.\n\n Note that the cache may batch up page writes, and so it may take a while\n to get around to writing them out.\n\n The caller must assume that until PG_fscache_write is cleared the page is\n use by the cache. Any changes made to the page may be reflected on disk.\n The page may even be under DMA.\n\n (*) fscache_uncache_page().\n\n Indicate that the cache should stop tracking a page previously read or\n alloc\u0027d from the cache. If the page was alloc\u0027d only, but unwritten, it\n will not appear on disk.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "ccc4fc3d11e91477036d1f82bfa2d442f6ce77f0", "tree": "c3ead4b385f9efce6e2688832dfb76391e18345d", "parents": [ "36c9559022850f919269564a74bf17fdabf4bb30" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:38 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:38 2009 +0100" }, "message": "FS-Cache: Implement the cookie management part of the netfs API\n\nImplement the cookie management part of the FS-Cache netfs client API. The\ndocumentation and API header file were added in a previous patch.\n\nThis patch implements the following three functions:\n\n (1) fscache_acquire_cookie().\n\n Acquire a cookie to represent an object to the netfs. If the object in\n question is a non-index object, then that object and its parent indices\n will be created on disk at this point if they don\u0027t already exist. Index\n creation is deferred because an index may reside in multiple caches.\n\n (2) fscache_relinquish_cookie().\n\n Retire or release a cookie previously acquired. At this point, the\n object on disk may be destroyed.\n\n (3) fscache_update_cookie().\n\n Update the in-cache representation of a cookie. This is used to update\n the auxiliary data for coherency management purposes.\n\nWith this patch it is possible to have a netfs instruct a cache backend to\nlook up, validate and create metadata on disk and to destroy it again.\nThe ability to actually store and retrieve data in the objects so created is\nadded in later patches.\n\nNote that these functions will never return an error. _All_ errors are\nhandled internally to FS-Cache.\n\nThe worst that can happen is that fscache_acquire_cookie() may return a NULL\npointer - which is considered a negative cookie pointer and can be passed back\nto any function that takes a cookie without harm. A negative cookie pointer\nmerely suppresses caching at that level.\n\nThe stub in linux/fscache.h will detect inline the negative cookie pointer and\nabort the operation as fast as possible. This means that the compiler doesn\u0027t\nhave to set up for a call in that case.\n\nSee the documentation in Documentation/filesystems/caching/netfs-api.txt for\nmore information.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "726dd7ff10c217dd74329c94643dc8ebea27334b", "tree": "9bd5b011f945fca4f1b057f7e7750414b1fd9fbd", "parents": [ "955d00917f0c094e0f2fb88df967e980ab66b8ca" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:38 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:38 2009 +0100" }, "message": "FS-Cache: Add netfs registration\n\nAdd functions to register and unregister a network filesystem or other client\nof the FS-Cache service. This allocates and releases the cookie representing\nthe top-level index for a netfs, and makes it available to the netfs.\n\nIf the FS-Cache facility is disabled, then the calls are optimised away at\ncompile time.\n\nNote that whilst this patch may appear to work with FS-Cache enabled and a\nnetfs attempting to use it, it will leak the cookie it allocates for the netfs\nas fscache_relinquish_cookie() is implemented in a later patch. This will\ncause the slab code to emit a warning when the module is removed.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "0e04d4cefcf4d8fbbdb2c50e93ad541582933fd2", "tree": "97c4cda6a2c246660e6a5c718a9272375cdb259c", "parents": [ "a6891645cf2ddd4778096848a864580e7258faba" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:37 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:37 2009 +0100" }, "message": "FS-Cache: Add cache tag handling\n\nImplement two features of FS-Cache:\n\n (1) The ability to request and release cache tags - names by which a cache may\n be known to a netfs, and thus selected for use.\n\n (2) An internal function by which a cache is selected by consulting the netfs,\n if the netfs wishes to be consulted.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "7394daa8c61dfda4baa687f133748fa0b599b017", "tree": "32d2c55ed60596918ec62ce6ecca186337bf4660", "parents": [ "06b3db1b9bccdc8c2c743122a89745279e5ecc46" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:37 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:37 2009 +0100" }, "message": "FS-Cache: Add use of /proc and presentation of statistics\n\nMake FS-Cache create its /proc interface and present various statistical\ninformation through it. Also provide the functions for updating this\ninformation.\n\nThese features are enabled by:\n\n\tCONFIG_FSCACHE_PROC\n\tCONFIG_FSCACHE_STATS\n\tCONFIG_FSCACHE_HISTOGRAM\n\nThe /proc directory for FS-Cache is also exported so that caching modules can\nadd their own statistics there too.\n\nThe FS-Cache module is loadable at this point, and the statistics files can be\nexamined by userspace:\n\n\tcat /proc/fs/fscache/stats\n\tcat /proc/fs/fscache/histogram\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "0dfc41d1efcc4180abfd32f68f0ade540e636ff6", "tree": "f066d08e2c33d2b475e55c5b18e4e4bff537ee75", "parents": [ "2d6fff637037395cc946ef910a880b5fa67b5370" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:36 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:36 2009 +0100" }, "message": "FS-Cache: Add the FS-Cache cache backend API and documentation\n\nAdd the API for a generic facility (FS-Cache) by which caches may declare them\nselves open for business, and may obtain work to be done from network\nfilesystems. The header file is included by:\n\n\t#include \u003clinux/fscache-cache.h\u003e\n\nDocumentation for the API is also added to:\n\n\tDocumentation/filesystems/caching/backend-api.txt\n\nThis API is not usable without the implementation of the utility functions\nwhich will be added in further patches.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "2d6fff637037395cc946ef910a880b5fa67b5370", "tree": "a369011a976d5faf4fe45cf237503078cbbfb9b4", "parents": [ "266cf658efcf6ac33541a46740f74f50c79d2b6b" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:36 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:36 2009 +0100" }, "message": "FS-Cache: Add the FS-Cache netfs API and documentation\n\nAdd the API for a generic facility (FS-Cache) by which filesystems (such as AFS\nor NFS) may call on local caching capabilities without having to know anything\nabout how the cache works, or even if there is a cache:\n\n\t+---------+\n\t| | +--------------+\n\t| NFS |--+ | |\n\t| | | +--\u003e| CacheFS |\n\t+---------+ | +----------+ | | /dev/hda5 |\n\t | | | | +--------------+\n\t+---------+ +--\u003e| | |\n\t| | | |--+\n\t| AFS |-----\u003e| FS-Cache |\n\t| | | |--+\n\t+---------+ +--\u003e| | |\n\t | | | | +--------------+\n\t+---------+ | +----------+ | | |\n\t| | | +--\u003e| CacheFiles |\n\t| ISOFS |--+ | /var/cache |\n\t| | +--------------+\n\t+---------+\n\nGeneral documentation and documentation of the netfs specific API are provided\nin addition to the header files.\n\nAs this patch stands, it is possible to build a filesystem against the facility\nand attempt to use it. All that will happen is that all requests will be\nimmediately denied as if no cache is present.\n\nFurther patches will implement the core of the facility. The facility will\ntransfer requests from networking filesystems to appropriate caches if\npossible, or else gracefully deny them.\n\nIf this facility is disabled in the kernel configuration, then all its\noperations will trivially reduce to nothing during compilation.\n\nWHY NOT I_MAPPING?\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\n\nI have added my own API to implement caching rather than using i_mapping to do\nthis for a number of reasons. These have been discussed a lot on the LKML and\nCacheFS mailing lists, but to summarise the basics:\n\n (1) Most filesystems don\u0027t do hole reportage. Holes in files are treated as\n blocks of zeros and can\u0027t be distinguished otherwise, making it difficult\n to distinguish blocks that have been read from the network and cached from\n those that haven\u0027t.\n\n (2) The backing inode must be fully populated before being exposed to\n userspace through the main inode because the VM/VFS goes directly to the\n backing inode and does not interrogate the front inode\u0027s VM ops.\n\n Therefore:\n\n (a) The backing inode must fit entirely within the cache.\n\n (b) All backed files currently open must fit entirely within the cache at\n \t the same time.\n\n (c) A working set of files in total larger than the cache may not be\n \t cached.\n\n (d) A file may not grow larger than the available space in the cache.\n\n (e) A file that\u0027s open and cached, and remotely grows larger than the\n \t cache is potentially stuffed.\n\n (3) Writes go to the backing filesystem, and can only be transferred to the\n network when the file is closed.\n\n (4) There\u0027s no record of what changes have been made, so the whole file must\n be written back.\n\n (5) The pages belong to the backing filesystem, and all metadata associated\n with that page are relevant only to the backing filesystem, and not\n anything stacked atop it.\n\nOVERVIEW\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\n\nFS-Cache provides (or will provide) the following facilities:\n\n (1) Caches can be added / removed at any time, even whilst in use.\n\n (2) Adds a facility by which tags can be used to refer to caches, even if\n they\u0027re not available yet.\n\n (3) More than one cache can be used at once. Caches can be selected\n explicitly by use of tags.\n\n (4) The netfs is provided with an interface that allows either party to\n withdraw caching facilities from a file (required for (1)).\n\n (5) A netfs may annotate cache objects that belongs to it. This permits the\n storage of coherency maintenance data.\n\n (6) Cache objects will be pinnable and space reservations will be possible.\n\n (7) The interface to the netfs returns as few errors as possible, preferring\n rather to let the netfs remain oblivious.\n\n (8) Cookies are used to represent indices, files and other objects to the\n netfs. The simplest cookie is just a NULL pointer - indicating nothing\n cached there.\n\n (9) The netfs is allowed to propose - dynamically - any index hierarchy it\n desires, though it must be aware that the index search function is\n recursive, stack space is limited, and indices can only be children of\n indices.\n\n(10) Indices can be used to group files together to reduce key size and to make\n group invalidation easier. The use of indices may make lookup quicker,\n but that\u0027s cache dependent.\n\n(11) Data I/O is effectively done directly to and from the netfs\u0027s pages. The\n netfs indicates that page A is at index B of the data-file represented by\n cookie C, and that it should be read or written. The cache backend may or\n may not start I/O on that page, but if it does, a netfs callback will be\n invoked to indicate completion. The I/O may be either synchronous or\n asynchronous.\n\n(12) Cookies can be \"retired\" upon release. At this point FS-Cache will mark\n them as obsolete and the index hierarchy rooted at that point will get\n recycled.\n\n(13) The netfs provides a \"match\" function for index searches. In addition to\n saying whether a match was made or not, this can also specify that an\n entry should be updated or deleted.\n\nFS-Cache maintains a virtual index tree in which all indices, files, objects\nand pages are kept. Bits of this tree may actually reside in one or more\ncaches.