)]}'
{
  "log": [
    {
      "commit": "2a38ada0f1ab9f894eea4428731ebc811b51c3f3",
      "tree": "759c765808a23a3a35e4ba10d8306c847c0205b7",
      "parents": [
        "19218e895cefdd389c96af12c93c89e7276bbaad",
        "44d19f5a04ae4e433548ba2f25e4d2ccfcac765e"
      ],
      "author": {
        "name": "Ethan Chen",
        "email": "intervigil@gmail.com",
        "time": "Sun Dec 08 12:50:38 2013 -0800"
      },
      "committer": {
        "name": "Ethan Chen",
        "email": "intervigil@gmail.com",
        "time": "Sun Dec 08 12:50:38 2013 -0800"
      },
      "message": "Merge tag \u0027v3.4.72\u0027 into tmp\n\nThis is the 3.4.72 stable release\n\nConflicts:\n\tarch/arm/Kconfig\n\tarch/arm/include/asm/mutex.h\n\tarch/arm/kernel/perf_event.c\n\tarch/arm/kernel/traps.c\n\tarch/arm/mm/dma-mapping.c\n\tdrivers/base/power/main.c\n\tdrivers/bluetooth/ath3k.c\n\tdrivers/bluetooth/btusb.c\n\tdrivers/gpu/drm/radeon/radeon_mode.h\n\tdrivers/mmc/card/block.c\n\tdrivers/mmc/host/sdhci.c\n\tdrivers/usb/core/message.c\n\tdrivers/usb/host/xhci-plat.c\n\tdrivers/usb/host/xhci.h\n\tdrivers/virtio/virtio_ring.c\n\tfs/ubifs/dir.c\n\tinclude/linux/freezer.h\n\tinclude/linux/virtio.h\n\tinclude/media/v4l2-ctrls.h\n\tinclude/net/bluetooth/hci_core.h\n\tinclude/net/bluetooth/mgmt.h\n\tkernel/cgroup.c\n\tkernel/futex.c\n\tkernel/signal.c\n\tnet/bluetooth/hci_conn.c\n\tnet/bluetooth/hci_core.c\n\tnet/bluetooth/hci_event.c\n\tnet/bluetooth/l2cap_core.c\n\tnet/bluetooth/mgmt.c\n\tnet/bluetooth/rfcomm/sock.c\n\tnet/bluetooth/smp.c\n\nChange-Id: I4fb0d5de74ca76f933d95d98e1a9c2c859402f34\n"
    },
    {
      "commit": "f22ff9d05def87a049c5c8c7b86539bd4f8e3172",
      "tree": "ed805b8838b5cf2d7686345c8859eeb1f8d48901",
      "parents": [
        "df4011e050b4e80165a317424e6b3367dfa7697c"
      ],
      "author": {
        "name": "Fan Du",
        "email": "fan.du@windriver.com",
        "time": "Tue Apr 30 15:27:27 2013 -0700"
      },
      "committer": {
        "name": "Greg Kroah-Hartman",
        "email": "gregkh@linuxfoundation.org",
        "time": "Fri Nov 29 10:50:33 2013 -0800"
      },
      "message": "include/linux/fs.h: disable preempt when acquire i_size_seqcount write lock\n\ncommit 74e3d1e17b2e11d175970b85acd44f5927000ba2 upstream.\n\nTwo rt tasks bind to one CPU core.\n\nThe higher priority rt task A preempts a lower priority rt task B which\nhas already taken the write seq lock, and then the higher priority rt\ntask A try to acquire read seq lock, it\u0027s doomed to lockup.\n\nrt task A with lower priority: call write\ni_size_write                                        rt task B with higher priority: call sync, and preempt task A\n  write_seqcount_begin(\u0026inode-\u003ei_size_seqcount);    i_size_read\n  inode-\u003ei_size \u003d i_size;                             read_seqcount_begin \u003c-- lockup here...\n\nSo disable preempt when acquiring every i_size_seqcount *write* lock will\ncure the problem.\n\nSigned-off-by: Fan Du \u003cfan.du@windriver.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Zhao Hongjiang \u003czhaohongjiang@huawei.com\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@linuxfoundation.org\u003e\n\n"
    },
    {
      "commit": "f132c6cf77251e011e1dad0ec88c0b1fda16d5aa",
      "tree": "f04b469a3547a19b7bdbe110adc571eb71c93328",
      "parents": [
        "23016defd7db701a01dc49f972ad6b1bae9651c2",
        "3f6240f3e4e2608caf1a70d614ada658cbcbe7be"
      ],
      "author": {
        "name": "Steve Muckle",
        "email": "smuckle@codeaurora.org",
        "time": "Wed Jun 06 18:30:57 2012 -0700"
      },
      "committer": {
        "name": "Steve Muckle",
        "email": "smuckle@codeaurora.org",
        "time": "Wed Jun 06 18:45:28 2012 -0700"
      },
      "message": "Merge commit \u0027AU_LINUX_ANDROID_ICS.04.00.04.00.126\u0027 into msm-3.4\n\nAU_LINUX_ANDROID_ICS.04.00.04.00.126 from msm-3.0.\nFirst parent is from google/android-3.4.\n\n* commit \u0027AU_LINUX_ANDROID_ICS.04.00.04.00.126\u0027: (8712 commits)\n  PRNG: Device tree entry for qrng device.\n  vidc:1080p: Set video core timeout value for Thumbnail mode\n  msm: sps: improve the debugging support in SPS driver\n  board-8064 msm: Overlap secure and non secure video firmware heaps.\n  msm: clock: Add handoff ops for 7x30 and copper XO clocks\n  msm_fb: display: Wait for external vsync before DTV IOMMU unmap\n  msm: Fix ciruclar dependency in debug UART settings\n  msm: gdsc: Add GDSC regulator driver for msm-copper\n  defconfig: Enable Mobicore Driver.\n  mobicore: Add mobicore driver.\n  mobicore: rename variable to lower case.\n  mobicore: rename folder.\n  mobicore: add makefiles\n  mobicore: initial import of kernel driver\n  ASoC: msm: Add SLIMBUS_2_RX CPU DAI\n  board-8064-gpio: Update FUNC for EPM SPI CS\n  msm_fb: display: Remove chicken bit config during video playback\n  mmc: msm_sdcc: enable the sanitize capability\n  msm-fb: display: lm2 writeback support on mpq platfroms\n  msm_fb: display: Disable LVDS phy \u0026 pll during panel off\n  ...\n\nSigned-off-by: Steve Muckle \u003csmuckle@codeaurora.org\u003e\n"
    },
    {
      "commit": "73937f5face75e05ec2a72966d04f4e20aa18379",
      "tree": "f3c12b4daec9f72dbecc33001f33ee210c046fec",
      "parents": [
        "3063b5a519b392dd13afd2ffe820eba312db2759"
      ],
      "author": {
        "name": "Maya Erez",
        "email": "merez@codeaurora.org",
        "time": "Thu May 24 23:33:05 2012 +0300"
      },
      "committer": {
        "name": "Maya Erez",
        "email": "merez@codeaurora.org",
        "time": "Thu May 24 23:33:05 2012 +0300"
      },
      "message": "block: ioctl support for sanitize in eMMC 4.5\n\nAdding a new ioctl to support sanitize operation in eMMC\ncards version 4.5.\nThe sanitize ioctl support helps performing this operation\nvia user application.\n\nChange-Id: I79aa4163e7753a75bed5a26a9a92de902b4b9c21\nSigned-off-by: Yaniv Gardi \u003cygardi@codeaurora.org\u003e\nSigned-off-by: Maya Erez \u003cmerez@codeaurora.org\u003e\n"
    },
    {
      "commit": "080399aaaf3531f5b8761ec0ac30ff98891e8686",
      "tree": "28ba8f41bb67a58992bc426dac7002983bc64e8f",
      "parents": [
        "a09ba13eefb155a00d8d50008a0c0a2406985ddd"
      ],
      "author": {
        "name": "Jeff Moyer",
        "email": "jmoyer@redhat.com",
        "time": "Fri May 11 16:34:10 2012 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "axboe@kernel.dk",
        "time": "Fri May 11 16:42:14 2012 +0200"
      },
      "message": "block: don\u0027t mark buffers beyond end of disk as mapped\n\nHi,\n\nWe have a bug report open where a squashfs image mounted on ppc64 would\nexhibit errors due to trying to read beyond the end of the disk.  It can\neasily be reproduced by doing the following:\n\n[root@ibm-p750e-02-lp3 ~]# ls -l install.img\n-rw-r--r-- 1 root root 142032896 Apr 30 16:46 install.img\n[root@ibm-p750e-02-lp3 ~]# mount -o loop ./install.img /mnt/test\n[root@ibm-p750e-02-lp3 ~]# dd if\u003d/dev/loop0 of\u003d/dev/null\ndd: reading `/dev/loop0\u0027: Input/output error\n277376+0 records in\n277376+0 records out\n142016512 bytes (142 MB) copied, 0.9465 s, 150 MB/s\n\nIn dmesg, you\u0027ll find the following:\n\nsquashfs: version 4.0 (2009/01/31) Phillip Lougher\n[   43.106012] attempt to access beyond end of device\n[   43.106029] loop0: rw\u003d0, want\u003d277410, limit\u003d277408\n[   43.106039] Buffer I/O error on device loop0, logical block 138704\n[   43.106053] attempt to access beyond end of device\n[   43.106057] loop0: rw\u003d0, want\u003d277412, limit\u003d277408\n[   43.106061] Buffer I/O error on device loop0, logical block 138705\n[   43.106066] attempt to access beyond end of device\n[   43.106070] loop0: rw\u003d0, want\u003d277414, limit\u003d277408\n[   43.106073] Buffer I/O error on device loop0, logical block 138706\n[   43.106078] attempt to access beyond end of device\n[   43.106081] loop0: rw\u003d0, want\u003d277416, limit\u003d277408\n[   43.106085] Buffer I/O error on device loop0, logical block 138707\n[   43.106089] attempt to access beyond end of device\n[   43.106093] loop0: rw\u003d0, want\u003d277418, limit\u003d277408\n[   43.106096] Buffer I/O error on device loop0, logical block 138708\n[   43.106101] attempt to access beyond end of device\n[   43.106104] loop0: rw\u003d0, want\u003d277420, limit\u003d277408\n[   43.106108] Buffer I/O error on device loop0, logical block 138709\n[   43.106112] attempt to access beyond end of device\n[   43.106116] loop0: rw\u003d0, want\u003d277422, limit\u003d277408\n[   43.106120] Buffer I/O error on device loop0, logical block 138710\n[   43.106124] attempt to access beyond end of device\n[   43.106128] loop0: rw\u003d0, want\u003d277424, limit\u003d277408\n[   43.106131] Buffer I/O error on device loop0, logical block 138711\n[   43.106135] attempt to access beyond end of device\n[   43.106139] loop0: rw\u003d0, want\u003d277426, limit\u003d277408\n[   43.106143] Buffer I/O error on device loop0, logical block 138712\n[   43.106147] attempt to access beyond end of device\n[   43.106151] loop0: rw\u003d0, want\u003d277428, limit\u003d277408\n[   43.106154] Buffer I/O error on device loop0, logical block 138713\n[   43.106158] attempt to access beyond end of device\n[   43.106162] loop0: rw\u003d0, want\u003d277430, limit\u003d277408\n[   43.106166] attempt to access beyond end of device\n[   43.106169] loop0: rw\u003d0, want\u003d277432, limit\u003d277408\n...\n[   43.106307] attempt to access beyond end of device\n[   43.106311] loop0: rw\u003d0, want\u003d277470, limit\u003d2774\n\nSquashfs manages to read in the end block(s) of the disk during the\nmount operation.  Then, when dd reads the block device, it leads to\nblock_read_full_page being called with buffers that are beyond end of\ndisk, but are marked as mapped.  Thus, it would end up submitting read\nI/O against them, resulting in the errors mentioned above.  I fixed the\nproblem by modifying init_page_buffers to only set the buffer mapped if\nit fell inside of i_size.\n\nCheers,\nJeff\n\nSigned-off-by: Jeff Moyer \u003cjmoyer@redhat.com\u003e\nAcked-by: Nick Piggin \u003cnpiggin@kernel.dk\u003e\n\n--\n\nChanges from v1-\u003ev2: re-used max_block, as suggested by Nick Piggin.\nSigned-off-by: Jens Axboe \u003caxboe@kernel.dk\u003e\n"
    },
    {
      "commit": "5d32c88f0b94061b3af2e3ade92422407282eb12",
      "tree": "2e1f81aa47b2cf59625c8fba17199617e33802e6",
      "parents": [
        "43f63c8711ce02226b7bbdafeba7b8031faf3fb4",