\n\n FSDEF\n |\n +------------------------------------+\n | |\n NFS AFS\n | |\n +--------------------------+ +-----------+\n | | | |\n homedir mirror afs.org redhat.com\n | | |\n +------------+ +---------------+ +----------+\n | | | | | |\n 00001 00002 00007 00125 vol00001 vol00002\n | | | | |\n +---+---+ +-----+ +---+ +------+------+ +-----+----+\n | | | | | | | | | | | | |\nPG0 PG1 PG2 PG0 XATTR PG0 PG1 DIRENT DIRENT DIRENT R/W R/O Bak\n | |\n PG0 +-------+\n | |\n 00001 00003\n |\n +---+---+\n | | |\n PG0 PG1 PG2\n\nIn the example above, two netfs\u0027s can be seen to be backed: NFS and AFS. These\nhave different index hierarchies:\n\n (*) The NFS primary index will probably contain per-server indices. Each\n server index is indexed by NFS file handles to get data file objects.\n Each data file objects can have an array of pages, but may also have\n further child objects, such as extended attributes and directory entries.\n Extended attribute objects themselves have page-array contents.\n\n (*) The AFS primary index contains per-cell indices. Each cell index contains\n per-logical-volume indices. Each of volume index contains up to three\n indices for the read-write, read-only and backup mirrors of those volumes.\n Each of these contains vnode data file objects, each of which contains an\n array of pages.\n\nThe very top index is the FS-Cache master index in which individual netfs\u0027s\nhave entries.\n\nAny index object may reside in more than one cache, provided it only has index\nchildren. Any index with non-index object children will be assumed to only\nreside in one cache.\n\nThe FS-Cache overview can be found in:\n\n\tDocumentation/filesystems/caching/fscache.txt\n\nThe netfs API to FS-Cache can be found in:\n\n\tDocumentation/filesystems/caching/netfs-api.txt\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "266cf658efcf6ac33541a46740f74f50c79d2b6b", "tree": "5c83b0879892d509e598dfd54be3ba3679ecd348", "parents": [ "03fb3d2af96c2783c3a5bc03f3d984cf422f0e69" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:36 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:36 2009 +0100" }, "message": "FS-Cache: Recruit a page flags for cache management\n\nRecruit a page flag to aid in cache management. The following extra flag is\ndefined:\n\n (1) PG_fscache (PG_private_2)\n\n The marked page is backed by a local cache and is pinning resources in the\n cache driver.\n\nIf PG_fscache is set, then things that checked for PG_private will now also\ncheck for that. This includes things like truncation and page invalidation.\nThe function page_has_private() had been added to make the checks for both\nPG_private and PG_private_2 at the same time.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "03fb3d2af96c2783c3a5bc03f3d984cf422f0e69", "tree": "6618f82f8be26ba2c7ac38d6e6e16befc8e1140f", "parents": [ "8f0aa2f25b31ba27db84259141e52ee6ec0d2820" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:35 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:35 2009 +0100" }, "message": "FS-Cache: Release page-\u003eprivate after failed readahead\n\nThe attached patch causes read_cache_pages() to release page-private data on a\npage for which add_to_page_cache() fails. If the filler function fails, then\nthe problematic page is left attached to the pagecache (with appropriate flags\nset, one presumes) and the remaining to-be-attached pages are invalidated and\ndiscarded. This permits pages with caching references associated with them to\nbe cleaned up.\n\nThe invalidatepage() address space op is called (indirectly) to do the honours.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "8f0aa2f25b31ba27db84259141e52ee6ec0d2820", "tree": "f2935c02ac8508dacd125bb1c8bb6f4879fe778e", "parents": [ "12e22c5e4bc08ab4b05ac079fe40d9891c5e81a0" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:35 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:35 2009 +0100" }, "message": "Document the slow work thread pool\n\nDocument the slow work thread pool.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "12e22c5e4bc08ab4b05ac079fe40d9891c5e81a0", "tree": "e3d34a8f21d4c00dff311dfef564c59a76e1ae70", "parents": [ "109d9272c423f46604d45fedfe87e21ee0b25180" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:35 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:35 2009 +0100" }, "message": "Make the slow work pool configurable\n\nMake the slow work pool configurable through /proc/sys/kernel/slow-work.\n\n (*) /proc/sys/kernel/slow-work/min-threads\n\n The minimum number of threads that should be in the pool as long as it is\n in use. This may be anywhere between 2 and max-threads.\n\n (*) /proc/sys/kernel/slow-work/max-threads\n\n The maximum number of threads that should in the pool. This may be\n anywhere between min-threads and 255 or NR_CPUS * 2, whichever is greater.\n\n (*) /proc/sys/kernel/slow-work/vslow-percentage\n\n The percentage of active threads in the pool that may be used to execute\n very slow work items. This may be between 1 and 99. The resultant number\n is bounded to between 1 and one fewer than the number of active threads.\n This ensures there is always at least one thread that can process very\n slow work items, and always at least one thread that won\u0027t.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "07fe7cb7c7c179f473fd9c823348fd3eb5dad369", "tree": "516c959de929a4c39870629e550b3307601fa73f", "parents": [ "8fe74cf053de7ad2124a894996f84fa890a81093" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:35 2009 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Apr 03 16:42:35 2009 +0100" }, "message": "Create a dynamically sized pool of threads for doing very slow work items\n\nCreate a dynamically sized pool of threads for doing very slow work items, such\nas invoking mkdir() or rmdir() - things that may take a long time and may\nsleep, holding mutexes/semaphores and hogging a thread, and are thus unsuitable\nfor workqueues.\n\nThe number of threads is always at least a settable minimum, but more are\nstarted when there\u0027s more work to do, up to a limit. Because of the nature of\nthe load, it\u0027s not suitable for a 1-thread-per-CPU type pool. A system with\none CPU may well want several threads.\n\nThis is used by FS-Cache to do slow caching operations in the background, such\nas looking up, creating or deleting cache objects.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nAcked-by: Steve Dickson \u003csteved@redhat.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nTested-by: Daire Byrne \u003cDaire.Byrne@framestore.com\u003e\n" }, { "commit": "f7ab34ea723ed304b19698efca85d6f40cecd99b", "tree": "28a609a654a24bc40d694fd2ec87a1f785c97c79", "parents": [ "512a004382f2c60d5c4f855476ba965adc00250c" ], "author": { "name": "Theodore Ts\u0027o", "email": "tytso@mit.edu", "time": "Fri Apr 03 01:34:35 2009 -0400" }, "committer": { "name": "Theodore Ts\u0027o", "email": "tytso@mit.edu", "time": "Fri Apr 03 01:34:35 2009 -0400" }, "message": "ext3: Add replace-on-truncate hueristics for data\u003dwriteback mode\n\nIn data\u003dwriteback mode, start an asynchronous flush when closing a\nfile which had been previously truncated down to zero. This lowers\nthe probability of data loss in the case of applications that attempt\nto replace a file using truncate.\n\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n" }, { "commit": "8fe74cf053de7ad2124a894996f84fa890a81093", "tree": "77dcd8fbf33ce53a3821942233962fb28c6f2848", "parents": [ "c2eb2fa6d2b6fe122d3479ec5b28d978418b2698", "ced117c73edc917e96dea7cca98c91383f0792f7" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 21:09:10 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 21:09:10 2009 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:\n Remove two unneeded exports and make two symbols static in fs/mpage.c\n Cleanup after commit 585d3bc06f4ca57f975a5a1f698f65a45ea66225\n Trim includes of fdtable.h\n Don\u0027t crap into descriptor table in binfmt_som\n Trim includes in binfmt_elf\n Don\u0027t mess with descriptor table in load_elf_binary()\n Get rid of indirect include of fs_struct.h\n New helper - current_umask()\n check_unsafe_exec() doesn\u0027t care about signal handlers sharing\n New locking/refcounting for fs_struct\n Take fs_struct handling to new file (fs/fs_struct.c)\n Get rid of bumping fs_struct refcount in pivot_root(2)\n Kill unsharing fs_struct in __set_personality()\n" }, { "commit": "f5f7eac41db827a47b2163330eecd7bb55ae9f12", "tree": "ae8ab45dba49c1b3d5f2088051389e6fd3e4a24c", "parents": [ "e8c158bb313c1df421eab7dc4299cd39cbbf5895" ], "author": { "name": "Robin Holt", "email": "holt@sgi.com", "time": "Thu Apr 02 16:59:46 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:05:11 2009 -0700" }, "message": "Allow rwlocks to re-enable interrupts\n\nPass the original flags to rwlock arch-code, so that it can re-enable\ninterrupts if implemented for that architecture.\n\nInitially, make __raw_read_lock_flags and __raw_write_lock_flags stubs\nwhich just do the same thing as non-flags variants.\n\nSigned-off-by: Petr Tesarik \u003cptesarik@suse.cz\u003e\nSigned-off-by: Robin Holt \u003cholt@sgi.com\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: \u003clinux-arch@vger.kernel.org\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: \"Luck, Tony\" \u003ctony.luck@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e8c158bb313c1df421eab7dc4299cd39cbbf5895", "tree": "8a5f1d01e58d0e358b2b0c9407fc494912e83c27", "parents": [ "41d577aa35aa0504fe28b76a948908bdb7fbec81" ], "author": { "name": "Robin Holt", "email": "holt@sgi.com", "time": "Thu Apr 02 16:59:45 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:05:10 2009 -0700" }, "message": "Factor out #ifdefs from kernel/spinlock.c to LOCK_CONTENDED_FLAGS\n\nSGI has observed that on large systems, interrupts are not serviced for a\nlong period of time when waiting for a rwlock. The following patch series\nre-enables irqs while waiting for the lock, resembling the code which is\nalready there for spinlocks.\n\nI only made the ia64 version, because the patch adds some overhead to the\nfast path. I assume there is currently no demand to have this for other\narchitectures, because the systems are not so large. Of course, the\npossibility to implement raw_{read|write}_lock_flags for any architecture\nis still there.\n\nThis patch:\n\nThe new macro LOCK_CONTENDED_FLAGS expands to the correct implementation\ndepending on the config options, so that IRQ\u0027s are re-enabled when\npossible, but they remain disabled if CONFIG_LOCKDEP is set.\n\nSigned-off-by: Petr Tesarik \u003cptesarik@suse.cz\u003e\nSigned-off-by: Robin Holt \u003cholt@sgi.com\u003e\nCc: \u003clinux-arch@vger.kernel.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: \"Luck, Tony\" \u003ctony.luck@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f3554f4bc69803ac2baaf7cf2aa4339e1f4b693e", "tree": "52505043de254dc3e34dad7110724fcc1f489eb9", "parents": [ "6949a6318e60aeb9c755679ac7f978aefe8c1722" ], "author": { "name": "Gerd Hoffmann", "email": "kraxel@redhat.com", "time": "Thu Apr 02 16:59:23 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:05:08 2009 -0700" }, "message": "preadv/pwritev: Add preadv and pwritev system calls.\n\nThis patch adds preadv and pwritev system calls. These syscalls are a\npretty straightforward combination of pread and readv (same for write).\nThey are quite useful for doing vectored I/O in threaded applications.\nUsing lseek+readv instead opens race windows you\u0027ll have to plug with\nlocking.\n\nOther systems have such system calls too, for example NetBSD, check\nhere: http://www.daemon-systems.org/man/preadv.2.html\n\nThe application-visible interface provided by glibc should look like\nthis to be compatible to the existing implementations in the *BSD family:\n\n ssize_t preadv(int d, const struct iovec *iov, int iovcnt, off_t offset);\n ssize_t pwritev(int d, const struct iovec *iov, int iovcnt, off_t offset);\n\nThis prototype has one problem though: On 32bit archs is the (64bit)\noffset argument unaligned, which the syscall ABI of several archs doesn\u0027t\nallow to do. At least s390 needs a wrapper in glibc to handle this. As\nwe\u0027ll need a wrappers in glibc anyway I\u0027ve decided to push problem to\nglibc entriely and use a syscall prototype which works without\narch-specific wrappers inside the kernel: The offset argument is\nexplicitly splitted into two 32bit values.\n\nThe patch sports the actual system call implementation and the windup in\nthe x86 system call tables. Other archs follow as separate patches.\n\nSigned-off-by: Gerd Hoffmann \u003ckraxel@redhat.com\u003e\nCc: Arnd Bergmann \u003carnd@arndb.de\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: \u003clinux-api@vger.kernel.org\u003e\nCc: \u003clinux-arch@vger.kernel.org\u003e\nCc: Ralf Baechle \u003cralf@linux-mips.org\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": "04d491ab2a53008a1aa98ac09561768c7f3adda3", "tree": "ab8fff6fb8674c8061b733ce64d6d6fba9d68ff3", "parents": [ "23c36c1aec895fd52d7dd8cd3ce4bbce43c969fd" ], "author": { "name": "Neil Horman", "email": "nhorman@tuxdriver.com", "time": "Thu Apr 02 16:58:57 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:05:04 2009 -0700" }, "message": "kexec: add dmesg log symbols to /proc/vmcoreinfo lists\n\nIt would be nice to be able to extract the dmesg log from a vmcore file\nwithout needing to keep the debug symbols for the running kernel handy all\nthe time. We have a facility to do this in /proc/vmcore. This patch adds\nthe log_buf and log_end symbols to the vmcoreinfo area so that tools (like\nmakedumpfile) can easily extract the dmesg logs from a vmcore image.\n\n[akpm@linux-foundation.org: several fixes and cleanups]\n[akpm@linux-foundation.org: fix unused log_buf_kexec_setup()]\n[akpm@linux-foundation.org: build fix]\nSigned-off-by: Neil Horman \u003cnhorman@tuxdriver.com\u003e\nCc: Simon Horman \u003chorms@verge.net.au\u003e\nAcked-by: Vivek Goyal \u003cvgoyal@redhat.com\u003e\nCc: Neil Horman \u003cnhorman@tuxdriver.com\u003e\nCc: Simon Horman \u003chorms@verge.net.au\u003e\nCc: Vivek Goyal \u003cvgoyal@redhat.com\u003e\nCc: Randy Dunlap \u003crandy.dunlap@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": "7c5ff4f92e2b47c56d777a5adbadd9a52841b635", "tree": "5cd4d13300b523d7cc3e8afd5d30f587a0c42cef", "parents": [ "8641a3845d066f841ca591ac1c480b13bea7d849" ], "author": { "name": "Harry Ciao", "email": "qingtao.cao@windriver.com", "time": "Thu Apr 02 16:58:48 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:05:03 2009 -0700" }, "message": "pci: Add AMD8111 PCI Bridge PCI Device ID\n\nAdd the PCI Device ID of the PCI Bridge Controller on AMD8111 chip.\n\nSigned-off-by: Harry Ciao \u003cqingtao.cao@windriver.com\u003e\nCc: Doug Thompson \u003cnorsk5@yahoo.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1b0f7ffd0ea27cd3a0b9ca04e3df9522048c32a3", "tree": "a8c27acdf95f55f93fe86661c6cba4cd36c8e4f1", "parents": [ "52ee2dfdd4f51cf422ea6a96a0846dc94244aa37" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Apr 02 16:58:39 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:05:02 2009 -0700" }, "message": "pids: kill signal_struct-\u003e __pgrp/__session and friends\n\nWe are wasting 2 words in signal_struct without any reason to implement\ntask_pgrp_nr() and task_session_nr().\n\ntask_session_nr() has no callers since\n2e2ba22ea4fd4bb85f0fa37c521066db6775cbef, we can remove it.\n\ntask_pgrp_nr() is still (I believe wrongly) used in fs/autofsX and\nfs/coda.\n\nThis patch reimplements task_pgrp_nr() via task_pgrp_nr_ns(), and kills\n__pgrp/__session and the related helpers.\n\nThe change in drivers/char/tty_io.c is cosmetic, but hopefully makes sense\nanyway.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Alan Cox \u003cnumber6@the-village.bc.nu\u003e\t\t[tty parts]\nCc: Cedric Le Goater \u003cclg@fr.ibm.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: Eric Biederman \u003cebiederm@xmission.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: Sukadev Bhattiprolu \u003csukadev@linux.vnet.ibm.com\u003e\nCc: Roland McGrath \u003croland@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": "52ee2dfdd4f51cf422ea6a96a0846dc94244aa37", "tree": "e15753e01d2c2fbe980edc45f78a9ae77d2cf891", "parents": [ "2ae448efc87df6d328f5835969076c7f9fce59c3" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Apr 02 16:58:38 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:05:02 2009 -0700" }, "message": "pids: refactor vnr/nr_ns helpers to make them safe\n\nInho, the safety rules for vnr/nr_ns helpers are horrible and buggy.\n\ntask_pid_nr_ns(task) needs rcu/tasklist depending on task \u003d\u003d current.\n\nAs for \"special\" pids, vnr/nr_ns helpers always need rcu. However, if\ntask !\u003d current, they are unsafe even under rcu lock, we can\u0027t trust\ntask-\u003egroup_leader without the special checks.\n\nAnd almost every helper has a callsite which needs a fix.\n\nAlso, it is a bit annoying that the implementations of, say,\ntask_pgrp_vnr() and task_pgrp_nr_ns() are not \"symmetrical\".\n\nThis patch introduces the new helper, __task_pid_nr_ns(), which is always\nsafe to use, and turns all other helpers into the trivial wrappers.\n\nAfter this I\u0027ll send another patch which converts task_tgid_xxx() as well,\nthey\u0027re are a bit special.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Louis Rilling \u003cLouis.Rilling@kerlabs.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Sukadev Bhattiprolu \u003csukadev@linux.vnet.ibm.com\u003e\nCc: Roland McGrath \u003croland@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": "6dda81f4384b94930826eded254d8c16f89a9248", "tree": "a7b27ca16a6feba637cb01e68b54c58b6ca07bc2", "parents": [ "8e654fba4a376f436bdfe361fc5cdbc87ac09b35" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Apr 02 16:58:35 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:05:02 2009 -0700" }, "message": "pids: document task_pgrp/task_session is not safe without tasklist/rcu\n\nEven if task \u003d\u003d current, it is not safe to dereference the result of\ntask_pgrp/task_session. We can race with another thread which changes the\nspecial pid via setpgid/setsid.\n\nDocument this. The next 2 patches give an example of the unsafe usage, we\nhave more bad users.\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Louis Rilling \u003cLouis.Rilling@kerlabs.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Sukadev Bhattiprolu \u003csukadev@linux.vnet.ibm.com\u003e\nCc: Roland McGrath \u003croland@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": "1f80769ffd36e74357fe896dc43dddf1af1510f3", "tree": "633e513143c276b3bcee9e4743938902f906a919", "parents": [ "a50b0aa4bd9a7d42112442a385f3dc0e775284dd" ], "author": { "name": "Paul Fulghum", "email": "paulkf@microgate.com", "time": "Thu Apr 02 16:58:30 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:05:01 2009 -0700" }, "message": "synclink_gt: add clock options\n\nAdd support for x8 asynchronous sample rate and ability to specify base\nclock frequency.\n\nSigned-off-by: Paul Fulghum \u003cpaulkf@microgate.com\u003e\nAcked-by: Alan Cox \u003calan@lxorguk.ukuu.org.uk\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a50b0aa4bd9a7d42112442a385f3dc0e775284dd", "tree": "f4707e5a1c524545c8caa40eebbe8764c20bfe93", "parents": [ "ab4ad55512e95b68ca3e25516068e18874f89252" ], "author": { "name": "Kirill A. Shutemov", "email": "kirill@shutemov.name", "time": "Thu Apr 02 16:58:29 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:05:01 2009 -0700" }, "message": "struct linux_binprm: drop unused fields\n\nSigned-off-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": "40e8a10de2c9f87e892dcd5a6f9d1b208329ffea", "tree": "e00ac938e40dfbc0595346487485317af84c6094", "parents": [ "2355b70fd59cb5be7de2052a9edeee7afb7ff099" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Thu Apr 02 16:58:25 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:05:00 2009 -0700" }, "message": "cpu hotplug: remove unused cpuhotplug_mutex_lock()\n\ncpuhotplug_mutex_lock() is not used, remove it.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nAcked-by: Gautham R Shenoy \u003cego@in.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": "bb24c679a51b1a9b726b901330649e3861814ac0", "tree": "0acb31023b4b6ff49e173005fb9baaa3f3b74b2f", "parents": [ "5dfc80be73dd0c212d2e6dd8dbf5afa07e680bbe" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Apr 02 16:58:20 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:05:00 2009 -0700" }, "message": "tracehook_notify_death: use task_detached() helper\n\nNow that task_detached() is exported, change tracehook_notify_death() to\nuse this helper, nobody else checks -\u003eexit_signal \u003d\u003d -1 by hand.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: \"Metzger, Markus T\" \u003cmarkus.t.metzger@intel.com\u003e\nAcked-by: Roland McGrath \u003croland@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": "39c626ae47c469abdfd30c6e42eff884931380d6", "tree": "58cbe75bac79ce8ef55c94189df26448d0283918", "parents": [ "7f5d3652d469cdf9eb2365dfea7ce3fb9e1409cc" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Apr 02 16:58:18 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:05:00 2009 -0700" }, "message": "forget_original_parent: split out the un-ptrace part\n\nBy discussion with Roland.\n\n- Rename ptrace_exit() to exit_ptrace(), and change it to do all the\n necessary work with -\u003eptraced list by its own.\n\n- Move this code from exit.c to ptrace.c\n\n- Update the comment in ptrace_detach() to explain the rechecking of\n the child-\u003eptrace.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: \"Metzger, Markus T\" \u003cmarkus.t.metzger@intel.com\u003e\nCc: Roland McGrath \u003croland@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": "4576145c1ecdaaea9ef8976a48335206aa1ebf91", "tree": "b20b51848380b708f4158852b1bb4afa29ffc5f0", "parents": [ "b1b4c6799fb59e710454bfe0ab477cb8523a8667" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Apr 02 16:58:14 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:59 2009 -0700" }, "message": "ptrace: fix possible zombie leak on PTRACE_DETACH\n\nWhen ptrace_detach() takes tasklist, the tracee can be SIGKILL\u0027ed. If it\nhas already passed exit_notify() we can leak a zombie, because a) ptracing\ndisables the auto-reaping logic, and b) -\u003ereal_parent was not notified\nabout the child\u0027s death.\n\nptrace_detach() should follow the ptrace_exit\u0027s logic, change the code\naccordingly.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Jerome Marchand \u003cjmarchan@redhat.com\u003e\nCc: Roland McGrath \u003croland@redhat.com\u003e\nTested-by: Denys Vlasenko \u003cdvlasenk@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": "43918f2bf4806675943416d539d9d5e4d585ebff", "tree": "1de2ea08eed647b181b7f008f95e4bc4ec34c343", "parents": [ "90bc8d8b1a38f1ab131a2399a202e1889db95de8" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Apr 02 16:58:00 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:58 2009 -0700" }, "message": "signals: remove \u0027handler\u0027 parameter to tracehook functions\n\nContainer-init must behave like global-init to processes within the\ncontainer and hence it must be immune to unhandled fatal signals from\nwithin the container (i.e SIG_DFL signals that terminate the process).\n\nBut the same container-init must behave like a normal process to processes\nin ancestor namespaces and so if it receives the same fatal signal from a\nprocess in ancestor namespace, the signal must be processed.\n\nImplementing these semantics requires that send_signal() determine pid\nnamespace of the sender but since signals can originate from workqueues/\ninterrupt-handlers, determining pid namespace of sender may not always be\npossible or safe.\n\nThis patchset implements the design/simplified semantics suggested by\nOleg Nesterov. The simplified semantics for container-init are:\n\n\t- container-init must never be terminated by a signal from a\n\t descendant process.\n\n\t- container-init must never be immune to SIGKILL from an ancestor\n\t namespace (so a process in parent namespace must always be able\n\t to terminate a descendant container).\n\n\t- container-init may be immune to unhandled fatal signals (like\n\t SIGUSR1) even if they are from ancestor namespace. SIGKILL/SIGSTOP\n\t are the only reliable signals to a container-init from ancestor\n\t namespace.