        "dac23b0d0513916498d40412818bd2c581b365f7"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Apr 05 15:30:34 2012 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Apr 05 15:30:34 2012 -0700"
      },
      "message": "Merge branch \u0027akpm\u0027 (Andrew\u0027s patch-bomb)\n\nMerge batch of fixes from Andrew Morton:\n \"The simple_open() cleanup was held back while I wanted for laggards to\n  merge things.\n\n  I still need to send a few checkpoint/restore patches.  I\u0027ve been\n  wobbly about merging them because I\u0027m wobbly about the overall\n  prospects for success of the project.  But after speaking with Pavel\n  at the LSF conference, it sounds like they\u0027re further toward\n  completion than I feared - apparently davem is at the \"has stopped\n  complaining\" stage regarding the net changes.  So I need to go back\n  and re-review those patchs and their (lengthy) discussion.\"\n\n* emailed from Andrew Morton \u003cakpm@linux-foundation.org\u003e: (16 patches)\n  memcg swap: use mem_cgroup_uncharge_swap fix\n  backlight: add driver for DA9052/53 PMIC v1\n  C6X: use set_current_blocked() and block_sigmask()\n  MAINTAINERS: add entry for sparse checker\n  MAINTAINERS: fix REMOTEPROC F: typo\n  alpha: use set_current_blocked() and block_sigmask()\n  simple_open: automatically convert to simple_open()\n  scripts/coccinelle/api/simple_open.cocci: semantic patch for simple_open()\n  libfs: add simple_open()\n  hugetlbfs: remove unregister_filesystem() when initializing module\n  drivers/rtc/rtc-88pm860x.c: fix rtc irq enable callback\n  fs/xattr.c:setxattr(): improve handling of allocation failures\n  fs/xattr.c:listxattr(): fall back to vmalloc() if kmalloc() failed\n  fs/xattr.c: suppress page allocation failure warnings from sys_listxattr()\n  sysrq: use SEND_SIG_FORCED instead of force_sig()\n  proc: fix mount -t proc -o AAA\n"
    },
    {
      "commit": "20955e891d828b2027281fe3295dae6af8e0423b",
      "tree": "551b8b4a3515f3b99e357e8cef5bc2e5d5051d50",
      "parents": [
        "7563ec4c211ba59c2331dc6b94a068250345c387"
      ],
      "author": {
        "name": "Stephen Boyd",
        "email": "sboyd@codeaurora.org",
        "time": "Thu Apr 05 14:25:09 2012 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Apr 05 15:25:50 2012 -0700"
      },
      "message": "libfs: add simple_open()\n\ndebugfs and a few other drivers use an open-coded version of\nsimple_open() to pass a pointer from the file to the read/write file\nops.  Add support for this simple case to libfs so that we can remove\nthe many duplicate copies of this simple function.\n\nSigned-off-by: Stephen Boyd \u003csboyd@codeaurora.org\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Julia Lawall \u003cJulia.Lawall@lip6.fr\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "66189be74ff5f9f3fd6444315b85be210d07cef2",
      "tree": "7a179ddd7e233668dbb108faf847ceb768d2e92c",
      "parents": [
        "9ebb389d0a03b4415fe9014f6922a2412cb1109c"
      ],
      "author": {
        "name": "Pavel Shilovsky",
        "email": "piastry@etersoft.ru",
        "time": "Wed Mar 28 21:56:19 2012 +0400"
      },
      "committer": {
        "name": "Steve French",
        "email": "sfrench@us.ibm.com",
        "time": "Sun Apr 01 13:54:27 2012 -0500"
      },
      "message": "CIFS: Fix VFS lock usage for oplocked files\n\nWe can deadlock if we have a write oplock and two processes\nuse the same file handle. In this case the first process can\u0027t\nunlock its lock if the second process blocked on the lock in the\nsame time.\n\nFix it by using posix_lock_file rather than posix_lock_file_wait\nunder cinode-\u003elock_mutex. If we request a blocking lock and\nposix_lock_file indicates that there is another lock that prevents\nus, wait untill that lock is released and restart our call.\n\nCc: stable@kernel.org\nAcked-by: Jeff Layton \u003cjlayton@redhat.com\u003e\nSigned-off-by: Pavel Shilovsky \u003cpiastry@etersoft.ru\u003e\nSigned-off-by: Steve French \u003csfrench@us.ibm.com\u003e\n"
    },
    {
      "commit": "a76e99abc558aed633ba28ff61c5328116292bf3",
      "tree": "60f7677f0baafa00825accc1214839246b3e78dd",
      "parents": [
        "a54734678ff9cb97938b9f7648547174f3b118e4",
        "1d05f993784973189395051cc711fdd6dd5eb389"
      ],
      "author": {
        "name": "Rohit Vaswani",
        "email": "rvaswani@codeaurora.org",
        "time": "Fri Mar 30 00:09:34 2012 -0700"
      },
      "committer": {
        "name": "Rohit Vaswani",
        "email": "rvaswani@codeaurora.org",
        "time": "Fri Mar 30 00:09:34 2012 -0700"
      },
      "message": "Merge branch \u0027Linux 3.0.21\u0027 into msm-3.0\n\nMerge Upstream\u0027s stable 3.0.21 branch into msm-3.0\nThis consists 814 commits and some merge conflicts.\n\nThe merge conflicts are because of some local changes to\nmsm-3.0 as well as some conflicts between google\u0027s tree and\nthe upstream tree.\n\nConflicts:\n\tarch/arm/kernel/head.S\n\tdrivers/bluetooth/ath3k.c\n\tdrivers/bluetooth/btusb.c\n\tdrivers/mmc/core/core.c\n\tdrivers/tty/serial/serial_core.c\n\tdrivers/usb/host/ehci-hub.c\n\tdrivers/usb/serial/qcserial.c\n\tfs/namespace.c\n\tfs/proc/base.c\n\nChange-Id: I62e2edbe213f84915e27f8cd6e4f6ce23db22a21\nSigned-off-by: Rohit Vaswani \u003crvaswani@codeaurora.org\u003e\n"
    },
    {
      "commit": "71db34fc4330f7c784397acb9f1e6ee7f7b32eb2",
      "tree": "77dd08f6f778a799dcd0c48eb72d0742349df235",
      "parents": [
        "50483c3268918ee51a56d1baa39b9149d2d0d521",
        "797a9d797f8483bb67f265c761b76dcd5a077a23"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Mar 29 14:53:25 2012 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Mar 29 14:53:25 2012 -0700"
      },
      "message": "Merge branch \u0027for-3.4\u0027 of git://linux-nfs.org/~bfields/linux\n\nPull nfsd changes from Bruce Fields:\n\nHighlights:\n - Benny Halevy and Tigran Mkrtchyan implemented some more 4.1 features,\n   moving us closer to a complete 4.1 implementation.\n - Bernd Schubert fixed a long-standing problem with readdir cookies on\n   ext2/3/4.\n - Jeff Layton performed a long-overdue overhaul of the server reboot\n   recovery code which will allow us to deprecate the current code (a\n   rather unusual user of the vfs), and give us some needed flexibility\n   for further improvements.\n - Like the client, we now support numeric uid\u0027s and gid\u0027s in the\n   auth_sys case, allowing easier upgrades from NFSv2/v3 to v4.x.\n\nPlus miscellaneous bugfixes and cleanup.\n\nThanks to everyone!\n\nThere are also some delegation fixes waiting on vfs review that I\nsuppose will have to wait for 3.5.  With that done I think we\u0027ll finally\nturn off the \"EXPERIMENTAL\" dependency for v4 (though that\u0027s mostly\nsymbolic as it\u0027s been on by default in distro\u0027s for a while).\n\nAnd the list of 4.1 todo\u0027s should be achievable for 3.5 as well:\n\n   http://wiki.linux-nfs.org/wiki/index.php/Server_4.0_and_4.1_issues\n\nthough we may still want a bit more experience with it before turning it\non by default.\n\n* \u0027for-3.4\u0027 of git://linux-nfs.org/~bfields/linux: (55 commits)\n  nfsd: only register cld pipe notifier when CONFIG_NFSD_V4 is enabled\n  nfsd4: use auth_unix unconditionally on backchannel\n  nfsd: fix NULL pointer dereference in cld_pipe_downcall\n  nfsd4: memory corruption in numeric_name_to_id()\n  sunrpc: skip portmap calls on sessions backchannel\n  nfsd4: allow numeric idmapping\n  nfsd: don\u0027t allow legacy client tracker init for anything but init_net\n  nfsd: add notifier to handle mount/unmount of rpc_pipefs sb\n  nfsd: add the infrastructure to handle the cld upcall\n  nfsd: add a header describing upcall to nfsdcld\n  nfsd: add a per-net-namespace struct for nfsd\n  sunrpc: create nfsd dir in rpc_pipefs\n  nfsd: add nfsd4_client_tracking_ops struct and a way to set it\n  nfsd: convert nfs4_client-\u003ecl_cb_flags to a generic flags field\n  NFSD: Fix nfs4_verifier memory alignment\n  NFSD: Fix warnings when NFSD_DEBUG is not defined\n  nfsd: vfs_llseek() with 32 or 64 bit offsets (hashes)\n  nfsd: rename \u0027int access\u0027 to \u0027int may_flags\u0027 in nfsd_open()\n  ext4: return 32/64-bit dir name hash according to usage type\n  fs: add new FMODE flags: FMODE_32bithash and FMODE_64bithash\n  ...\n"
    },
    {
      "commit": "69e1aaddd63104f37021d0b0f6abfd9623c9134c",
      "tree": "14ad49741b428d270b681694bb2df349465455b9",
      "parents": [
        "56b59b429b4c26e5e730bc8c3d837de9f7d0a966",
        "9d547c35799a4ddd235f1565cec2fff6c9263504"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Mar 28 10:02:55 2012 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Mar 28 10:02:55 2012 -0700"
      },
      "message": "Merge tag \u0027ext4_for_linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4\n\nPull ext4 updates for 3.4 from Ted Ts\u0027o:\n \"Ext4 commits for 3.3 merge window; mostly cleanups and bug fixes\n\n  The changes to export dirty_writeback_interval are from Artem\u0027s s_dirt\n  cleanup patch series.  The same is true of the change to remove the\n  s_dirt helper functions which never got used by anyone in-tree.  I\u0027ve\n  run these changes by Al Viro, and am carrying them so that Artem can\n  more easily fix up the rest of the file systems during the next merge\n  window.  (Originally we had hopped to remove the use of s_dirt from\n  ext4 during this merge window, but his patches had some bugs, so I\n  ultimately ended dropping them from the ext4 tree.)\"\n\n* tag \u0027ext4_for_linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (66 commits)\n  vfs: remove unused superblock helpers\n  mm: export dirty_writeback_interval\n  ext4: remove useless s_dirt assignment\n  ext4: write superblock only once on unmount\n  ext4: do not mark superblock as dirty unnecessarily\n  ext4: correct ext4_punch_hole return codes\n  ext4: remove restrictive checks for EOFBLOCKS_FL\n  ext4: always set then trimmed blocks count into len\n  ext4: fix trimmed block count accunting\n  ext4: fix start and len arguments handling in ext4_trim_fs()\n  ext4: update s_free_{inodes,blocks}_count during online resize\n  ext4: change some printk() calls to use ext4_msg() instead\n  ext4: avoid output message interleaving in ext4_error_\u003cfoo\u003e()\n  ext4: remove trailing newlines from ext4_msg() and ext4_error() messages\n  ext4: add no_printk argument validation, fix fallout\n  ext4: remove redundant \"EXT4-fs: \" from uses of ext4_msg\n  ext4: give more helpful error message in ext4_ext_rm_leaf()\n  ext4: remove unused code from ext4_ext_map_blocks()\n  ext4: rewrite punch hole to use ext4_ext_remove_space()\n  jbd2: cleanup journal tail after transaction commit\n  ...\n"
    },
    {
      "commit": "ed2d265d1266736bd294332d7f649003943ae36e",
      "tree": "860e5b7bb72933e4a9abacdc2f2d75a0e6254e32",
      "parents": [
        "f1d38e423a697b7aa06e12d3ca4753bcc1aa3531",
        "6c03438edeb5c359af35f060ea016ca65671c269"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Mar 24 10:08:39 2012 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Mar 24 10:08:39 2012 -0700"
      },
      "message": "Merge tag \u0027bug-for-3.4\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux\n\nPull \u003clinux/bug.h\u003e cleanup from Paul Gortmaker:\n \"The changes shown here are to unify linux\u0027s BUG support under the one\n  \u003clinux/bug.h\u003e file.  Due to historical reasons, we have some BUG code\n  in bug.h and some in kernel.h -- i.e.  the support for BUILD_BUG in\n  linux/kernel.h predates the addition of linux/bug.h, but old code in\n  kernel.h wasn\u0027t moved to bug.h at that time.  As a band-aid, kernel.h\n  was including \u003casm/bug.h\u003e to pseudo link them.\n\n  This has caused confusion[1] and general yuck/WTF[2] reactions.  Here\n  is an example that violates the principle of least surprise:\n\n      CC      lib/string.o\n      lib/string.c: In function \u0027strlcat\u0027:\n      lib/string.c:225:2: error: implicit declaration of function \u0027BUILD_BUG_ON\u0027\n      make[2]: *** [lib/string.o] Error 1\n      $\n      $ grep linux/bug.h lib/string.c\n      #include \u003clinux/bug.h\u003e\n      $\n\n  We\u0027ve included \u003clinux/bug.h\u003e for the BUG infrastructure and yet we\n  still get a compile fail! [We\u0027ve not kernel.h for BUILD_BUG_ON.] Ugh -\n  very confusing for someone who is new to kernel development.\n\n  With the above in mind, the goals of this changeset are:\n\n  1) find and fix any include/*.h files that were relying on the\n     implicit presence of BUG code.\n  2) find and fix any C files that were consuming kernel.h and hence\n     relying on implicitly getting some/all BUG code.\n  3) Move the BUG related code living in kernel.h to \u003clinux/bug.h\u003e\n  4) remove the asm/bug.h from kernel.h to finally break the chain.\n\n  During development, the order was more like 3-4, build-test, 1-2.  But\n  to ensure that git history for bisect doesn\u0027t get needless build\n  failures introduced, the commits have been reorderd to fix the problem\n  areas in advance.\n\n\t[1]  https://lkml.org/lkml/2012/1/3/90\n\t[2]  https://lkml.org/lkml/2012/1/17/414\"\n\nFix up conflicts (new radeon file, reiserfs header cleanups) as per Paul\nand linux-next.\n\n* tag \u0027bug-for-3.4\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux:\n  kernel.h: doesn\u0027t explicitly use bug.h, so don\u0027t include it.\n  bug: consolidate BUILD_BUG_ON with other bug code\n  BUG: headers with BUG/BUG_ON etc. need linux/bug.h\n  bug.h: add include of it to various implicit C users\n  lib: fix implicit users of kernel.h for TAINT_WARN\n  spinlock: macroize assert_spin_locked to avoid bug.h dependency\n  x86: relocate get/set debugreg fcns to include/asm/debugreg.\n"
    },
    {
      "commit": "9d547c35799a4ddd235f1565cec2fff6c9263504",
      "tree": "c210684cc48a701943a73a415a42797cef5a13fc",
      "parents": [
        "91913a2942d2b582c40673956dec1a9c71d32fe4"
      ],
      "author": {
        "name": "Artem Bityutskiy",
        "email": "artem.bityutskiy@linux.intel.com",
        "time": "Wed Mar 21 22:34:55 2012 -0400"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Wed Mar 21 22:34:55 2012 -0400"
      },
      "message": "vfs: remove unused superblock helpers\n\nRemove the \u0027sb_mark_dirty()\u0027, \u0027sb_mark_clean()\u0027 and \u0027sb_is_dirty()\u0027\nhelpers which are not used. I introduced them 2 years and the\nintention was to make all file-systems use them in order to be able to\noptimize \u0027sync_supers()\u0027.  However, Al Viro vetoed my patches at the\nend and asked me to push superblock management down to file-systems\nand get rid of the \u0027s_dirt\u0027 flag completely, as well as kill\n\u0027sync_supers()\u0027 altogether. Thus, remove the helpers.\n\nSigned-off-by: Artem Bityutskiy \u003cartem.bityutskiy@linux.intel.com\u003e\nCc: Al Viro \u003cviro@ZenIV.linux.org.uk\u003e\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "68ac1234fb949b66941d94dce4157742799fc581",
      "tree": "04059b7dbaed92d672b8ceef1fcf25c6185e06f8",
      "parents": [
        "40ffe67d2e89c7a475421d007becc11a2f88ea3d"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Thu Mar 15 08:21:57 2012 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Mar 20 21:29:41 2012 -0400"
      },
      "message": "switch touch_atime to struct path\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "9bcb4b733c22b7dbc4cf847e707ac98f751e9180",
      "tree": "f99c68d0b7d049d7a25706d23f224c734d0e1da1",
      "parents": [
        "e28e832c3e1e1197873cfd0b6ce86868cf5c391d"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Sun Feb 12 19:43:17 2012 -0500"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Mar 20 21:29:33 2012 -0400"
      },
      "message": "vfs: turn generic_drop_inode() into static inline\n\nOnce upon a time it used to be much bigger, but these days there\u0027s\nno point whatsoever keeping it in fs/inode.c, especially since\nit\u0027s not even needed as initializer for -\u003edrop_inode() - it\u0027s the\ndefault and leaving -\u003edrop_inode NULL will do just as well.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "8de52778798fe39660a8d6b26f290e0c93202761",
      "tree": "56384beb7863c1f338f2b66b509bf58eea5a99c2",
      "parents": [
        "c16fa4f2ad19908a47c63d8fa436a1178438c7e7"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Feb 06 12:45:27 2012 -0500"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Mar 20 21:29:32 2012 -0400"
      },
      "message": "vfs: check i_nlink limits in vfs_{mkdir,rename_dir,link}\n\nNew field of struct super_block - -\u003es_max_links.  Maximal allowed\nvalue of -\u003ei_nlink or 0; in the latter case all checks still need\nto be done in -\u003elink/-\u003emkdir/-\u003erename instances.  Note that this\nlimit applies both to directoris and to non-directories.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "6a8a13e03861c0ab83ab07d573ca793cff0e5d00",
      "tree": "8a3587144828b60cb7472cdf0fa1398734303990",
      "parents": [
        "62aa2b537c6f5957afd98e29f96897419ed5ebab"
      ],
      "author": {
        "name": "Bernd Schubert",
        "email": "bernd.schubert@itwm.fraunhofer.de",
        "time": "Tue Mar 13 22:51:38 2012 -0400"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Tue Mar 13 22:51:38 2012 -0400"
      },
      "message": "fs: add new FMODE flags: FMODE_32bithash and FMODE_64bithash\n\nThose flags are supposed to be set by NFS readdir() to tell ext3/ext4\nto 32bit (NFSv2) or 64bit hash values (offsets) in seekdir().\n\nSigned-off-by: Bernd Schubert \u003cbernd.schubert@itwm.fraunhofer.de\u003e\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "187f1882b5b0748b3c4c22274663fdb372ac0452",
      "tree": "36283f258cf65f03599a045d48bb05d0ec27f3f9",
      "parents": [
        "50af5ead3b44ccf8bd2b4d2a50c1b610f557c480"
      ],
      "author": {
        "name": "Paul Gortmaker",
        "email": "paul.gortmaker@windriver.com",
        "time": "Wed Nov 23 20:12:59 2011 -0500"
      },
      "committer": {
        "name": "Paul Gortmaker",
        "email": "paul.gortmaker@windriver.com",
        "time": "Sun Mar 04 17:54:34 2012 -0500"
      },
      "message": "BUG: headers with BUG/BUG_ON etc. need linux/bug.h\n\nIf a header file is making use of BUG, BUG_ON, BUILD_BUG_ON, or any\nother BUG variant in a static inline (i.e. not in a #define) then\nthat header really should be including \u003clinux/bug.h\u003e and not just\nexpecting it to be implicitly present.\n\nWe can make this change risk-free, since if the files using these\nheaders didn\u0027t have exposure to linux/bug.h already, they would have\nbeen causing compile failures/warnings.\n\nSigned-off-by: Paul Gortmaker \u003cpaul.gortmaker@windriver.com\u003e\n"
    },
    {
      "commit": "6b6dc836a195e077e76977b6c020a73de411b46d",
      "tree": "59920a3aab6db4997f6b7a95c753219bdc12bd64",
      "parents": [
        "074b85175a43a23fdbde60f55feea636e0bf0f85"
      ],
      "author": {
        "name": "Jan Kara",
        "email": "jack@suse.cz",
        "time": "Fri Feb 10 11:03:00 2012 +0100"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Feb 13 20:45:38 2012 -0500"
      },
      "message": "vfs: Provide function to get superblock and wait for it to thaw\n\nIn quota code we need to find a superblock corresponding to a device and wait\nfor superblock to be unfrozen. However this waiting has to happen without\ns_umount semaphore because that is required for superblock to thaw. So provide\na function in VFS for this to keep dances with s_umount where they belong.\n\n[AV: implementation switched to saner variant]\n\nSigned-off-by: Jan Kara \u003cjack@suse.cz\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "c1aab02dac690af7ff634d8e1cb3be6a04387eef",
      "tree": "9018361108b2c370d247452e4517937057bf9895",
      "parents": [
        "ac1e3d4f5c1097422c6e72aeae322033e9a8c803"
      ],
      "author": {
        "name": "Stephen Rothwell",
        "email": "sfr@canb.auug.org.au",
        "time": "Tue Jan 24 11:41:32 2012 +1100"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jan 23 17:17:45 2012 -0800"
      },
      "message": "migrate_mode.h is not exported to user mode\n\nso move its include into fs.h inside the __KERNEL__ protection.\n\nSigned-off-by: Stephen Rothwell \u003csfr@canb.auug.org.au\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "6536e3123e5d3371a6f52e32a3d0694bcc987702",
      "tree": "45212bcb96a33d3a40cd1c631d9670a1bae52c2b",
      "parents": [
        "dcd6c92267155e70a94b3927bce681ce74b80d1f"
      ],
      "author": {
        "name": "Andrew Morton",
        "email": "akpm@linux-foundation.org",
        "time": "Fri Jan 20 14:33:53 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jan 23 08:38:47 2012 -0800"
      },