\n\nThis patch:\n\nBased on an earlier patch submitted by Oleg Nesterov and comments from\nRoland McGrath (http://lkml.org/lkml/2008/11/19/258).\n\nThe handler parameter is currently unused in the tracehook functions.\nBesides, the tracehook functions are called with siglock held, so the\nfunctions can check the handler if they later need to.\n\nRemoving the parameter simiplifies changes to sig_ignored() in a follow-on\npatch.\n\nSigned-off-by: Sukadev Bhattiprolu \u003csukadev@linux.vnet.ibm.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Daniel Lezcano \u003cdaniel.lezcano@free.fr\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": "a1bc5a4eee990a1f290735c8694d0aebdad095fa", "tree": "f3e5849823444136df9c7f91f7217e1894235682", "parents": [ "7f81b1ae18416b457e4d5ff23f0bd598e8a42224" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Thu Apr 02 16:57:54 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:57 2009 -0700" }, "message": "cpusets: replace zone allowed functions with node allowed\n\nThe cpuset_zone_allowed() variants are actually only a function of the\nzone\u0027s node.\n\nCc: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\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": "bd1a8ab73edd449fecda633449cc277b856ad4f5", "tree": "66095c2a59f8706138e89190ec6c1d9cfaab6916", "parents": [ "0b4217b3fdddc4a58939720d3ed809537577d48b" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Thu Apr 02 16:57:50 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:56 2009 -0700" }, "message": "cgroups: add \u0027data\u0027 field to struct cgroup_scanner\n\nWe need to pass some data to test_task() or process_task() in some cases.\nWill be used later.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@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": "a3b2d692690aef228e493b1beaafe5364cab3237", "tree": "d3ad99c5370462861a1b918b4136e7bd7ad78e52", "parents": [ "3c776e64660028236313f0e54f3a9945764422df" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Thu Apr 02 16:57:45 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:56 2009 -0700" }, "message": "cgroups: use css id in swap cgroup for saving memory v5\n\nTry to use CSS ID for records in swap_cgroup. By this, on 64bit machine,\nsize of swap_cgroup goes down to 2 bytes from 8bytes.\n\nThis means, when 2GB of swap is equipped, (assume the page size is 4096bytes)\n\n\tFrom size of swap_cgroup \u003d 2G/4k * 8 \u003d 4Mbytes.\n\tTo size of swap_cgroup \u003d 2G/4k * 2 \u003d 1Mbytes.\n\nReduction is large. Of course, there are trade-offs. This CSS ID will\nadd overhead to swap-in/swap-out/swap-free.\n\nBut in general,\n - swap is a resource which the user tend to avoid use.\n - If swap is never used, swap_cgroup area is not used.\n - Reading traditional manuals, size of swap should be proportional to\n size of memory. Memory size of machine is increasing now.\n\nI think reducing size of swap_cgroup makes sense.\n\nNote:\n - ID-\u003eCSS lookup routine has no locks, it\u0027s under RCU-Read-Side.\n - memcg can be obsolete at rmdir() but not freed while refcnt from\n swap_cgroup is available.\n\nChangelog v4-\u003ev5:\n - reworked on to memcg-charge-swapcache-to-proper-memcg.patch\nChanglog -\u003ev4:\n - fixed not configured case.\n - deleted unnecessary comments.\n - fixed NULL pointer bug.\n - fixed message in dmesg.\n\n[nishimura@mxp.nes.nec.co.jp: css_tryget can be called twice in !PageCgroupUsed case]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: 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": "3918b96e03b2b8dd05889320623f6870e81d35ec", "tree": "b00b009a4e7b2a2605e592c5faf262c6006f74f5", "parents": [ "c137b5ece4b111e46981aae7da77315b9909809f" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Thu Apr 02 16:57:41 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:56 2009 -0700" }, "message": "memcg: remove mem_cgroup_reclaim_imbalance() remnants\n\ncommit 4f98a2fee8acdb4ac84545df98cccecfd130f8db (vmscan: split LRU lists\ninto anon \u0026 file sets) removed mem_cgroup_reclaim_imbalance(), but there\nare some leftovers in memcontrol.h.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@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": "c137b5ece4b111e46981aae7da77315b9909809f", "tree": "99677d3ae0f9016e83f257743ff04d5886a6e998", "parents": [ "e222432bfa7dcf6ec008622a978c9f284ed5e3a9" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Thu Apr 02 16:57:40 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:55 2009 -0700" }, "message": "memcg: remove mem_cgroup_calc_mapped_ratio()\n\nCurrently, mem_cgroup_calc_mapped_ratio() is unused at all. it can be\nremoved and KAMEZAWA-san suggested it.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.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": "e222432bfa7dcf6ec008622a978c9f284ed5e3a9", "tree": "b006f569cb66523a5644ad0ef1669b051ccda907", "parents": [ "0b7f569e45bb6be142d87017030669a6a7d327a1" ], "author": { "name": "Balbir Singh", "email": "balbir@linux.vnet.ibm.com", "time": "Thu Apr 02 16:57:39 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:55 2009 -0700" }, "message": "memcg: show memcg information during OOM\n\nAdd RSS and swap to OOM output from memcg\n\nDisplay memcg values like failcnt, usage and limit when an OOM occurs due\nto memcg.\n\nThanks to Johannes Weiner, Li Zefan, David Rientjes, Kamezawa Hiroyuki,\nDaisuke Nishimura and KOSAKI Motohiro for review.\n\nSample output\n-------------\n\nTask in /a/x killed as a result of limit of /a\nmemory: usage 1048576kB, limit 1048576kB, failcnt 4183\nmemory+swap: usage 1400964kB, limit 9007199254740991kB, failcnt 0\n\n[akpm@linux-foundation.org: compilation fix]\n[akpm@linux-foundation.org: fix kerneldoc and whitespace]\n[akpm@linux-foundation.org: add printk facility level]\nSigned-off-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.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": "0b7f569e45bb6be142d87017030669a6a7d327a1", "tree": "8df7877b95c093ebf4cb4e1006cea16f75fc79b7", "parents": [ "81d39c20f5ee2437d71709beb82597e2a38efbbc" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Thu Apr 02 16:57:38 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:55 2009 -0700" }, "message": "memcg: fix OOM killer under memcg\n\nThis patch tries to fix OOM Killer problems caused by hierarchy.\nNow, memcg itself has OOM KILL function (in oom_kill.c) and tries to\nkill a task in memcg.\n\nBut, when hierarchy is used, it\u0027s broken and correct task cannot\nbe killed. For example, in following cgroup\n\n\t/groupA/\thierarchy\u003d1, limit\u003d1G,\n\t\t01\tnolimit\n\t\t02\tnolimit\nAll tasks\u0027 memory usage under /groupA, /groupA/01, groupA/02 is limited to\ngroupA\u0027s 1Gbytes but OOM Killer just kills tasks in groupA.\n\nThis patch provides makes the bad process be selected from all tasks\nunder hierarchy. BTW, currently, oom_jiffies is updated against groupA\nin above case. oom_jiffies of tree should be updated.\n\nTo see how oom_jiffies is used, please check mem_cgroup_oom_called()\ncallers.\n\n[akpm@linux-foundation.org: build fix]\n[akpm@linux-foundation.org: const fix]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\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": "099fca3225b39f7a3ed853036038054172b55581", "tree": "c7a8863f9ca8a5c745297e9ee43b63494b6022d1", "parents": [ "b6719ec1ad54e47e40633b19703f2c1254708842" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Thu Apr 02 16:57:29 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:54 2009 -0700" }, "message": "cgroups: show correct file mode\n\nWe have some read-only files and write-only files, but currently they are\nall set to 0644, which is counter-intuitive and cause trouble for some\ncgroup tools like libcgroup.\n\nThis patch adds \u0027mode\u0027 to struct cftype to allow cgroup subsys to set it\u0027s\nown files\u0027 file mode, and for the most cases cft-\u003emode can be default to 0\nand cgroup will figure out proper mode.\n\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Li Zefan \u003clizf@cn.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": "ec64f51545fffbc4cb968f0cea56341a4b07e85a", "tree": "575d890a6759d81f3324fa2a22ca6ab14a41eefc", "parents": [ "38460b48d06440de46b34cb778bd6c4855030754" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Thu Apr 02 16:57:26 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:54 2009 -0700" }, "message": "cgroup: fix frequent -EBUSY at rmdir\n\nIn following situation, with memory subsystem,\n\n\t/groupA use_hierarchy\u003d\u003d1\n\t\t/01 some tasks\n\t\t/02 some tasks\n\t\t/03 some tasks\n\t\t/04 empty\n\nWhen tasks under 01/02/03 hit limit on /groupA, hierarchical reclaim\nis triggered and the kernel walks tree under groupA. In this case,\nrmdir /groupA/04 fails with -EBUSY frequently because of temporal\nrefcnt from the kernel.\n\nIn general. cgroup can be rmdir\u0027d if there are no children groups and\nno tasks. Frequent fails of rmdir() is not useful to users.\n(And the reason for -EBUSY is unknown to users.....in most cases)\n\nThis patch tries to modify above behavior, by\n\t- retries if css_refcnt is got by someone.\n\t- add \"return value\" to pre_destroy() and allows subsystem to\n\t say \"we\u0027re really busy!\"\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.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": "38460b48d06440de46b34cb778bd6c4855030754", "tree": "8f3362a446b5b03879f715c3f7279e70842bcca9", "parents": [ "313e924c0852943e67335fad9d2608701f0dfe8e" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Thu Apr 02 16:57:25 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:53 2009 -0700" }, "message": "cgroup: CSS ID support\n\nPatch for Per-CSS(Cgroup Subsys State) ID and private hierarchy code.\n\nThis patch attaches unique ID to each css and provides following.\n\n - css_lookup(subsys, id)\n returns pointer to struct cgroup_subysys_state of id.\n - css_get_next(subsys, id, rootid, depth, foundid)\n returns the next css under \"root\" by scanning\n\nWhen cgroup_subsys-\u003euse_id is set, an id for css is maintained.\n\nThe cgroup framework only parepares\n\t- css_id of root css for subsys\n\t- id is automatically attached at creation of css.\n\t- id is *not* freed automatically. Because the cgroup framework\n\t don\u0027t know lifetime of cgroup_subsys_state.\n\t free_css_id() function is provided. This must be called by subsys.\n\nThere are several reasons to develop this.\n\t- Saving space .... For example, memcg\u0027s swap_cgroup is array of\n\t pointers to cgroup. But it is not necessary to be very fast.\n\t By replacing pointers(8bytes per ent) to ID (2byes per ent), we can\n\t reduce much amount of memory usage.\n\n\t- Scanning without lock.\n\t CSS_ID provides \"scan id under this ROOT\" function. By this, scanning\n\t css under root can be written without locks.\n\t ex)\n\t do {\n\t\trcu_read_lock();\n\t\tnext \u003d cgroup_get_next(subsys, id, root, \u0026found);\n\t\t/* check sanity of next here */\n\t\tcss_tryget();\n\t\trcu_read_unlock();\n\t\tid \u003d found + 1\n\t } while(...)\n\nCharacteristics:\n\t- Each css has unique ID under subsys.\n\t- Lifetime of ID is controlled by subsys.\n\t- css ID contains \"ID\" and \"Depth in hierarchy\" and stack of hierarchy\n\t- Allowed ID is 1-65535, ID 0 is UNUSED ID.\n\nDesign Choices:\n\t- scan-by-ID v.s. scan-by-tree-walk.\n\t As /proc\u0027s pid scan does, scan-by-ID is robust when scanning is done\n\t by following kind of routine.\n\t scan -\u003e rest a while(release a lock) -\u003e conitunue from interrupted\n\t memcg\u0027s hierarchical reclaim does this.\n\n\t- When subsys-\u003euse_id is set, # of css in the system is limited to\n\t 65535.