      "message": "mm: fix warnings regarding enum migrate_mode\n\nsparc64 allmodconfig:\n\nIn file included from include/linux/compat.h:15,\n                 from /usr/src/25/arch/sparc/include/asm/siginfo.h:19,\n                 from include/linux/signal.h:5,\n                 from include/linux/sched.h:73,\n                 from arch/sparc/kernel/asm-offsets.c:13:\ninclude/linux/fs.h:618: warning: parameter has incomplete type\n\nIt seems that my sparc64 compiler (gcc-3.4.5) doesn\u0027t like the forward\ndeclaration of enums.\n\nFix this by moving the \"enum migrate_mode\" definition into its own header\nfile.\n\nAcked-by: Mel Gorman \u003cmgorman@suse.de\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: Dave Jones \u003cdavej@redhat.com\u003e\nCc: Jan Kara \u003cjack@suse.cz\u003e\nCc: Andy Isaacson \u003cadi@hexapodia.org\u003e\nCc: Nai Xia \u003cnai.xia@gmail.com\u003e\nCc: Johannes Weiner \u003cjweiner@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": "b3c9dd182ed3bdcdaf0e42625a35924b0497afdc",
      "tree": "ad48ad4d923fee147c736318d0fad35b3755f4f5",
      "parents": [
        "83c2f912b43c3a7babbb6cb7ae2a5276c1ed2a3e",
        "5d381efb3d1f1ef10535a31ca0dd9b22fe1e1922"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun Jan 15 12:24:45 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sun Jan 15 12:24:45 2012 -0800"
      },
      "message": "Merge branch \u0027for-3.3/core\u0027 of git://git.kernel.dk/linux-block\n\n* \u0027for-3.3/core\u0027 of git://git.kernel.dk/linux-block: (37 commits)\n  Revert \"block: recursive merge requests\"\n  block: Stop using macro stubs for the bio data integrity calls\n  blockdev: convert some macros to static inlines\n  fs: remove unneeded plug in mpage_readpages()\n  block: Add BLKROTATIONAL ioctl\n  block: Introduce blk_set_stacking_limits function\n  block: remove WARN_ON_ONCE() in exit_io_context()\n  block: an exiting task should be allowed to create io_context\n  block: ioc_cgroup_changed() needs to be exported\n  block: recursive merge requests\n  block, cfq: fix empty queue crash caused by request merge\n  block, cfq: move icq creation and rq-\u003eelv.icq association to block core\n  block, cfq: restructure io_cq creation path for io_context interface cleanup\n  block, cfq: move io_cq exit/release to blk-ioc.c\n  block, cfq: move icq cache management to block core\n  block, cfq: move io_cq lookup to blk-ioc.c\n  block, cfq: move cfqd-\u003eicq_list to request_queue and add request-\u003eelv.icq\n  block, cfq: reorganize cfq_io_context into generic and cfq specific parts\n  block: remove elevator_queue-\u003eops\n  block: reorder elevator switch sequence\n  ...\n\nFix up conflicts in:\n - block/blk-cgroup.c\n\tSwitch from can_attach_task to can_attach\n - block/cfq-iosched.c\n\tconflict with now removed cic index changes (we now use q-\u003eid instead)\n"
    },
    {
      "commit": "87192a2a49c475cf322cb143e0fa63b0102d8567",
      "tree": "70acf2fb1e4a9a3a62559ad9218278d2fb114599",
      "parents": [
        "ae55e1aaa7e2e57e538cb98cf617f511c5dc4f73"
      ],
      "author": {
        "name": "Andi Kleen",
        "email": "ak@linux.intel.com",
        "time": "Thu Jan 12 17:20:34 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Jan 12 20:13:12 2012 -0800"
      },
      "message": "vfs: cache request_queue in struct block_device\n\nThis makes it possible to get from the inode to the request_queue with one\nless cache miss.  Used in followon optimization.\n\nThe livetime of the pointer is the same as the gendisk.\n\nThis assumes that the queue will always stay the same in the gendisk while\nit\u0027s visible to block_devices.  I think that\u0027s safe correct?\n\nSigned-off-by: Andi Kleen \u003cak@linux.intel.com\u003e\nAcked-by: Jeff Moyer \u003cjmoyer@redhat.com\u003e\nCc: Jens Axboe \u003caxboe@kernel.dk\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "a6bc32b899223a877f595ef9ddc1e89ead5072b8",
      "tree": "a9529f7af2cf8e77bb6670acea32169c891a2b76",
      "parents": [
        "66199712e9eef5aede09dbcd9dfff87798a66917"
      ],
      "author": {
        "name": "Mel Gorman",
        "email": "mgorman@suse.de",
        "time": "Thu Jan 12 17:19:43 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Jan 12 20:13:09 2012 -0800"
      },
      "message": "mm: compaction: introduce sync-light migration for use by compaction\n\nThis patch adds a lightweight sync migrate operation MIGRATE_SYNC_LIGHT\nmode that avoids writing back pages to backing storage.  Async compaction\nmaps to MIGRATE_ASYNC while sync compaction maps to MIGRATE_SYNC_LIGHT.\nFor other migrate_pages users such as memory hotplug, MIGRATE_SYNC is\nused.\n\nThis avoids sync compaction stalling for an excessive length of time,\nparticularly when copying files to a USB stick where there might be a\nlarge number of dirty pages backed by a filesystem that does not support\n-\u003ewritepages.\n\n[aarcange@redhat.com: This patch is heavily based on Andrea\u0027s work]\n[akpm@linux-foundation.org: fix fs/nfs/write.c build]\n[akpm@linux-foundation.org: fix fs/btrfs/disk-io.c build]\nSigned-off-by: Mel Gorman \u003cmgorman@suse.de\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: Dave Jones \u003cdavej@redhat.com\u003e\nCc: Jan Kara \u003cjack@suse.cz\u003e\nCc: Andy Isaacson \u003cadi@hexapodia.org\u003e\nCc: Nai Xia \u003cnai.xia@gmail.com\u003e\nCc: Johannes Weiner \u003cjweiner@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": "b969c4ab9f182a6e1b2a0848be349f99714947b0",
      "tree": "dc1c6e4375cfec7b15f13a37307eba8a9e07f40f",
      "parents": [
        "7335084d446b83cbcb15da80497d03f0c1dc9e21"
      ],
      "author": {
        "name": "Mel Gorman",
        "email": "mgorman@suse.de",
        "time": "Thu Jan 12 17:19:34 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Jan 12 20:13:09 2012 -0800"
      },
      "message": "mm: compaction: determine if dirty pages can be migrated without blocking within -\u003emigratepage\n\nAsynchronous compaction is used when allocating transparent hugepages to\navoid blocking for long periods of time.  Due to reports of stalling,\nthere was a debate on disabling synchronous compaction but this severely\nimpacted allocation success rates.  Part of the reason was that many dirty\npages are skipped in asynchronous compaction by the following check;\n\n\tif (PageDirty(page) \u0026\u0026 !sync \u0026\u0026\n\t\tmapping-\u003ea_ops-\u003emigratepage !\u003d migrate_page)\n\t\t\trc \u003d -EBUSY;\n\nThis skips over all mapping aops using buffer_migrate_page() even though\nit is possible to migrate some of these pages without blocking.  This\npatch updates the -\u003emigratepage callback with a \"sync\" parameter.  It is\nthe responsibility of the callback to fail gracefully if migration would\nblock.\n\nSigned-off-by: Mel Gorman \u003cmgorman@suse.de\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: Dave Jones \u003cdavej@redhat.com\u003e\nCc: Jan Kara \u003cjack@suse.cz\u003e\nCc: Andy Isaacson \u003cadi@hexapodia.org\u003e\nCc: Nai Xia \u003cnai.xia@gmail.com\u003e\nCc: Johannes Weiner \u003cjweiner@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": "28d82dc1c4edbc352129f97f4ca22624d1fe61de",
      "tree": "a6fbd269d17134ff42597b4e02eba4345bf6d901",
      "parents": [
        "2ccd4f4d4737b37e21dd92c8c584c23cd87740a2"
      ],
      "author": {
        "name": "Jason Baron",
        "email": "jbaron@redhat.com",
        "time": "Thu Jan 12 17:17:43 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Jan 12 20:13:04 2012 -0800"
      },
      "message": "epoll: limit paths\n\nThe current epoll code can be tickled to run basically indefinitely in\nboth loop detection path check (on ep_insert()), and in the wakeup paths.\nThe programs that tickle this behavior set up deeply linked networks of\nepoll file descriptors that cause the epoll algorithms to traverse them\nindefinitely.  A couple of these sample programs have been previously\nposted in this thread: https://lkml.org/lkml/2011/2/25/297.\n\nTo fix the loop detection path check algorithms, I simply keep track of\nthe epoll nodes that have been already visited.  Thus, the loop detection\nbecomes proportional to the number of epoll file descriptor and links.\nThis dramatically decreases the run-time of the loop check algorithm.  In\none diabolical case I tried it reduced the run-time from 15 mintues (all\nin kernel time) to .3 seconds.\n\nFixing the wakeup paths could be done at wakeup time in a similar manner\nby keeping track of nodes that have already been visited, but the\ncomplexity is harder, since there can be multiple wakeups on different\ncpus...Thus, I\u0027ve opted to limit the number of possible wakeup paths when\nthe paths are created.\n\nThis is accomplished, by noting that the end file descriptor points that\nare found during the loop detection pass (from the newly added link), are\nactually the sources for wakeup events.  I keep a list of these file\ndescriptors and limit the number and length of these paths that emanate\nfrom these \u0027source file descriptors\u0027.  In the current implemetation I\nallow 1000 paths of length 1, 500 of length 2, 100 of length 3, 50 of\nlength 4 and 10 of length 5.  Note that it is sufficient to check the\n\u0027source file descriptors\u0027 reachable from the newly added link, since no\nother \u0027source file descriptors\u0027 will have newly added links.  This allows\nus to check only the wakeup paths that may have gotten too long, and not\nre-check all possible wakeup paths on the system.\n\nIn terms of the path limit selection, I think its first worth noting that\nthe most common case for epoll, is probably the model where you have 1\nepoll file descriptor that is monitoring n number of \u0027source file\ndescriptors\u0027.  In this case, each \u0027source file descriptor\u0027 has a 1 path of\nlength 1.  Thus, I believe that the limits I\u0027m proposing are quite\nreasonable and in fact may be too generous.  Thus, I\u0027m hoping that the\nproposed limits will not prevent any workloads that currently work to\nfail.\n\nIn terms of locking, I have extended the use of the \u0027epmutex\u0027 to all\nepoll_ctl add and remove operations.  Currently its only used in a subset\nof the add paths.  I need to hold the epmutex, so that we can correctly\ntraverse a coherent graph, to check the number of paths.  I believe that\nthis additional locking is probably ok, since its in the setup/teardown\npaths, and doesn\u0027t affect the running paths, but it certainly is going to\nadd some extra overhead.  Also, worth noting is that the epmuex was\nrecently added to the ep_ctl add operations in the initial path loop\ndetection code using the argument that it was not on a critical path.\n\nAnother thing to note here, is the length of epoll chains that is allowed.\nCurrently, eventpoll.c defines:\n\n/* Maximum number of nesting allowed inside epoll sets */\n#define EP_MAX_NESTS 4\n\nThis basically means that I am limited to a graph depth of 5 (EP_MAX_NESTS\n+ 1).  However, this limit is currently only enforced during the loop\ncheck detection code, and only when the epoll file descriptors are added\nin a certain order.  Thus, this limit is currently easily bypassed.  The\nnewly added check for wakeup paths, stricly limits the wakeup paths to a\nlength of 5, regardless of the order in which ep\u0027s are linked together.\nThus, a side-effect of the new code is a more consistent enforcement of\nthe graph depth.\n\nThus far, I\u0027ve tested this, using the sample programs previously\nmentioned, which now either return quickly or return -EINVAL.  I\u0027ve also\ntesting using the piptest.c epoll tester, which showed no difference in\nperformance.  I\u0027ve also created a number of different epoll networks and\ntested that they behave as expectded.\n\nI believe this solves the original diabolical test cases, while still\npreserving the sane epoll nesting.\n\nSigned-off-by: Jason Baron \u003cjbaron@redhat.com\u003e\nCc: Nelson Elhage \u003cnelhage@ksplice.com\u003e\nCc: Davide Libenzi \u003cdavidel@xmailserver.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "ef00f59c95fe6e002e7c6e3663cdea65e253f4cc",
      "tree": "8e84273162b7a743767098cc08b6c6eb2b041281",
      "parents": [
        "b1bd055d397e09f99dcef9b138ed104ff1812fcb"
      ],
      "author": {
        "name": "Martin K. Petersen",
        "email": "martin.petersen@oracle.com",
        "time": "Wed Jan 11 16:29:31 2012 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "axboe@kernel.dk",
        "time": "Wed Jan 11 16:29:31 2012 +0100"
      },
      "message": "block: Add BLKROTATIONAL ioctl\n\nIntroduce an ioctl which permits applications to query whether a block\ndevice is rotational.\n\nSigned-off-by: Martin K. Petersen \u003cmartin.petersen@oracle.com\u003e\nSigned-off-by: Jens Axboe \u003caxboe@kernel.dk\u003e\n"
    },
    {
      "commit": "8e8b87964bc8dc5c14b6543fc933b7725f07d3ac",
      "tree": "9a14c135741f3a8ba960ff97f060a58597604a6d",
      "parents": [
        "7ada4db88634429f4da690ad1c4eb73c93085f0c"
      ],
      "author": {
        "name": "Miklos Szeredi",
        "email": "mszeredi@suse.cz",
        "time": "Mon Nov 21 12:11:33 2011 +0100"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Fri Jan 06 23:20:13 2012 -0500"
      },
      "message": "vfs: prevent remount read-only if pending removes\n\nIf there are any inodes on the super block that have been unlinked\n(i_nlink \u003d\u003d 0) but have not yet been deleted then prevent the\nremounting the super block read-only.\n\nReported-by: Toshiyuki Okajima \u003ctoshi.okajima@jp.fujitsu.com\u003e\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nTested-by: Toshiyuki Okajima \u003ctoshi.okajima@jp.fujitsu.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "7ada4db88634429f4da690ad1c4eb73c93085f0c",
      "tree": "ed1228f0bfa9d0050d746933595004d7c6e940f9",
      "parents": [
        "4ed5e82fe77f4147cf386327c9a63a2dd7eff518"
      ],
      "author": {
        "name": "Miklos Szeredi",
        "email": "mszeredi@suse.cz",
        "time": "Mon Nov 21 12:11:32 2011 +0100"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Fri Jan 06 23:20:12 2012 -0500"
      },
      "message": "vfs: count unlinked inodes\n\nAdd a new counter to the superblock that keeps track of unlinked but\nnot yet deleted inodes.\n\nDo not WARN_ON if set_nlink is called with zero count, just do a\nratelimited printk.  This happens on xfs and probably other\nfilesystems after an unclean shutdown when the filesystem reads inodes\nwhich already have zero i_nlink.  Reported by Christoph Hellwig.\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nTested-by: Toshiyuki Okajima \u003ctoshi.okajima@jp.fujitsu.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "4ed5e82fe77f4147cf386327c9a63a2dd7eff518",
      "tree": "f4eaeefaf5d293014457892ac31f878eece07331",
      "parents": [
        "39f7c4db1d2d9e2e2a90abdf34811783089d217d"
      ],
      "author": {
        "name": "Miklos Szeredi",
        "email": "mszeredi@suse.cz",
        "time": "Mon Nov 21 12:11:31 2011 +0100"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Fri Jan 06 23:20:12 2012 -0500"
      },
      "message": "vfs: protect remounting superblock read-only\n\nCurrently remouting superblock read-only is racy in a major way.\n\nWith the per mount read-only infrastructure it is now possible to\nprevent most races, which this patch attempts.\n\nBefore starting the remount read-only, iterate through all mounts\nbelonging to the superblock and if none of them have any pending\nwrites, set sb-\u003es_readonly_remount.  This indicates that remount is in\nprogress and no further write requests are allowed.  If the remount\nsucceeds set MS_RDONLY and reset s_readonly_remount.\n\nIf the remounting is unsuccessful just reset s_readonly_remount.\nThis can result in transient EROFS errors, despite the fact the\nremount failed.  Unfortunately hodling off writes is difficult as\nremount itself may touch the filesystem (e.g. through load_nls())\nwhich would deadlock.\n\nA later patch deals with delayed writes due to nlink going to zero.\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nTested-by: Toshiyuki Okajima \u003ctoshi.okajima@jp.fujitsu.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "39f7c4db1d2d9e2e2a90abdf34811783089d217d",
      "tree": "cbc3496ce21e26b5891bb4c4d4155853317ddfb3",
      "parents": [
        "34c80b1d93e6e20ca9dea0baf583a5b5510d92d4"
      ],
      "author": {
        "name": "Miklos Szeredi",
        "email": "mszeredi@suse.cz",
        "time": "Mon Nov 21 12:11:30 2011 +0100"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Fri Jan 06 23:20:12 2012 -0500"
      },
      "message": "vfs: keep list of mounts for each superblock\n\nKeep track of vfsmounts belonging to a superblock.  List is protected\nby vfsmount_lock.\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nTested-by: Toshiyuki Okajima \u003ctoshi.okajima@jp.fujitsu.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "34c80b1d93e6e20ca9dea0baf583a5b5510d92d4",
      "tree": "7dcbf0a4e09464247e6992c8f44fcc872867bd3a",
      "parents": [
        "a6322de67b58a00e3a783ad9c87c2a11b2d67b47"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Thu Dec 08 21:32:45 2011 -0500"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Fri Jan 06 23:19:54 2012 -0500"
      },
      "message": "vfs: switch -\u003eshow_options() to struct dentry *\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "a6322de67b58a00e3a783ad9c87c2a11b2d67b47",
      "tree": "526d8cb03b5f357bab06907eecad4c1d444a4934",
      "parents": [
        "d861c630e99febe5ce6055290085556c5b714b06"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Thu Dec 08 21:37:57 2011 -0500"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Fri Jan 06 23:16:55 2012 -0500"
      },
      "message": "vfs: switch -\u003eshow_path() to struct dentry *\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "d861c630e99febe5ce6055290085556c5b714b06",
      "tree": "972fb0e89694197dbdbeca13920de08394abfe39",
      "parents": [
        "64132379d509184425672e0dce1ac0a031e3f2a5"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Thu Dec 08 21:32:45 2011 -0500"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Fri Jan 06 23:16:54 2012 -0500"
      },
      "message": "vfs: switch -\u003eshow_devname() to struct dentry *\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "64132379d509184425672e0dce1ac0a031e3f2a5",
      "tree": "2b7191e0e37bf061b2000935c7cf78e6fb1f3c95",
      "parents": [
        "cdcf116d44e78c7216ba9f8be9af1cdfca7af728"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Thu Dec 08 20:51:13 2011 -0500"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Fri Jan 06 23:16:54 2012 -0500"
      },
      "message": "vfs: switch -\u003eshow_stats to struct dentry *\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "ece2ccb668046610189d88d6aaf05aeb09c988a1",
      "tree": "a0349945f7537de2aca420b47ced23b6294f8b65",
      "parents": [
        "d10577a8d86a0c735488d66d32289a6d66bcfa20",
        "a218d0fdc5f9004164ff151d274487f6799907d0",
        "ff01bb4832651c6d25ac509a06a10fcbd75c461c"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Fri Jan 06 23:15:54 2012 -0500"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Fri Jan 06 23:15:54 2012 -0500"
      },
      "message": "Merge branches \u0027vfsmount-guts\u0027, \u0027umode_t\u0027 and \u0027partitions\u0027 into Z\n"
    },
    {
      "commit": "a218d0fdc5f9004164ff151d274487f6799907d0",
      "tree": "24ea22ffb4aadb1fedff50c4a7fcb17af1981459",
      "parents": [
        "04fc66e789a896e684bfdca30208e57eb832dd96"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Nov 21 14:59:34 2011 -0500"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jan 03 22:55:19 2012 -0500"
      },
      "message": "switch open and mkdir syscalls to umode_t\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "8d334acdd2c1f57c7a574c6f24d08e4c95582ff0",
      "tree": "195e9c55d2310fa81e7bd325a95481b33b9a2d4a",
      "parents": [
        "62bb109170375f82eb3c51c8080b72954f02dca7"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Sun Jul 24 23:21:59 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jan 03 22:55:11 2012 -0500"
      },
      "message": "switch is_sxid() to umode_t\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "62bb109170375f82eb3c51c8080b72954f02dca7",
      "tree": "47d0a7b84c195b2267ed6803e4492eec6ec8478c",
      "parents": [
        "175a4eb7ea531cdbf6d574f5d5ba9aa0f5e8ed13"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Sun Jul 24 23:20:18 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jan 03 22:55:11 2012 -0500"
      },
      "message": "switch inode_init_owner() to umode_t\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "1a67aafb5f72a436ca044293309fa7e6351d6a35",
      "tree": "d9e58600148de9d41b478cf815773b746647d15b",
      "parents": [
        "4acdaf27ebe2034c342f3be57ef49aed1ad885ef"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jul 26 01:52:52 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jan 03 22:54:54 2012 -0500"