\n\n[bharata@linux.vnet.ibm.com: remove rcu_read_lock() from css_get_next()]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nSigned-off-by: Bharata B Rao \u003cbharata@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": "313e924c0852943e67335fad9d2608701f0dfe8e", "tree": "fa4c3f65a7ed6edea52ae78b012138ebab1420c3", "parents": [ "d20a390a0ee2bf2f692c539c6ce1c829e1080bb5" ], "author": { "name": "Grzegorz Nosek", "email": "root@localdomain.pl", "time": "Thu Apr 02 16:57:23 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:53 2009 -0700" }, "message": "cgroups: relax ns_can_attach checks to allow attaching to grandchild cgroups\n\nThe ns_proxy cgroup allows moving processes to child cgroups only one\nlevel deep at a time. This commit relaxes this restriction and makes it\npossible to attach tasks directly to grandchild cgroups, e.g.:\n\n($pid is in the root cgroup)\necho $pid \u003e /cgroup/CG1/CG2/tasks\n\nPreviously this operation would fail with -EPERM and would have to be\nperformed as two steps:\necho $pid \u003e /cgroup/CG1/tasks\necho $pid \u003e /cgroup/CG1/CG2/tasks\n\nAlso, the target cgroup no longer needs to be empty to move a task there.\n\nSigned-off-by: Grzegorz Nosek \u003croot@localdomain.pl\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nReviewed-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@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": "d20a390a0ee2bf2f692c539c6ce1c829e1080bb5", "tree": "50fc49556959daf7da2f7194e8f5d02b2e52e3d8", "parents": [ "45dad7bd9d9b65a30d6e790b111f6f2d8f746d22" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Thu Apr 02 16:57:22 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:53 2009 -0700" }, "message": "cgroups: fix cgroup.h comments\n\nFix the style of some multi-line comments in cgroup.h to match\nDocumentation/CodingStyle\n\nSigned-off-by: Paul Menage \u003cmenage@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": "039fd8ce6258e01ec29f1637f9bf1868dd877c55", "tree": "dcc90b006655eecad1d0cd82850feef2398976fa", "parents": [ "b277c884f7856ce0791b1e72079023a86767981b" ], "author": { "name": "Cyrus Massoumi", "email": "cyrusm@gmx.net", "time": "Thu Apr 02 16:57:12 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:52 2009 -0700" }, "message": "ext3: remove the BKL in ext3/ioctl.c\n\nReformat ext3/ioctl.c to make it look more like ext4/ioctl.c and remove\nthe BKL around ext3_ioctl().\n\nSigned-off-by: Cyrus Massoumi \u003ccyrusm@gmx.net\u003e\nCc: \u003clinux-ext4@vger.kernel.org\u003e\nAcked-by: Jan Kara \u003cjack@ucw.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "bfb9bcdbda9a61bca469bf899a589918c60c4c18", "tree": "40b28178c9d969c94e2039b27ac213cab5de0e79", "parents": [ "8a0cecffeb52363a57257bbbbd58f4c4537a75bb" ], "author": { "name": "Michael Buesch", "email": "mb@bu3sch.de", "time": "Thu Apr 02 16:57:07 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:51 2009 -0700" }, "message": "spi-gpio: allow operation without CS signal\n\nChange spi-gpio so that it is possible to drive SPI communications over\nGPIO without the need for a chipselect signal.\n\nThis is useful in very small setups where there\u0027s only one slave device\non the bus.\n\nThis patch does not affect existing setups.\n\nI use this for a tiny communication channel between an embedded device and\na microcontroller. There are not enough GPIOs available for chipselect\nand it\u0027s not needed anyway in this case.\n\nSigned-off-by: Michael Buesch \u003cmb@bu3sch.de\u003e\nCc: David Brownell \u003cdavid-b@pacbell.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "96615841e170f0108832e64a90d51b469573a472", "tree": "a815741cf06b44ac98ee3ac65ca8a546970c1a70", "parents": [ "c1c490e017b66b31f6559db9cbb51a3ce00cf639" ], "author": { "name": "Mike Rapoport", "email": "mike@compulab.co.il", "time": "Thu Apr 02 16:57:01 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:51 2009 -0700" }, "message": "rtc-v3020: add ability to access v3020 chip with GPIOs\n\nThe v3020 RTC can be connected to GPIOs as well as to memory-like\ninterface. Add ability to use GPIO bit-bang for v3020 read-write access.\n\n[akpm@linux-foundation.org: fix off-by-one in error path]\nSigned-off-by: Mike Rapoport \u003cmike@compulab.co.il\u003e\nAcked-by: Alessandro Zummo \u003ca.zummo@towertech.it\u003e\nCc: David Brownell \u003cdavid-b@pacbell.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6f2c55b843836d26528c56a0968689accaedbc67", "tree": "17501e29d4b6ef3eb85da9a5d6ad3df7f19ec6a2", "parents": [ "14dd1ff0f9e75dd4ae2f1ff8e48becb76d14f4ab" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Thu Apr 02 16:56:59 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:51 2009 -0700" }, "message": "Simplify copy_thread()\n\nFirst argument unused since 2.3.11.\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nCc: \u003clinux-arch@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": "14dd1ff0f9e75dd4ae2f1ff8e48becb76d14f4ab", "tree": "a9e208f0c35c8e24ed0edb8a1bc5ca9a4dc9b585", "parents": [ "7274ec8bd71e99018642f474528ea7de4bb3ae25" ], "author": { "name": "David Brownell", "email": "dbrownell@users.sourceforge.net", "time": "Thu Apr 02 16:56:58 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:50 2009 -0700" }, "message": "memory_accessor: implement the new memory_accessor interfaces for SPI EEPROMs\n\n- Define new setup() hook to export the accessor\n - Implement accessor methods\n\nMoves some error checking out of the sysfs interface code into the layer\nbelow it, which is now shared by both sysfs and memory access code.\n\nSigned-off-by: David Brownell \u003cdbrownell@users.sourceforge.net\u003e\nSigned-off-by: Kevin Hilman \u003ckhilman@deeprootsystems.com\u003e\nCc: Jean Delvare \u003ckhali@linux-fr.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7274ec8bd71e99018642f474528ea7de4bb3ae25", "tree": "3c2e719f696292afa0717f7111d174bdfc073f27", "parents": [ "06c421ee0d5af95c8c6749ca0ba620cd5010707f" ], "author": { "name": "Kevin Hilman", "email": "khilman@deeprootsystems.com", "time": "Thu Apr 02 16:56:57 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:50 2009 -0700" }, "message": "memory_accessor: implement the new memory_accessor interface for I2C EEPROM\n\nIn the case of at24, the platform code registers a \u0027setup\u0027 callback with\nthe at24_platform_data. When the at24 driver detects an EEPROM, it fills\nout the read and write functions of the memory_accessor and calls the\nsetup callback passing the memory_accessor struct. The platform code can\nthen use the read/write functions in the memory_accessor struct for\nreading and writing the EEPROM.\n\nSigned-off-by: Kevin Hilman \u003ckhilman@deeprootsystems.com\u003e\nCc: David Brownell \u003cdbrownell@users.sourceforge.net\u003e\nCc: Jean Delvare \u003ckhali@linux-fr.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "06c421ee0d5af95c8c6749ca0ba620cd5010707f", "tree": "e4b2cd412d7dd3081f8aaee88d77b1ab72b33b15", "parents": [ "bf6aede712334d7338d5c47a5ee5ba3883c82a61" ], "author": { "name": "Kevin Hilman", "email": "khilman@deeprootsystems.com", "time": "Thu Apr 02 16:56:56 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:50 2009 -0700" }, "message": "memory_accessor: new interface for reading/writing persistent memory\n\nAdd an interface by which other kernel code can read/write persistent\nmemory such as I2C or SPI EEPROMs, or devices which provide NVRAM. Use\ncases include storage of board-specific configuration data like Ethernet\naddresses and sensor calibrations.\n\nOriginal idea, review and improvement suggestions by David Brownell.\n\nAcked-by: David Brownell \u003cdbrownell@users.sourceforge.net\u003e\nSigned-off-by: Kevin Hilman \u003ckhilman@deeprootsystems.com\u003e\nCc: Jean Delvare \u003ckhali@linux-fr.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "bf6aede712334d7338d5c47a5ee5ba3883c82a61", "tree": "153483c5ef1de41f8dd3d233ba46117d0676c303", "parents": [ "e4c2ff1cf2d7fc65d0fc6f88bc98338e0212ad52" ], "author": { "name": "Jean Delvare", "email": "khali@linux-fr.org", "time": "Thu Apr 02 16:56:54 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:50 2009 -0700" }, "message": "workqueue: add to_delayed_work() helper function\n\nIt is a fairly common operation to have a pointer to a work and to need a\npointer to the delayed work it is contained in. In particular, all\ndelayed works which want to rearm themselves will have to do that. So it\nwould seem fair to offer a helper function for this operation.\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Jean Delvare \u003ckhali@linux-fr.org\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nCc: Herbert Xu \u003cherbert@gondor.apana.org.au\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: Greg KH \u003cgreg@kroah.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9a896c9a48ac6704c0ce8ee081b836644d0afe40", "tree": "681a5453326641cef362a53fb8e031af55ebc87d", "parents": [ "8e2c3795c78d5c4e2e1f14ce751e9d08decbe9d3" ], "author": { "name": "Lee Schermerhorn", "email": "Lee.Schermerhorn@hp.com", "time": "Thu Apr 02 16:56:45 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:49 2009 -0700" }, "message": "mm: define a UNIQUE value for AS_UNEVICTABLE flag\n\nA new \"address_space flag\"--AS_MM_ALL_LOCKS--was defined to use the next\navailable AS flag while the Unevictable LRU was under development. The\nUnevictable LRU was using the same flag and \"no one\" noticed. Current\nmainline, since 2.6.28, has same value for two symbolic flag names.\n\nSo, define a unique flag value for AS_UNEVICTABLE--up close to the other\nflags, [at the cost of an additional #ifdef] so we\u0027ll notice next time.\nNote that #ifdef is not actually required, if we don\u0027t mind having the\nunused flag value defined.\n\nReplace #defines with an enum.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: \u003cstable@kernel.org\u003e\t\t[2.6.28.x, 2.6.29.x]\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8e2c3795c78d5c4e2e1f14ce751e9d08decbe9d3", "tree": "15a86d7823b298636d812d953b0f607b53fda92b", "parents": [ "c90bfeb80f00c765a57f17442fea1a57756b9034" ], "author": { "name": "Eric Sandeen", "email": "sandeen@redhat.com", "time": "Thu Apr 02 16:56:44 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:49 2009 -0700" }, "message": "add fiemap.h to header-y\n\nInclude fiemap.h in header-y; it defines the interface for the\nFS_IOC_FIEMAP file mapping ioctl.\n\nSigned-off-by: Eric Sandeen \u003csandeen@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": "33e5d76979cf01e3834814fe0aea569d1d602c1a", "tree": "58a03e5da59db203245da10db144a4f6f61a83ba", "parents": [ "5482415a5ecc0cd791a5d885cc3db8281401078f" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Thu Apr 02 16:56:32 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:48 2009 -0700" }, "message": "nommu: fix a number of issues with the per-MM VMA patch\n\nFix a number of issues with the per-MM VMA patch:\n\n (1) Make mmap_pages_allocated an atomic_long_t, just in case this is used on\n a NOMMU system with more than 2G pages. Makes no difference on a 32-bit\n system.\n\n (2) Report vma-\u003evm_pgoff * PAGE_SIZE as a 64-bit value, not a 32-bit value,\n lest it overflow.\n\n (3) Move the allocation of the vm_area_struct slab back for fork.c.\n\n (4) Use KMEM_CACHE() for both vm_area_struct and vm_region slabs.\n\n (5) Use BUG_ON() rather than if () BUG().\n\n (6) Make the default validate_nommu_regions() a static inline rather than a\n #define.\n\n (7) Make free_page_series()\u0027s objection to pages with a refcount !\u003d 1 more\n informative.\n\n (8) Adjust the __put_nommu_region() banner comment to indicate that the\n semaphore must be held for writing.\n\n (9) Limit the number of warnings about munmaps of non-mmapped regions.\n\nReported-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nCc: Greg Ungerer \u003cgerg@snapgear.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ee3b4290aec03022cfb67c9adba9f1b3215245f0", "tree": "37130f5de4d5ccd2be4902dc3dec9ec6a371c2ed", "parents": [ "833bb3046b6cb320e775ea2160ddca87d53260d5" ], "author": { "name": "Akinobu Mita", "email": "akinobu.mita@gmail.com", "time": "Thu Apr 02 16:56:30 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:48 2009 -0700" }, "message": "generic debug pagealloc: build fix\n\nThis fixes a build failure with generic debug pagealloc:\n\n mm/debug-pagealloc.c: In function \u0027set_page_poison\u0027:\n mm/debug-pagealloc.c:8: error: \u0027struct page\u0027 has no member named \u0027debug_flags\u0027\n mm/debug-pagealloc.c: In function \u0027clear_page_poison\u0027:\n mm/debug-pagealloc.c:13: error: \u0027struct page\u0027 has no member named \u0027debug_flags\u0027\n mm/debug-pagealloc.c: In function \u0027page_poison\u0027:\n mm/debug-pagealloc.c:18: error: \u0027struct page\u0027 has no member named \u0027debug_flags\u0027\n mm/debug-pagealloc.c: At top level:\n mm/debug-pagealloc.c:120: error: redefinition of \u0027kernel_map_pages\u0027\n include/linux/mm.h:1278: error: previous definition of \u0027kernel_map_pages\u0027 was here\n mm/debug-pagealloc.c: In function \u0027kernel_map_pages\u0027:\n mm/debug-pagealloc.c:122: error: \u0027debug_pagealloc_enabled\u0027 undeclared (first use in this function)\n\nby fixing\n\n - debug_flags should be in struct page\n - define DEBUG_PAGEALLOC config option for all architectures\n\nSigned-off-by: Akinobu Mita \u003cakinobu.mita@gmail.com\u003e\nReported-by: Alexander Beregalov \u003ca.beregalov@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": "7513c2a761d69d2a93f17146b3563527d3618ba0", "tree": "375a14998a60a47b83962d5a497139112ec6e8e4", "parents": [ "b2a114652940ccf7e9668ad447ca78bf16a31139" ], "author": { "name": "Jonathan Brassow", "email": "jbrassow@redhat.com", "time": "Thu Apr 02 19:55:30 2009 +0100" }, "committer": { "name": "Alasdair G Kergon", "email": "agk@redhat.com", "time": "Thu Apr 02 19:55:30 2009 +0100" }, "message": "dm raid1: add is_remote_recovering hook for clusters\n\nThe logging API needs an extra function to make cluster mirroring\npossible. This new function allows us to check whether a mirror\nregion is being recovered on another machine in the cluster. This\nhelps us prevent simultaneous recovery I/O and process I/O to the\nsame locations on disk.\n\nCluster-aware log modules will implement this function. Single\nmachine log modules will not. So, there is no performance\npenalty for single machine mirrors.\n\nSigned-off-by: Jonathan Brassow \u003cjbrassow@redhat.com\u003e\nAcked-by: Heinz Mauelshagen \u003cheinzm@redhat.com\u003e\nSigned-off-by: Alasdair G Kergon \u003cagk@redhat.com\u003e\n" }, { "commit": "ec44ab9d6681ddf9026b593e866bec9c0e075e1d", "tree": "56c0f99068c7bf2a474e8094c1fa9d14a7861ae8", "parents": [ "84e67c9319eb2232757a022c24f6a461291eaee5" ], "author": { "name": "Mike Snitzer", "email": "snitzer@redhat.com", "time": "Thu Apr 02 19:55:30 2009 +0100" }, "committer": { "name": "Alasdair G Kergon", "email": "agk@redhat.com", "time": "Thu Apr 02 19:55:30 2009 +0100" }, "message": "dm log: remove struct dm_dirty_log_internal\n\nRemove the \u0027dm_dirty_log_internal\u0027 structure. The resulting cleanup\neliminates extra memory allocations. Therefore exposing the internal\nlist_head to the external \u0027dm_dirty_log_type\u0027 structure is a worthwhile\ncompromise.\n\nSigned-off-by: Mike Snitzer \u003csnitzer@redhat.com\u003e\nSigned-off-by: Alasdair G Kergon \u003cagk@redhat.com\u003e\n" }, { "commit": "45194e4f89fbdd97a2b7d2698c05f0b00c19e820", "tree": "70d35747228b84c1d7b7d76c5e18f72b16f412a3", "parents": [ "570b9d968bf9b16974252ef7cbce73fa6dac34f3" ], "author": { "name": "Cheng Renquan", "email": "crquan@gmail.com", "time": "Thu Apr 02 19:55:28 2009 +0100" }, "committer": { "name": "Alasdair G Kergon", "email": "agk@redhat.com", "time": "Thu Apr 02 19:55:28 2009 +0100" }, "message": "dm target: remove struct tt_internal\n\nThe tt_internal is really just a list_head to manage registered target_type\nin a double linked list,\n\nHere embed the list_head into target_type directly,\n1. to avoid kmalloc/kfree;\n2. then tt_internal is really unneeded;\n\nCc: stable@kernel.org\nSigned-off-by: Cheng Renquan \u003ccrquan@gmail.com\u003e\nSigned-off-by: Alasdair G Kergon \u003cagk@redhat.com\u003e\nReviewed-by: Alasdair G Kergon \u003cagk@redhat.com\u003e\n" }, { "commit": "eae6c2b6414fc6673ac5415442fe463c01005366", "tree": "b0c4feb65a31a33ae0cc1e1241406456f58d6b05", "parents": [ "4fe6e30645de0b7a179892d83049580bf72bcff2" ], "author": { "name": "Bartlomiej Zolnierkiewicz", "email": "bzolnier@gmail.com", "time": "Wed Apr 01 21:42:26 2009 +0200" }, "committer": { "name": "Bartlomiej Zolnierkiewicz", "email": "bzolnier@gmail.com", "time": "Wed Apr 01 21:42:26 2009 +0200" }, "message": "remove \u003clinux/ata.h\u003e include from \u003clinux/hdreg.h\u003e\n\nAll \u003clinux/hdreg.h\u003e users that need \u003clinux/ata.h\u003e have been fixed\nto include it directly.\n\nCc: Christoph Hellwig \u003chch@infradead.org\u003e\nSigned-off-by: Bartlomiej Zolnierkiewicz \u003cbzolnier@gmail.com\u003e\n" }, { "commit": "4fe6e30645de0b7a179892d83049580bf72bcff2", "tree": "e3c0d998a0b0c6383c0b93247bf5b722504675cc", "parents": [ "fcd3ec6960728ff7b4b598c62a68847aa03a94a5" ], "author": { "name": "Bartlomiej Zolnierkiewicz", "email": "bzolnier@gmail.com", "time": "Wed Apr 01 21:42:25 2009 +0200" }, "committer": { "name": "Bartlomiej Zolnierkiewicz", "email": "bzolnier@gmail.com", "time": "Wed Apr 01 21:42:25 2009 +0200" }, "message": "include/linux/hdreg.h: remove unused defines\n\n* Move HD_IRQ define to drivers/block/hd.c (only user).\n\n* Remove unused *_STAT, *_ERR, HD_*, CD, IO, REL and TAG_MASK defines.\n\nSigned-off-by: Bartlomiej Zolnierkiewicz \u003cbzolnier@gmail.com\u003e\n" }, { "commit": "dafd01cc14a38690c87981eb2670d9c95f799ffd", "tree": "f91e908f18177569fcb17ad6f628e862c5a3f1ad", "parents": [ "04b3ab52a000ab7e718efc97e9fdd67d95002d11" ], "author": { "name": "Bartlomiej Zolnierkiewicz", "email": "bzolnier@gmail.com", "time": "Wed Apr 01 21:42:25 2009 +0200" }, "committer": { "name": "Bartlomiej Zolnierkiewicz", "email": "bzolnier@gmail.com", "time": "Wed Apr 01 21:42:25 2009 +0200" }, "message": "include/linux/hdreg.h: cover WIN_* and friends with #ifndef/#endif __KERNEL__\n\nSigned-off-by: Bartlomiej Zolnierkiewicz \u003cbzolnier@gmail.com\u003e\n" }, { "commit": "6fd5c665d8fe9da5f2081f0b3ca8054f0f730b1a", "tree": "7592f6e3e6a884744dd378cdddd6334b1f60a427", "parents": [ "4aaf2fec718f6fbf38668edf733a0ab09a49cab1" ], "author": { "name": "Bartlomiej Zolnierkiewicz", "email": "bzolnier@gmail.com", "time": "Wed Apr 01 21:42:23 2009 +0200" }, "committer": { "name": "Bartlomiej Zolnierkiewicz", "email": "bzolnier@gmail.com", "time": "Wed Apr 01 21:42:23 2009 +0200" }, "message": "include/linux/hdreg.h: cover struct hd_driveid with #ifndef/#endif __KERNEL__\n\nSigned-off-by: Bartlomiej Zolnierkiewicz \u003cbzolnier@gmail.com\u003e\n" }, { "commit": "4fe70410d9a219dabb47328effccae7e7f2a6e26", "tree": "7f36d6cd27333fa28447f06ce37a6fecceb42955", "parents": [ "395d73413c5656c6d7706ae91dcb441f9b7e3074", "cc85906110e26fe8537c3bdbc08a74ae8110030b" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 10:58:42 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 10:58:42 2009 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.linux-nfs.org/projects/trondmy/nfs-2.6\n\n* \u0027for-linus\u0027 of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: (58 commits)\n SUNRPC: Ensure IPV6_V6ONLY is set on the socket before binding to a port\n NSM: Fix unaligned accesses in nsm_init_private()\n NFS: Simplify logic to compare socket addresses in client.c\n NFS: Start PF_INET6 callback listener only if IPv6 support is available\n lockd: Start PF_INET6 listener only if IPv6 support is available\n SUNRPC: Remove CONFIG_SUNRPC_REGISTER_V4\n SUNRPC: rpcb_register() should handle errors silently\n SUNRPC: Simplify kernel RPC service registration\n SUNRPC: Simplify svc_unregister()\n SUNRPC: Allow callers to pass rpcb_v4_register a NULL address\n SUNRPC: rpcbind actually interprets r_owner string\n SUNRPC: Clean up address type casts in rpcb_v4_register()\n SUNRPC: Don\u0027t return EPROTONOSUPPORT in svc_register()\u0027s helpers\n SUNRPC: Use IPv4 loopback for registering AF_INET6 kernel RPC services\n SUNRPC: Set IPV6ONLY flag on PF_INET6 RPC listener sockets\n NFS: Revert creation of IPv6 listeners for lockd and NFSv4 callbacks\n SUNRPC: Remove @family argument from svc_create() and svc_create_pooled()\n SUNRPC: Change svc_create_xprt() to take a @family argument\n SUNRPC: svc_setup_socket() gets protocol family from socket\n SUNRPC: Pass a family argument to svc_register()\n ...\n" }, { "commit": "395d73413c5656c6d7706ae91dcb441f9b7e3074", "tree": "7fadabe996f70d7918583fa2312d4fad19397fcb", "parents": [ "c226fd659fa7b6a7b038df5ae6856a68514bacde", "06705bff9114531a997a7d0c2520bea0f2927410" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 10:57:49 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 10:57:49 2009 -0700" }, "message": "Merge branch \u0027for_linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4\n\n* \u0027for_linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (33 commits)\n ext4: Regularize mount options\n ext4: fix locking typo in mballoc which could cause soft lockup hangs\n ext4: fix typo which causes a memory leak on error path\n jbd2: Update locking coments\n ext4: Rename pa_linear to pa_type\n ext4: add checks of block references for non-extent inodes\n ext4: Check for an valid i_mode when reading the inode from disk\n ext4: Use WRITE_SYNC for commits which are caused by fsync()\n ext4: Add auto_da_alloc mount option\n ext4: Use struct flex_groups to calculate get_orlov_stats()\n ext4: Use atomic_t\u0027s in struct flex_groups\n ext4: remove /proc tuning knobs\n ext4: Add sysfs support\n ext4: Track lifetime disk writes\n ext4: Fix discard of inode prealloc space with delayed allocation.\n ext4: Automatically allocate delay allocated blocks on rename\n ext4: Automatically allocate delay allocated blocks on close\n ext4: add EXT4_IOC_ALLOC_DA_BLKS ioctl\n ext4: Simplify delalloc code by removing mpage_da_writepages()\n ext4: Save stack space by removing fake buffer heads\n ...\n" }, { "commit": "cc85906110e26fe8537c3bdbc08a74ae8110030b", "tree": "891813098ede3dba4d5ff3b83b1f7b491367ad2f", "parents": [ "c09bca786ff941ed17c5f381c4eca5b106808c51", "c69da774b28e01e062e0a3aba7509f2dcfd2a11a" ], "author": { "name": "Trond Myklebust", "email": "Trond.Myklebust@netapp.com", "time": "Wed Apr 01 13:28:15 2009 -0400" }, "committer": { "name": "Trond Myklebust", "email": "Trond.Myklebust@netapp.com", "time": "Wed Apr 01 13:28:15 2009 -0400" }, "message": "Merge branch \u0027devel\u0027 into for-linus\n" }, { "commit": "c09bca786ff941ed17c5f381c4eca5b106808c51", "tree": "9b79a2f2d3ac441551c9c367f22e2240040c4ef6", "parents": [ "e76e5b2c663ac74ae6a542ac20795c625e36a5cd", "5b6c942dd1f13835eff8105ec2aa859544a1498d" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 10:02:15 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 10:02:15 2009 -0700" }, "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (59 commits)\n ide-floppy: do not complete rq\u0027s prematurely\n ide: be able to build pmac driver without IDE built-in\n ide-pmac: IDE cable detection on Apple PowerBook\n ide: inline SELECT_DRIVE()\n ide: turn selectproc() method into dev_select() method (take 5)\n MAINTAINERS: move old ide-{floppy,tape} entries to CREDITS (take 2)\n ide: move data register access out of tf_{read|load}() methods (take 2)\n ide: call {in|out}put_data() methods from tf_{read|load}() methods (take 2)\n ide-io-std: shorten ide_{in|out}put_data()\n ide: rename IDE_TFLAG_IN_[HOB_]FEATURE\n ide: turn set_irq() method into write_devctl() method\n ide: use ATA_HOB\n ide-disk: use ATA_ERR\n ide: add support for CFA specified transfer modes (take 3)\n ide-iops: only clear DMA words on setting DMA mode\n ide: identify data word 53 bit 1 doesn\u0027t cover words 62 and 63 (take 3)\n au1xxx-ide: auide_{in|out}sw() should be static\n ide-floppy: use ide_pio_bytes()\n ide-{floppy,tape}: fix padding for PIO transfers\n ide: remove CONFIG_BLK_DEV_IDEDOUBLER config option\n ...