      },
      "message": "switch -\u003emknod() to umode_t\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "4acdaf27ebe2034c342f3be57ef49aed1ad885ef",
      "tree": "d89a876ee19cd88609a587f8aa6c464a52ee6d98",
      "parents": [
        "18bb1db3e7607e4a997d50991a6f9fa5b0f8722c"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jul 26 01:42:34 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jan 03 22:54:53 2012 -0500"
      },
      "message": "switch -\u003ecreate() to umode_t\n\nvfs_create() ignores everything outside of 16bit subset of its\nmode argument; switching it to umode_t is obviously equivalent\nand it\u0027s the only caller of the method\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "18bb1db3e7607e4a997d50991a6f9fa5b0f8722c",
      "tree": "4ee4e584bc9a67f3ec14ce159d2d7d4a27e68d4a",
      "parents": [
        "8208a22bb8bd3c52ef634b4ff194f14892ab1713"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jul 26 01:41:39 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jan 03 22:54:53 2012 -0500"
      },
      "message": "switch vfs_mkdir() and -\u003emkdir() to umode_t\n\nvfs_mkdir() gets int, but immediately drops everything that might not\nfit into umode_t and that\u0027s the only caller of -\u003emkdir()...\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "ff01bb4832651c6d25ac509a06a10fcbd75c461c",
      "tree": "bbfdebd317db97d346df78293566f36e883b1be9",
      "parents": [
        "94ea4158f1733e3b10cef067d535f504866e0c41"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Fri Sep 16 02:31:11 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jan 03 22:54:07 2012 -0500"
      },
      "message": "fs: move code out of buffer.c\n\nMove invalidate_bdev, block_sync_page into fs/block_dev.c.  Export\nkill_bdev as well, so brd doesn\u0027t have to open code it.  Reduce\nbuffer_head.h requirement accordingly.\n\nRemoved a rather large comment from invalidate_bdev, as it looked a bit\nobsolete to bother moving.  The small comment replacing it says enough.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Al Viro \u003cviro@ZenIV.linux.org.uk\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "cf31e70d6cf93f19fe9bf1144966ef40991ac723",
      "tree": "39cdc07b9d46b17ef882ddeb5041f4faec808662",
      "parents": [
        "c972b4bc8331b432f51a5f1bc3ca7e020172717f"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Jan 02 22:28:36 2012 -0500"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jan 03 22:53:07 2012 -0500"
      },
      "message": "vfs: new helper - vfs_ustat()\n\n... and bury user_get_super()/statfs_by_dentry() - they are\npurely internal now.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "a5166169f9b920cae3c503910cb66a3ac5dd846d",
      "tree": "ba62f9f2227c4eff9ad6d473f674f72443fba0fb",
      "parents": [
        "5352d3b65ae6f38e71e16f704414c1db4b4f7228"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Dec 12 22:53:00 2011 -0500"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jan 03 22:52:39 2012 -0500"
      },
      "message": "vfs: convert fs_supers to hlist\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "58a48c4b50249df1bebcedca479f6faa7091bd0e",
      "tree": "672a16e3580207b7ada626032f218d1ce247cabc",
      "parents": [
        "3a15d7377faf8b10d04febc6c265ecf5f52c2558"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Dec 05 08:43:34 2011 -0500"
      },
      "committer": {
        "name": "Greg Kroah-Hartman",
        "email": "gregkh@suse.de",
        "time": "Wed Dec 21 12:57:36 2011 -0800"
      },
      "message": "fix apparmor dereferencing potentially freed dentry, sanitize __d_path() API\n\ncommit 02125a826459a6ad142f8d91c5b6357562f96615 upstream.\n\n__d_path() API is asking for trouble and in case of apparmor d_namespace_path()\ngetting just that.  The root cause is that when __d_path() misses the root\nit had been told to look for, it stores the location of the most remote ancestor\nin *root.  Without grabbing references.  Sure, at the moment of call it had\nbeen pinned down by what we have in *path.  And if we raced with umount -l, we\ncould have very well stopped at vfsmount/dentry that got freed as soon as\nprepend_path() dropped vfsmount_lock.\n\nIt is safe to compare these pointers with pre-existing (and known to be still\nalive) vfsmount and dentry, as long as all we are asking is \"is it the same\naddress?\".  Dereferencing is not safe and apparmor ended up stepping into\nthat.  d_namespace_path() really wants to examine the place where we stopped,\neven if it\u0027s not connected to our namespace.  As the result, it looked\nat -\u003ed_sb-\u003es_magic of a dentry that might\u0027ve been already freed by that point.\nAll other callers had been careful enough to avoid that, but it\u0027s really\na bad interface - it invites that kind of trouble.\n\nThe fix is fairly straightforward, even though it\u0027s bigger than I\u0027d like:\n\t* prepend_path() root argument becomes const.\n\t* __d_path() is never called with NULL/NULL root.  It was a kludge\nto start with.  Instead, we have an explicit function - d_absolute_root().\nSame as __d_path(), except that it doesn\u0027t get root passed and stops where\nit stops.  apparmor and tomoyo are using it.\n\t* __d_path() returns NULL on path outside of root.  The main\ncaller is show_mountinfo() and that\u0027s precisely what we pass root for - to\nskip those outside chroot jail.  Those who don\u0027t want that can (and do)\nuse d_path().\n\t* __d_path() root argument becomes const.  Everyone agrees, I hope.\n\t* apparmor does *NOT* try to use __d_path() or any of its variants\nwhen it sees that path-\u003emnt is an internal vfsmount.  In that case it\u0027s\ndefinitely not mounted anywhere and dentry_path() is exactly what we want\nthere.  Handling of sysctl()-triggered weirdness is moved to that place.\n\t* if apparmor is asked to do pathname relative to chroot jail\nand __d_path() tells it we it\u0027s not in that jail, the sucker just calls\nd_absolute_path() instead.  That\u0027s the other remaining caller of __d_path(),\nBTW.\n        * seq_path_root() does _NOT_ return -ENAMETOOLONG (it\u0027s stupid anyway -\nthe normal seq_file logics will take care of growing the buffer and redoing\nthe call of -\u003eshow() just fine).  However, if it gets path not reachable\nfrom root, it returns SEQ_SKIP.  The only caller adjusted (i.e. stopped\nignoring the return value as it used to do).\n\nReviewed-by: John Johansen \u003cjohn.johansen@canonical.com\u003e\nACKed-by: John Johansen \u003cjohn.johansen@canonical.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\n\n"
    },
    {
      "commit": "88b3f3dc89834601b75be84bfae4c882afcbe65b",
      "tree": "63463b8d407c0731063671f2fb04ed05d44d7746",
      "parents": [
        "6bc6375e10b58ecc34bfa1fa8fc1112a5750e3be"
      ],
      "author": {
        "name": "Eric Dumazet",
        "email": "eric.dumazet@gmail.com",
        "time": "Tue Jul 26 11:36:34 2011 +0200"
      },
      "committer": {
        "name": "Pankaj Kumar",
        "email": "pakuma@codeaurora.org",
        "time": "Thu Dec 15 15:57:08 2011 +0530"
      },
      "message": "vfs: dont chain pipe/anon/socket on superblock s_inodes list\n\nWorkloads using pipes and sockets hit inode_sb_list_lock contention.\n\nsuperblock s_inodes list is needed for quota, dirty, pagecache and\nfsnotify management. pipe/anon/socket fs are clearly not candidates for\nthese.\n\nChange-Id: I8ed74115fb164a96e5a726d2cb7f476f140c384d\nSigned-off-by: Eric Dumazet \u003ceric.dumazet@gmail.com\u003e\nReviewed-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: Pankaj Kumar \u003cpakuma@codeaurora.org\u003e\n"
    },
    {
      "commit": "6bc6375e10b58ecc34bfa1fa8fc1112a5750e3be",
      "tree": "5bd4718d1b48ef3f3edf168c369dbff4b8d931b4",
      "parents": [
        "a1d36c34cf184779330924c85dec99639733c1eb"
      ],
      "author": {
        "name": "Tim Chen",
        "email": "tim.c.chen@linux.intel.com",
        "time": "Tue Jul 19 09:32:38 2011 -0700"
      },
      "committer": {
        "name": "Pankaj Kumar",
        "email": "pakuma@codeaurora.org",
        "time": "Thu Dec 15 15:53:32 2011 +0530"
      },
      "message": "VFS : mount lock scalability for internal mounts\n\nFor a number of file systems that don\u0027t have a mount point (e.g. sockfs\nand pipefs), they are not marked as long term. Therefore in\nmntput_no_expire, all locks in vfs_mount lock are taken instead of just\nlocal cpu\u0027s lock to aggregate reference counts when we release\nreference to file objects.  In fact, only local lock need to have been\ntaken to update ref counts as these file systems are in no danger of\ngoing away until we are ready to unregister them.\n\nThe attached patch marks file systems using kern_mount without\nmount point as long term.  The contentions of vfs_mount lock\nis now eliminated.  Before un-registering such file system,\nkern_unmount should be called to remove the long term flag and\nmake the mount point ready to be freed.\n\nChange-Id: Ifbb211d08f25e4c2ec3b22126b8e745ee1cee0ea\nSigned-off-by: Tim Chen \u003ctim.c.chen@linux.intel.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: Pankaj Kumar \u003cpakuma@codeaurora.org\u003e\n"
    },
    {
      "commit": "83aeeada7c69f35e5100b27ec354335597a7a488",
      "tree": "44644e68f303368feba7c8ba3e0e0991d6238ada",
      "parents": [
        "635697c663f38106063d5659f0cf2e45afcd4bb5"
      ],
      "author": {
        "name": "Konstantin Khlebnikov",
        "email": "khlebnikov@openvz.org",
        "time": "Thu Dec 08 14:33:54 2011 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Dec 09 07:50:27 2011 -0800"
      },
      "message": "vmscan: use atomic-long for shrinker batching\n\nUse atomic-long operations instead of looping around cmpxchg().\n\n[akpm@linux-foundation.org: massage atomic.h inclusions]\nSigned-off-by: Konstantin Khlebnikov \u003ckhlebnikov@openvz.org\u003e\nCc: Dave Chinner \u003cdavid@fromorbit.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "02125a826459a6ad142f8d91c5b6357562f96615",
      "tree": "8c9d9860aef93917d9b8cc6d471fe68b58ce7a9d",
      "parents": [
        "5611cc4572e889b62a7b4c72a413536bf6a9c416"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Dec 05 08:43:34 2011 -0500"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Dec 06 23:57:18 2011 -0500"
      },
      "message": "fix apparmor dereferencing potentially freed dentry, sanitize __d_path() API\n\n__d_path() API is asking for trouble and in case of apparmor d_namespace_path()\ngetting just that.  The root cause is that when __d_path() misses the root\nit had been told to look for, it stores the location of the most remote ancestor\nin *root.  Without grabbing references.  Sure, at the moment of call it had\nbeen pinned down by what we have in *path.  And if we raced with umount -l, we\ncould have very well stopped at vfsmount/dentry that got freed as soon as\nprepend_path() dropped vfsmount_lock.\n\nIt is safe to compare these pointers with pre-existing (and known to be still\nalive) vfsmount and dentry, as long as all we are asking is \"is it the same\naddress?\".  Dereferencing is not safe and apparmor ended up stepping into\nthat.  d_namespace_path() really wants to examine the place where we stopped,\neven if it\u0027s not connected to our namespace.  As the result, it looked\nat -\u003ed_sb-\u003es_magic of a dentry that might\u0027ve been already freed by that point.\nAll other callers had been careful enough to avoid that, but it\u0027s really\na bad interface - it invites that kind of trouble.\n\nThe fix is fairly straightforward, even though it\u0027s bigger than I\u0027d like:\n\t* prepend_path() root argument becomes const.\n\t* __d_path() is never called with NULL/NULL root.  It was a kludge\nto start with.  Instead, we have an explicit function - d_absolute_root().\nSame as __d_path(), except that it doesn\u0027t get root passed and stops where\nit stops.  apparmor and tomoyo are using it.\n\t* __d_path() returns NULL on path outside of root.  The main\ncaller is show_mountinfo() and that\u0027s precisely what we pass root for - to\nskip those outside chroot jail.  Those who don\u0027t want that can (and do)\nuse d_path().\n\t* __d_path() root argument becomes const.  Everyone agrees, I hope.\n\t* apparmor does *NOT* try to use __d_path() or any of its variants\nwhen it sees that path-\u003emnt is an internal vfsmount.  In that case it\u0027s\ndefinitely not mounted anywhere and dentry_path() is exactly what we want\nthere.  Handling of sysctl()-triggered weirdness is moved to that place.\n\t* if apparmor is asked to do pathname relative to chroot jail\nand __d_path() tells it we it\u0027s not in that jail, the sucker just calls\nd_absolute_path() instead.  That\u0027s the other remaining caller of __d_path(),\nBTW.\n        * seq_path_root() does _NOT_ return -ENAMETOOLONG (it\u0027s stupid anyway -\nthe normal seq_file logics will take care of growing the buffer and redoing\nthe call of -\u003eshow() just fine).  However, if it gets path not reachable\nfrom root, it returns SEQ_SKIP.  The only caller adjusted (i.e. stopped\nignoring the return value as it used to do).\n\nReviewed-by: John Johansen \u003cjohn.johansen@canonical.com\u003e\nACKed-by: John Johansen \u003cjohn.johansen@canonical.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: stable@vger.kernel.org\n"
    },
    {
      "commit": "ea441d1104cf1efb471fa81bc91e9fd1e6ae29fd",
      "tree": "32b7c4f7c78af47936a604e3f4e13e8e61f834a0",
      "parents": [
        "c13344958780b4046305ee6235d686c846535529"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Nov 16 21:43:59 2011 -0500"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Nov 16 22:00:34 2011 -0500"
      },
      "message": "new helper: mount_subtree()\n\ntakes vfsmount and relative path, does lookup within that vfsmount\n(possibly triggering automounts) and returns the result as root\nof subtree suitable for return by -\u003emount() (i.e. a reference to\ndentry and an active reference to its superblock grabbed, superblock\nlocked exclusive).\n\nbtrfs and nfs switched to it instead of open-coding the sucker.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "d211858837ff8d8e31942ca7d27e6e08b3b46f5e",
      "tree": "a8ec83a791066e64ad02052498dbe39ebefacab9",
      "parents": [
        "f1f8935a5c38a2c61e86a42bc971a2539eef2211",
        "f0023bc617ba600956b9226f1806033d7486c8ba"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Nov 02 11:41:01 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Nov 02 11:41:01 2011 -0700"
      },
      "message": "Merge branch \u0027for-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/hch/vfs-queue\n\n* \u0027for-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/hch/vfs-queue:\n  vfs: add d_prune dentry operation\n  vfs: protect i_nlink\n  filesystems: add set_nlink()\n  filesystems: add missing nlink wrappers\n  logfs: remove unnecessary nlink setting\n  ocfs2: remove unnecessary nlink setting\n  jfs: remove unnecessary nlink setting\n  hypfs: remove unnecessary nlink setting\n  vfs: ignore error on forced remount\n  readlinkat: ensure we return ENOENT for the empty pathname for normal lookups\n  vfs: fix dentry leak in simple_fill_super()\n"
    },
    {
      "commit": "f1f8935a5c38a2c61e86a42bc971a2539eef2211",
      "tree": "694950045f2f5d89507d7206cf6595e09cdfbd2c",
      "parents": [
        "34116645d912f65d7eb4508a1db3c9d0e45facb1",
        "f2a44523b20f323e4aef7c16261d34d6f0a4bf06"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Nov 02 10:06:20 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Nov 02 10:06:20 2011 -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: (97 commits)\n  jbd2: Unify log messages in jbd2 code\n  jbd/jbd2: validate sb-\u003es_first in journal_get_superblock()\n  ext4: let ext4_ext_rm_leaf work with EXT_DEBUG defined\n  ext4: fix a syntax error in ext4_ext_insert_extent when debugging enabled\n  ext4: fix a typo in struct ext4_allocation_context\n  ext4: Don\u0027t normalize an falloc request if it can fit in 1 extent.\n  ext4: remove comments about extent mount option in ext4_new_inode()\n  ext4: let ext4_discard_partial_buffers handle unaligned range correctly\n  ext4: return ENOMEM if find_or_create_pages fails\n  ext4: move vars to local scope in ext4_discard_partial_page_buffers_no_lock()\n  ext4: Create helper function for EXT4_IO_END_UNWRITTEN and i_aiodio_unwritten\n  ext4: optimize locking for end_io extent conversion\n  ext4: remove unnecessary call to waitqueue_active()\n  ext4: Use correct locking for ext4_end_io_nolock()\n  ext4: fix race in xattr block allocation path\n  ext4: trace punch_hole correctly in ext4_ext_map_blocks\n  ext4: clean up AGGRESSIVE_TEST code\n  ext4: move variables to their scope\n  ext4: fix quota accounting during migration\n  ext4: migrate cleanup\n  ...\n"
    },
    {
      "commit": "a78ef704a8dd430225955f0709b22d4a6ba21deb",
      "tree": "ebd8f8a5a257077912b7cc38ecfdab43e1d7d73d",
      "parents": [
        "bfe8684869601dacfcb2cd69ef8cfd9045f62170"
      ],
      "author": {
        "name": "Miklos Szeredi",
        "email": "mszeredi@suse.cz",
        "time": "Fri Oct 28 14:13:30 2011 +0200"
      },
      "committer": {
        "name": "Christoph Hellwig",
        "email": "hch@serles.lst.de",
        "time": "Wed Nov 02 12:53:43 2011 +0100"
      },
      "message": "vfs: protect i_nlink\n\nPrevent direct modification of i_nlink by making it const and adding a\nnon-const __i_nlink alias.\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nTested-by: Toshiyuki Okajima \u003ctoshi.okajima@jp.fujitsu.com\u003e\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\n"
    },
    {
      "commit": "bfe8684869601dacfcb2cd69ef8cfd9045f62170",
      "tree": "4e213aaa766b26f43f0f9ec7998a7745239d9377",
      "parents": [
        "6d6b77f163c7eabedbba00ed2abb7d4a570bff76"
      ],
      "author": {
        "name": "Miklos Szeredi",
        "email": "mszeredi@suse.cz",
        "time": "Fri Oct 28 14:13:29 2011 +0200"
      },
      "committer": {
        "name": "Christoph Hellwig",
        "email": "hch@serles.lst.de",
        "time": "Wed Nov 02 12:53:43 2011 +0100"
      },
      "message": "filesystems: add set_nlink()\n\nReplace remaining direct i_nlink updates with a new set_nlink()\nupdater function.\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nTested-by: Toshiyuki Okajima \u003ctoshi.okajima@jp.fujitsu.com\u003e\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\n"
    },
    {
      "commit": "b9075fa968a0a4347aef35e235e2995c0e57dddd",
      "tree": "cf9f9716784e790d8a43339653256d9cf9178ff3",
      "parents": [
        "ae29bc92da01a2e9d278a9a58c3b307d41cc0254"
      ],
      "author": {
        "name": "Joe Perches",
        "email": "joe@perches.com",
        "time": "Mon Oct 31 17:11:33 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Oct 31 17:30:54 2011 -0700"
      },
      "message": "treewide: use __printf not __attribute__((format(printf,...)))\n\nStandardize the style for compiler based printf format verification.\nStandardized the location of __printf too.\n\nDone via script and a little typing.\n\n$ grep -rPl --include\u003d*.[ch] -w \"__attribute__\" * | \\\n  grep -vP \"^(tools|scripts|include/linux/compiler-gcc.h)\" | \\\n  xargs perl -n -i -e \u0027local $/; while (\u003c\u003e) { s/\\b__attribute__\\s*\\(\\s*\\(\\s*format\\s*\\(\\s*printf\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*\\)\\s*\\)\\s*\\)/__printf($1, $2)/g ; print; }\u0027\n\n[akpm@linux-foundation.org: revert arch bits]\nSigned-off-by: Joe Perches \u003cjoe@perches.com\u003e\nCc: \"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": "fcf634098c00dd9cd247447368495f0b79be12d1",
      "tree": "77fc98cd461bd52ba3b14e833d54a115ffbbd7bc",
      "parents": [
        "32ea845d5bafc37b7406bea1aee3005407cb0900"
      ],
      "author": {
        "name": "Christopher Yeoh",
        "email": "cyeoh@au1.ibm.com",
        "time": "Mon Oct 31 17:06:39 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Oct 31 17:30:44 2011 -0700"
      },