\n" }, { "commit": "e76e5b2c663ac74ae6a542ac20795c625e36a5cd", "tree": "2e7271be1f3a26832f4b121839fc4044fbbf27a6", "parents": [ "32527bc0e4b4fa7711ad1c923cf64ae72a7ffd9d", "eeafda70bf2807544e96fa4e52b2433cd470ff46" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 09:47:12 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 09:47:12 2009 -0700" }, "message": "Merge branch \u0027linux-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6\n\n* \u0027linux-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (88 commits)\n PCI: fix HT MSI mapping fix\n PCI: don\u0027t enable too much HT MSI mapping\n x86/PCI: make pci\u003dlastbus\u003d255 work when acpi is on\n PCI: save and restore PCIe 2.0 registers\n PCI: update fakephp for bus_id removal\n PCI: fix kernel oops on bridge removal\n PCI: fix conflict between SR-IOV and config space sizing\n powerpc/PCI: include pci.h in powerpc MSI implementation\n PCI Hotplug: schedule fakephp for feature removal\n PCI Hotplug: rename legacy_fakephp to fakephp\n PCI Hotplug: restore fakephp interface with complete reimplementation\n PCI: Introduce /sys/bus/pci/devices/.../rescan\n PCI: Introduce /sys/bus/pci/devices/.../remove\n PCI: Introduce /sys/bus/pci/rescan\n PCI: Introduce pci_rescan_bus()\n PCI: do not enable bridges more than once\n PCI: do not initialize bridges more than once\n PCI: always scan child buses\n PCI: pci_scan_slot() returns newly found devices\n PCI: don\u0027t scan existing devices\n ...\n\nFix trivial append-only conflict in Documentation/feature-removal-schedule.txt\n" }, { "commit": "6a7f2829b5f8be124e168265f176dbbbea8861a0", "tree": "e900d09ba43d9a7248725287a7658fa85e041332", "parents": [ "66c1ca019078220dc1bf968f2bb18421100ef147" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Tue Mar 31 15:25:19 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:29 2009 -0700" }, "message": "fbdev: uninline lock_fb_info()\n\nBefore:\n\n text data bss dec hex filename\n 3648 2910 32 6590 19be drivers/video/backlight/backlight.o\n 3226 2812 32 6070 17b6 drivers/video/backlight/lcd.o\n 30990 16688 8480 56158 db5e drivers/video/console/fbcon.o\n 15488 8400 24 23912 5d68 drivers/video/fbmem.o\n\nAfter:\n\n text data bss dec hex filename\n 3537 2870 32 6439 1927 drivers/video/backlight/backlight.o\n 3131 2772 32 5935 172f drivers/video/backlight/lcd.o\n 30876 16648 8480 56004 dac4 drivers/video/console/fbcon.o\n 15506 8400 24 23930 5d7a drivers/video/fbmem.o\n\nCc: Andrea Righi \u003crighi.andrea@gmail.com\u003e\nCc: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Krzysztof Helt \u003ckrzysztof.h1@poczta.fm\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "614c0dc93284404be2a4d5750c79bb95f2b6c980", "tree": "767a9412f5dcea630d2734fab7d9e8f4e393b38c", "parents": [ "dd14f71cc62dd07b588cc6de935155e6fd3911c9" ], "author": { "name": "Krzysztof Helt", "email": "krzysztof.h1@wp.pl", "time": "Tue Mar 31 15:25:15 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:29 2009 -0700" }, "message": "cirrusfb: add accelerator constant\n\nAdd an accelerator constant so almost all Cirrus are recognized as\naccelerators by the fbset command.\n\nSigned-off-by: Krzysztof Helt \u003ckrzysztof.h1@wp.pl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "78d89ef40c2ff7265df077e20c4d76be7d415204", "tree": "68503b0252682a496495b7adb46f6aa278db88ae", "parents": [ "47367a3ba425d70467af0009782098235ddbf204" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Tue Mar 31 15:24:48 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:24 2009 -0700" }, "message": "rtc: convert LEAP_YEAR into an inline\n\n- the LEAP_YEAR macro is buggy - it references its arg multiple times.\n Fix this by turning it into a C function.\n\n- give it a more approriate name\n\n- Move it to rtc.h so that other .c files can use it, instead of copying it.\n\nCc: dann frazier \u003cdannf@hp.com\u003e\nAcked-by: Alessandro Zummo \u003calessandro.zummo@towertech.it\u003e\nCc: stephane eranian \u003ceranian@googlemail.com\u003e\nCc: \"Luck, Tony\" \u003ctony.luck@intel.com\u003e\nCc: David Brownell \u003cdavid-b@pacbell.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "79955898f961a870cbcc58f6ae13f3741a909da5", "tree": "f1b1110446e7df4382f23eddd874ee875e4ed26d", "parents": [ "8f63aaa8b9239475fc580d4450f1141496655305" ], "author": { "name": "Ian Kent", "email": "raven@themaw.net", "time": "Tue Mar 31 15:24:45 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:23 2009 -0700" }, "message": "autofs4: fix kernel includes\n\nautofs_dev-ioctl.h is included by both the kernel module and user space tools\nand it includes two kernel header files. Compiles work if the kernel headers\nare installed but fail otherwise.\n\nSigned-off-by: Ian Kent \u003craven@themaw.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "35b4b3c0c1265f1a7342574be393c157601401f0", "tree": "ca12b33dbe911f1ba02cff197fcfb5928ab5763b", "parents": [ "364fdbc00fbdd409ade63500710123fe323aa164" ], "author": { "name": "Anton Vorontsov", "email": "avorontsov@ru.mvista.com", "time": "Tue Mar 31 15:24:37 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:22 2009 -0700" }, "message": "spi_mpc83xx: add OF platform driver bindings\n\nImplement full support for OF SPI bindings. Now the driver can manage its\nown chip selects without any help from the board files and/or fsl_soc\nconstructors.\n\nThe \"legacy\" code is well isolated and could be removed as time goes by.\n\nSigned-off-by: Anton Vorontsov \u003cavorontsov@ru.mvista.com\u003e\nCc: David Brownell \u003cdavid-b@pacbell.net\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Kumar Gala \u003cgalak@gate.crashing.org\u003e\nCc: Grant Likely \u003cgrant.likely@secretlab.ca\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "364fdbc00fbdd409ade63500710123fe323aa164", "tree": "0a2c4c85f5dd3b6e91ff5d68f419069178e5a9bb", "parents": [ "34c8a20c6ee6af25ee35da9ca15ba81faacfc73d" ], "author": { "name": "Anton Vorontsov", "email": "avorontsov@ru.mvista.com", "time": "Tue Mar 31 15:24:36 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:22 2009 -0700" }, "message": "spi_mpc83xx: rework chip selects handling\n\nThe main purpose of this patch is to pass \u0027struct spi_device\u0027 to the chip\nselect handling routines. This is needed so that we could implement\nfull-fledged OpenFirmware support for this driver.\n\nWhile at it, also:\n- Replace two {de,activate}_cs routines by single cs_contol().\n- Don\u0027t duplicate platform data callbacks in mpc83xx_spi struct.\n\nSigned-off-by: Anton Vorontsov \u003cavorontsov@ru.mvista.com\u003e\nCc: David Brownell \u003cdavid-b@pacbell.net\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Kumar Gala \u003cgalak@gate.crashing.org\u003e\nCc: Grant Likely \u003cgrant.likely@secretlab.ca\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c0da37753695e010776ccf2200a5731e0f88a9f3", "tree": "4bcc83b718a284808d01929b662ee95fb0c49e8b", "parents": [ "4ede816ac36e027db5fe0051ad9c73f76db63772" ], "author": { "name": "Davide Libenzi", "email": "davidel@xmailserver.org", "time": "Tue Mar 31 15:24:20 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:20 2009 -0700" }, "message": "epoll keyed wakeups: introduce new *_poll() wakeup macros\n\nIntroduce new wakeup macros that allow passing an event mask to the wakeup\ntargets. They exactly mimic their non-_poll() counterpart, with the added\nevent mask passing capability. I did add only the ones currently\nrequested, avoiding the _nr() and _all() for the moment.\n\nSigned-off-by: Davide Libenzi \u003cdavidel@xmailserver.org\u003e\nCc: Alan Cox \u003calan@lxorguk.ukuu.org.uk\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: William Lee Irwin III \u003cwli@movementarian.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4ede816ac36e027db5fe0051ad9c73f76db63772", "tree": "6c79eae26067c2355a2d4c7e65bca84208a76c40", "parents": [ "bcd0b235bf3808dec5115c381cd55568f63b85f0" ], "author": { "name": "Davide Libenzi", "email": "davidel@xmailserver.org", "time": "Tue Mar 31 15:24:20 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:20 2009 -0700" }, "message": "epoll keyed wakeups: add __wake_up_locked_key() and __wake_up_sync_key()\n\nThis patchset introduces wakeup hints for some of the most popular (from\nepoll POV) devices, so that epoll code can avoid spurious wakeups on its\nwaiters.\n\nThe problem with epoll is that the callback-based wakeups do not, ATM,\ncarry any information about the events the wakeup is related to. So the\nonly choice epoll has (not being able to call f_op-\u003epoll() from inside the\ncallback), is to add the file* to a ready-list and resolve the real events\nlater on, at epoll_wait() (or its own f_op-\u003epoll()) time. This can cause\nspurious wakeups, since the wake_up() itself might be for an event the\ncaller is not interested into.\n\nThe rate of these spurious wakeup can be pretty high in case of many\nnetwork sockets being monitored.\n\nBy allowing devices to report the events the wakeups refer to (at least\nthe two major classes - POLLIN/POLLOUT), we are able to spare useless\nwakeups by proper handling inside the epoll\u0027s poll callback.\n\nEpoll will have in any case to call f_op-\u003epoll() on the file* later on,\nsince the change to be done in order to have the full event set sent via\nwakeup, is too invasive for the way our f_op-\u003epoll() system works (the\nfull event set is calculated inside the poll function - there are too many\nof them to even start thinking the change - also poll/select would need\nchange too).\n\nEpoll is changed in a way that both devices which send event hints, and\nthe ones that don\u0027t, are correctly handled. The former will gain some\nefficiency though.\n\nAs a general rule for devices, would be to add an event mask by using\nkey-aware wakeup macros, when making up poll wait queues. I tested it\n(together with the epoll\u0027s poll fix patch Andrew has in -mm) and wakeups\nfor the supported devices are correctly filtered.\n\nTest program available here:\n\nhttp://www.xmailserver.org/epoll_test.c\n\nThis patch:\n\nNothing revolutionary here. Just using the available \"key\" that our\nwakeup core already support. The __wake_up_locked_key() was no brainer,\nsince both __wake_up_locked() and __wake_up_locked_key() are thin wrappers\naround __wake_up_common().\n\nThe __wake_up_sync() function had a body, so the choice was between\nborrowing the body for __wake_up_sync_key() and calling it from\n__wake_up_sync(), or make an inline and calling it from both. I chose the\nformer since in most archs it all resolves to \"mov $0, REG; jmp ADDR\".\n\nSigned-off-by: Davide Libenzi \u003cdavidel@xmailserver.org\u003e\nCc: Alan Cox \u003calan@lxorguk.ukuu.org.uk\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: William Lee Irwin III \u003cwli@movementarian.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "bcd0b235bf3808dec5115c381cd55568f63b85f0", "tree": "d73c4aa83dcd5321d2c48e070020576098b9705e", "parents": [ "4f0989dbfa8d18dd17c32120aac1eb3e906a62a2" ], "author": { "name": "Davide Libenzi", "email": "davidel@xmailserver.org", "time": "Tue Mar 31 15:24:18 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:20 2009 -0700" }, "message": "eventfd: improve support for semaphore-like behavior\n\nPeople started using eventfd in a semaphore-like way where before they\nwere using pipes.\n\nThat is, counter-based resource access. Where a \"wait()\" returns\nimmediately by decrementing the counter by one, if counter is greater than\nzero. Otherwise will wait. And where a \"post(count)\" will add count to\nthe counter releasing the appropriate amount of waiters. If eventfd the\n\"post\" (write) part is fine, while the \"wait\" (read) does not dequeue 1,\nbut the whole counter value.\n\nThe problem with eventfd is that a read() on the fd returns and wipes the\nwhole counter, making the use of it as semaphore a little bit more\ncumbersome. You can do a read() followed by a write() of COUNTER-1, but\nIMO it\u0027s pretty easy and cheap to make this work w/out extra steps. This\npatch introduces a new eventfd flag that tells eventfd to only dequeue 1\nfrom the counter, allowing simple read/write to make it behave like a\nsemaphore. Simple test here:\n\nhttp://www.xmailserver.org/eventfd-sem.c\n\nTo be back-compatible with earlier kernels, userspace applications should\nprobe for the availability of this feature via\n\n#ifdef EFD_SEMAPHORE\n\tfd \u003d eventfd2 (CNT, EFD_SEMAPHORE);\n\tif (fd \u003d\u003d -1 \u0026\u0026 errno \u003d\u003d EINVAL)\n\t\t\u003cfallback\u003e\n#else\n\t\t\u003cfallback\u003e\n#endif\n\nSigned-off-by: Davide Libenzi \u003cdavidel@xmailserver.org\u003e\nCc: \u003clinux-api@vger.kernel.org\u003e\nTested-by: Michael Kerrisk \u003cmtk.manpages@gmail.com\u003e\nCc: Ulrich Drepper \u003cdrepper@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": "311d07611e8b354cc1ee6546e4c574c01111adc8", "tree": "ec9cf9a12527a2239163b06ec61bad76ac2abadd", "parents": [ "acdd052a285a7b4cc7da4fa7d34ef9fd0a67b2f8" ], "author": { "name": "Cyrill Gorcunov", "email": "gorcunov@gmail.com", "time": "Tue Mar 31 15:23:51 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:18 2009 -0700" }, "message": "introduce pr_cont() macro\n\nWe cover all log-levels by pr_... macros except KERN_CONT one. Add it\nfor convenience.\n\nSigned-off-by: Cyrill Gorcunov \u003cgorcunov@openvz.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: \"H. Peter Anvin\" \u003chpa@zytor.com\u003e\nCc: Harvey Harrison \u003charvey.harrison@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": "c2d7543851849a6923680cdd7e1047ed1a84a1c5", "tree": "bf3038819d4be83a1d1e64d7b95bbb3d9d908544", "parents": [ "55a63998b8967615a15e2211ba0ff3a84a565824" ], "author": { "name": "Eric Sandeen", "email": "sandeen@redhat.com", "time": "Tue Mar 31 15:23:46 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:17 2009 -0700" }, "message": "filesystem freeze: allow SysRq emergency thaw to thaw frozen filesystems\n\nNow that the filesystem freeze operation has been elevated to the VFS, and\nis just an ioctl away, some sort of safety net for unintentionally frozen\nroot filesystems may be in order.\n\nThe timeout thaw originally proposed did not get merged, but perhaps\nsomething like this would be useful in emergencies.\n\nFor example, freeze /path/to/mountpoint may freeze your root filesystem if\nyou forgot that you had that unmounted.\n\nI chose \u0027j\u0027 as the last remaining character other than \u0027h\u0027 which is sort\nof reserved for help (because help is generated on any unknown character).\n\nI\u0027ve tested this on a non-root fs with multiple (nested) freezers, as well\nas on a system rendered unresponsive due to a frozen root fs.\n\n[randy.dunlap@oracle.com: emergency thaw only if CONFIG_BLOCK enabled]\nSigned-off-by: Eric Sandeen \u003csandeen@redhat.com\u003e\nCc: Takashi Sato \u003ct-sato@yk.jp.nec.com\u003e\nSigned-off-by: Randy Dunlap \u003crandy.dunlap@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": "53d6660836f233df66490707365ab177e5fb2bb4", "tree": "dad7eae486c0928af039f4bb47ee3dd7bb0ff87d", "parents": [ "65bd6a9bc7be3f5841dad12f77ce4b3210bd82c5" ], "author": { "name": "J. R. Okajima", "email": "hooanon05@yahoo.co.jp", "time": "Tue Mar 31 15:23:43 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:17 2009 -0700" }, "message": "loop: add ioctl to resize a loop device\n\nAdd the ability to \u0027resize\u0027 the loop device on the fly.\n\nOne practical application is a loop file with XFS filesystem, already\nmounted: You can easily enlarge the file (append some bytes) and then call\nioctl(fd, LOOP_SET_CAPACITY, new); The loop driver will learn about the\nnew size and you can use xfs_growfs later on, which will allow you to use\nfull capacity of the loop file without the need to unmount.\n\nTest app:\n\n#include \u003clinux/fs.h\u003e\n#include \u003clinux/loop.h\u003e\n#include \u003csys/ioctl.h\u003e\n#include \u003csys/stat.h\u003e\n#include \u003csys/types.h\u003e\n#include \u003cassert.h\u003e\n#include \u003cerrno.h\u003e\n#include \u003cfcntl.h\u003e\n#include \u003cstdio.h\u003e\n#include \u003cstdlib.h\u003e\n#include \u003cunistd.h\u003e\n\n#define _GNU_SOURCE\n#include \u003cgetopt.h\u003e\n\nchar *me;\n\nvoid usage(FILE *f)\n{\n\tfprintf(f, \"%s [options] loop_dev [backend_file]\\n\"\n\t\t\"-s, --set new_size_in_bytes\\n\"\n\t\t\"\\twhen backend_file is given, \"\n\t\t\"it will be expanded too while keeping the original contents\\n\",\n\t\tme);\n}\n\nstruct option opts[] \u003d {\n\t{\n\t\t.name\t\t\u003d \"set\",\n\t\t.has_arg\t\u003d 1,\n\t\t.flag\t\t\u003d NULL,\n\t\t.val\t\t\u003d \u0027s\u0027\n\t},\n\t{\n\t\t.name\t\t\u003d \"help\",\n\t\t.has_arg\t\u003d 0,\n\t\t.flag\t\t\u003d NULL,\n\t\t.val\t\t\u003d \u0027h\u0027\n\t}\n};\n\nvoid err_size(char *name, __u64 old)\n{\n\tfprintf(stderr, \"size must be larger than current %s (%llu)\\n\",\n\t\tname, old);\n}\n\nint main(int argc, char *argv[])\n{\n\tint fd, err, c, i, bfd;\n\tssize_t ssz;\n\tsize_t sz;\n\t__u64 old, new, append;\n\tchar a[BUFSIZ];\n\tstruct stat st;\n\tFILE *out;\n\tchar *backend, *dev;\n\n\terr \u003d EINVAL;\n\tout \u003d stderr;\n\tme \u003d argv[0];\n\tnew \u003d 0;\n\twhile ((c \u003d getopt_long(argc, argv, \"s:h\", opts, \u0026i)) !\u003d -1) {\n\t\tswitch (c) {\n\t\tcase \u0027s\u0027:\n\t\t\terrno \u003d 0;\n\t\t\tnew \u003d strtoull(optarg, NULL, 0);\n\t\t\tif (errno) {\n\t\t\t\terr \u003d errno;\n\t\t\t\tperror(argv[i]);\n\t\t\t\tgoto out;\n\t\t\t}\n\t\t\tbreak;\n\n\t\tcase \u0027h\u0027:\n\t\t\terr \u003d 0;\n\t\t\tout \u003d stdout;\n\t\t\tgoto err;\n\n\t\tdefault:\n\t\t\tperror(argv[i]);\n\t\t\tgoto err;\n\t\t}\n\t}\n\n\tif (optind \u003c argc)\n\t\tdev \u003d argv[optind++];\n\telse\n\t\tgoto err;\n\n\tfd \u003d open(dev, O_RDONLY);\n\tif (fd \u003c 0) {\n\t\terr \u003d errno;\n\t\tperror(dev);\n\t\tgoto out;\n\t}\n\n\terr \u003d ioctl(fd, BLKGETSIZE64, \u0026old);\n\tif (err) {\n\t\terr \u003d errno;\n\t\tperror(\"ioctl BLKGETSIZE64\");\n\t\tgoto out;\n\t}\n\n\tif (!new) {\n\t\tprintf(\"%llu\\n\", old);\n\t\tgoto out;\n\t}\n\n\tif (new \u003c old) {\n\t\terr \u003d EINVAL;\n\t\terr_size(dev, old);\n\t\tgoto out;\n\t}\n\n\tif (optind \u003c argc) {\n\t\tbackend \u003d argv[optind++];\n\t\tbfd \u003d open(backend, O_WRONLY|O_APPEND);\n\t\tif (bfd \u003c 0) {\n\t\t\terr \u003d errno;\n\t\t\tperror(backend);\n\t\t\tgoto out;\n\t\t}\n\t\terr \u003d fstat(bfd, \u0026st);\n\t\tif (err) {\n\t\t\terr \u003d errno;\n\t\t\tperror(backend);\n\t\t\tgoto out;\n\t\t}\n\t\tif (new \u003c st.st_size) {\n\t\t\terr \u003d EINVAL;\n\t\t\terr_size(backend, st.st_size);\n\t\t\tgoto out;\n\t\t}\n\t\tappend \u003d new - st.st_size;\n\t\tsz \u003d sizeof(a);\n\t\twhile (append \u003e 0) {\n\t\t\tif (append \u003c sz)\n\t\t\t\tsz \u003d append;\n\t\t\tssz \u003d write(bfd, a, sz);\n\t\t\tif (ssz !\u003d sz) {\n\t\t\t\terr \u003d errno;\n\t\t\t\tperror(backend);\n\t\t\t\tgoto out;\n\t\t\t}\n\t\t\tappend -\u003d sz;\n\t\t}\n\t\terr \u003d fsync(bfd);\n\t\tif (err) {\n\t\t\terr \u003d errno;\n\t\t\tperror(backend);\n\t\t\tgoto out;\n\t\t}\n\t}\n\n\terr \u003d ioctl(fd, LOOP_SET_CAPACITY, new);\n\tif (err) {\n\t\terr \u003d errno;\n\t\tperror(\"ioctl LOOP_SET_CAPACITY\");\n\t}\n\tgoto out;\n\n err:\n\tusage(out);\n out:\n\treturn err;\n}\n\nSigned-off-by: J. R. Okajima \u003chooanon05@yahoo.co.jp\u003e\nSigned-off-by: Tomas Matejicek \u003ctomas@slax.org\u003e\nCc: \u003cutil-linux-ng@vger.kernel.org\u003e\nCc: Karel Zak \u003ckzak@redhat.com\u003e\nCc: Jens Axboe \u003cjens.axboe@oracle.com\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nCc: Akinobu Mita \u003cakinobu.mita@gmail.com\u003e\nCc: \u003clinux-api@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": "a8af78982ff4c0b3731527b0217d286a343a3089", "tree": "10f0ebe13c999dd54efdf79ff606b65e7952b69d", "parents": [ "5f0e3da6e186598bbd2569410ab60fa645ba00c9" ], "author": { "name": "Magnus Damm", "email": "damm@igel.co.jp", "time": "Tue Mar 31 15:23:37 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:16 2009 -0700" }, "message": "pm: rework includes, remove arch ifdefs\n\nMake the following header file changes:\n\n - remove arch ifdefs and asm/suspend.h from linux/suspend.h\n - add asm/suspend.h to disk.c (for arch_prepare_suspend())\n - add linux/io.h to swsusp.c (for ioremap())\n - x86 32/64 bit compile fixes\n\nSigned-off-by: Magnus Damm \u003cdamm@igel.co.jp\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nAcked-by: \"Rafael J. Wysocki\" \u003crjw@sisk.pl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9fab5619bdd7f84cdd22cc760778f759f9819a33", "tree": "4a7010f3ba43896c266032f8b287d6bd55b72c85", "parents": [ "327c0e968645f2601a43f5ea7c19c7b3a5fa0a34" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Tue Mar 31 15:23:33 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:15 2009 -0700" }, "message": "shmem: writepage directly to swap\n\nSynopsis: if shmem_writepage calls swap_writepage directly, most shmem\nswap loads benefit, and a catastrophic interaction between SLUB and some\nflash storage is avoided.\n\nshmem_writepage() has always been peculiar in making no attempt to write:\nit has just transferred a shmem page from file cache to swap cache, then\nlet that page make its way around the LRU again before being written and\nfreed.\n\nThe idea was that people use tmpfs because they want those pages to stay\nin RAM; so although we give it an overflow to swap, we should resist\nwriting too soon, giving those pages a second chance before they can be\nreclaimed.\n\nThat was always questionable, and I\u0027ve toyed with this patch for years;\nbut never had a clear justification to depart from the original design.\n\nIt became more questionable in 2.6.28, when the split LRU patches classed\nshmem and tmpfs pages as SwapBacked rather than as file_cache: that in\nitself gives them more resistance to reclaim than normal file pages. I\nprepared this patch for 2.6.29, but the merge window arrived before I\u0027d\ncompleted gathering statistics to justify sending it in.\n\nThen while comparing SLQB against SLUB, running SLUB on a laptop I\u0027d\nhabitually used with SLAB, I found SLUB to run my tmpfs kbuild swapping\ntests five times slower than SLAB or SLQB - other machines slower too, but\nnowhere near so bad. Simpler \"cp -a\" swapping tests showed the same.\n\nslub_max_order\u003d0 brings sanity to all, but heavy swapping is too far from\nnormal to justify such a tuning. The crucial factor on that laptop turns\nout to be that I\u0027m using an SD card for swap. What happens is this:\n\nBy default, SLUB uses order-2 pages for shmem_inode_cache (and many other\nfs inodes), so creating tmpfs files under memory pressure brings lumpy\nreclaim into play. One subpage of the order is chosen from the bottom of\nthe LRU as usual, then the other three picked out from their random\npositions on the LRUs.\n\nIn a tmpfs load, many of these pages will be ones which already passed\nthrough shmem_writepage, so already have swap allocated. And though their\noffsets on swap were probably allocated sequentially, now that the pages\nare picked off at random, their swap offsets are scattered.\n\nBut the flash storage on the SD card is very sensitive to having its\nwrites merged: once swap is written at scattered offsets, performance\nfalls apart. Rotating disk seeks increase too, but less disastrously.\n\nSo: stop giving shmem/tmpfs pages a second pass around the LRU, write them\nout to swap as soon as their swap has been allocated.\n\nIt\u0027s surely possible to devise an artificial load which runs faster the\nold way, one whose sizing is such that the tmpfs pages on their second\npass are the ones that are wanted again, and other pages not.\n\nBut I\u0027ve not yet found such a load: on all machines, under the loads I\u0027ve\ntried, immediate swap_writepage speeds up shmem swapping: especially when\nusing the SLUB allocator (and more effectively than slub_max_order\u003d0), but\nalso with the others; and it also reduces the variance between runs. How\nmuch faster varies widely: a factor of five is rare, 5% is common.\n\nOne load which might have suffered: imagine a swapping shmem load in a\nlimited mem_cgroup on a machine with plenty of memory. Before 2.6.29 the\nswapcache was not charged, and such a load would have run quickest with\nthe shmem swapcache never written to swap. But now swapcache is charged,\nso even this load benefits from shmem_writepage directly to swap.\n\nApologies for the #ifndef CONFIG_SWAP swap_writepage() stub in swap.h:\nit\u0027s silly because that will never get called; but refactoring shmem.c\nsensibly according to CONFIG_SWAP will be a separate task.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nAcked-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nAcked-by: 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" } ], "next": "327c0e968645f2601a43f5ea7c19c7b3a5fa0a34" }