      "message": "Cross Memory Attach\n\nThe basic idea behind cross memory attach is to allow MPI programs doing\nintra-node communication to do a single copy of the message rather than a\ndouble copy of the message via shared memory.\n\nThe following patch attempts to achieve this by allowing a destination\nprocess, given an address and size from a source process, to copy memory\ndirectly from the source process into its own address space via a system\ncall.  There is also a symmetrical ability to copy from the current\nprocess\u0027s address space into a destination process\u0027s address space.\n\n- Use of /proc/pid/mem has been considered, but there are issues with\n  using it:\n  - Does not allow for specifying iovecs for both src and dest, assuming\n    preadv or pwritev was implemented either the area read from or\n  written to would need to be contiguous.\n  - Currently mem_read allows only processes who are currently\n  ptrace\u0027ing the target and are still able to ptrace the target to read\n  from the target. This check could possibly be moved to the open call,\n  but its not clear exactly what race this restriction is stopping\n  (reason  appears to have been lost)\n  - Having to send the fd of /proc/self/mem via SCM_RIGHTS on unix\n  domain socket is a bit ugly from a userspace point of view,\n  especially when you may have hundreds if not (eventually) thousands\n  of processes  that all need to do this with each other\n  - Doesn\u0027t allow for some future use of the interface we would like to\n  consider adding in the future (see below)\n  - Interestingly reading from /proc/pid/mem currently actually\n  involves two copies! (But this could be fixed pretty easily)\n\nAs mentioned previously use of vmsplice instead was considered, but has\nproblems.  Since you need the reader and writer working co-operatively if\nthe pipe is not drained then you block.  Which requires some wrapping to\ndo non blocking on the send side or polling on the receive.  In all to all\ncommunication it requires ordering otherwise you can deadlock.  And in the\nexample of many MPI tasks writing to one MPI task vmsplice serialises the\ncopying.\n\nThere are some cases of MPI collectives where even a single copy interface\ndoes not get us the performance gain we could.  For example in an\nMPI_Reduce rather than copy the data from the source we would like to\ninstead use it directly in a mathops (say the reduce is doing a sum) as\nthis would save us doing a copy.  We don\u0027t need to keep a copy of the data\nfrom the source.  I haven\u0027t implemented this, but I think this interface\ncould in the future do all this through the use of the flags - eg could\nspecify the math operation and type and the kernel rather than just\ncopying the data would apply the specified operation between the source\nand destination and store it in the destination.\n\nAlthough we don\u0027t have a \"second user\" of the interface (though I\u0027ve had\nsome nibbles from people who may be interested in using it for intra\nprocess messaging which is not MPI).  This interface is something which\nhardware vendors are already doing for their custom drivers to implement\nfast local communication.  And so in addition to this being useful for\nOpenMPI it would mean the driver maintainers don\u0027t have to fix things up\nwhen the mm changes.\n\nThere was some discussion about how much faster a true zero copy would\ngo. Here\u0027s a link back to the email with some testing I did on that:\n\nhttp://marc.info/?l\u003dlinux-mm\u0026m\u003d130105930902915\u0026w\u003d2\n\nThere is a basic man page for the proposed interface here:\n\nhttp://ozlabs.org/~cyeoh/cma/process_vm_readv.txt\n\nThis has been implemented for x86 and powerpc, other architecture should\nmainly (I think) just need to add syscall numbers for the process_vm_readv\nand process_vm_writev. There are 32 bit compatibility versions for\n64-bit kernels.\n\nFor arch maintainers there are some simple tests to be able to quickly\nverify that the syscalls are working correctly here:\n\nhttp://ozlabs.org/~cyeoh/cma/cma-test-20110718.tgz\n\nSigned-off-by: Chris Yeoh \u003cyeohc@au1.ibm.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: \"H. Peter Anvin\" \u003chpa@zytor.com\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Arnd Bergmann \u003carnd@arndb.de\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: David Howells \u003cdhowells@redhat.com\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nCc: \u003clinux-man@vger.kernel.org\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": "6cdbb0effc2f511ced23e46f2117e4b31d3d4a50",
      "tree": "a440c35498abfd171b619a398f1cee1b62be8219",
      "parents": [
        "80e675f906db54eb1ce3a9555cee5f45b5b72ab2"
      ],
      "author": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Sat Oct 29 08:24:18 2011 -0400"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Sat Oct 29 08:24:18 2011 -0400"
      },
      "message": "fs: optimize out 16 bytes worth of padding in struct inode\n\nRearrange the fields in struct inode so that on an x86_64 system,\nfields that require 8-byte alignment don\u0027t end up causing 4-byte holes\nin the structure.  It reduces the size of struct inode from 568 bytes\nto 552 bytes.\n\nAlso move the fields protected by i_lock (i_blocks, i_bytes, and\ni_size) into the same cache line as i_lock.\n\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "f362f98e7c445643d27c610bb7a86b79727b592e",
      "tree": "399d9ebccdfbdfe9690ab1403a001d6f08e54b41",
      "parents": [
        "f793f2961170c0b49c1650e69e7825484159ce62",
        "f3c7691e8d30d88899b514675c7c86d19057b5fd"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Oct 28 10:49:34 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Oct 28 10:49:34 2011 -0700"
      },
      "message": "Merge branch \u0027for-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/hch/vfs-queue\n\n* \u0027for-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/hch/vfs-queue: (21 commits)\n  leases: fix write-open/read-lease race\n  nfs: drop unnecessary locking in llseek\n  ext4: replace cut\u0027n\u0027pasted llseek code with generic_file_llseek_size\n  vfs: add generic_file_llseek_size\n  vfs: do (nearly) lockless generic_file_llseek\n  direct-io: merge direct_io_walker into __blockdev_direct_IO\n  direct-io: inline the complete submission path\n  direct-io: separate map_bh from dio\n  direct-io: use a slab cache for struct dio\n  direct-io: rearrange fields in dio/dio_submit to avoid holes\n  direct-io: fix a wrong comment\n  direct-io: separate fields only used in the submission path from struct dio\n  vfs: fix spinning prevention in prune_icache_sb\n  vfs: add a comment to inode_permission()\n  vfs: pass all mask flags check_acl and posix_acl_permission\n  vfs: add hex format for MAY_* flag values\n  vfs: indicate that the permission functions take all the MAY_* flags\n  compat: sync compat_stats with statfs.\n  vfs: add \"device\" tag to /proc/self/mountstats\n  cleanup: vfs: small comment fix for block_invalidatepage\n  ...\n\nFix up trivial conflict in fs/gfs2/file.c (llseek changes)\n"
    },
    {
      "commit": "5760495a872d63a182962680a13c2af29235237c",
      "tree": "ab7ac2b0ec66006efbc27c318c89474a63d6e4d1",
      "parents": [
        "ef3d0fd27e90f67e35da516dafc1482c82939a60"
      ],
      "author": {
        "name": "Andi Kleen",
        "email": "ak@linux.intel.com",
        "time": "Thu Sep 15 16:06:50 2011 -0700"
      },
      "committer": {
        "name": "root",
        "email": "root@serles.lst.de",
        "time": "Fri Oct 28 14:58:59 2011 +0200"
      },
      "message": "vfs: add generic_file_llseek_size\n\nAdd a generic_file_llseek variant to the VFS that allows passing in\nthe maximum file size of the file system, instead of always\nusing maxbytes from the superblock.\n\nThis can be used to eliminate some cut\u0027n\u0027paste seek code in ext4.\n\nSigned-off-by: Andi Kleen \u003cak@linux.intel.com\u003e\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\n"
    },
    {
      "commit": "ef3d0fd27e90f67e35da516dafc1482c82939a60",
      "tree": "dea852eab2a52782867becffb11bce2577ed2b91",
      "parents": [
        "847cc6371ba820763773e993000410d6d8d23515"
      ],
      "author": {
        "name": "Andi Kleen",
        "email": "ak@linux.intel.com",
        "time": "Thu Sep 15 16:06:48 2011 -0700"
      },
      "committer": {
        "name": "root",
        "email": "root@serles.lst.de",
        "time": "Fri Oct 28 14:58:58 2011 +0200"
      },
      "message": "vfs: do (nearly) lockless generic_file_llseek\n\nThe i_mutex lock use of generic _file_llseek hurts.  Independent processes\naccessing the same file synchronize over a single lock, even though\nthey have no need for synchronization at all.\n\nUnder high utilization this can cause llseek to scale very poorly on larger\nsystems.\n\nThis patch does some rethinking of the llseek locking model:\n\nFirst the 64bit f_pos is not necessarily atomic without locks\non 32bit systems. This can already cause races with read() today.\nThis was discussed on linux-kernel in the past and deemed acceptable.\nThe patch does not change that.\n\nLet\u0027s look at the different seek variants:\n\nSEEK_SET: Doesn\u0027t really need any locking.\nIf there\u0027s a race one writer wins, the other loses.\n\nFor 32bit the non atomic update races against read()\nstay the same. Without a lock they can also happen\nagainst write() now.  The read() race was deemed\nacceptable in past discussions, and I think if it\u0027s\nok for read it\u0027s ok for write too.\n\n\u003d\u003e Don\u0027t need a lock.\n\nSEEK_END: This behaves like SEEK_SET plus it reads\nthe maximum size too. Reading the maximum size would have the\n32bit atomic problem. But luckily we already have a way to read\nthe maximum size without locking (i_size_read), so we\ncan just use that instead.\n\nWithout i_mutex there is no synchronization with write() anymore,\nhowever since the write() update is atomic on 64bit it just behaves\nlike another racy SEEK_SET.  On non atomic 32bit it\u0027s the same\nas SEEK_SET.\n\n\u003d\u003e Don\u0027t need a lock, but need to use i_size_read()\n\nSEEK_CUR: This has a read-modify-write race window\non the same file. One could argue that any application\ndoing unsynchronized seeks on the same file is already broken.\nBut for the sake of not adding a regression here I\u0027m\nusing the file-\u003ef_lock to synchronize this. Using this\nlock is much better than the inode mutex because it doesn\u0027t\nsynchronize between processes.\n\n\u003d\u003e So still need a lock, but can use a f_lock.\n\nThis patch implements this new scheme in generic_file_llseek.\nI dropped generic_file_llseek_unlocked and changed all callers.\n\nSigned-off-by: Andi Kleen \u003cak@linux.intel.com\u003e\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\n"
    },
    {
      "commit": "8522ca5818652c4da6808c66a307abce75462212",
      "tree": "dd127ea11faf379c3b4610eb9f15feee79cb802f",
      "parents": [
        "8fd90c8d1dacb5ff0f372217c97f57a9e61559cd"
      ],
      "author": {
        "name": "Aneesh Kumar K.V",
        "email": "aneesh.kumar@linux.vnet.ibm.com",
        "time": "Sun Oct 23 23:13:31 2011 +0530"
      },
      "committer": {
        "name": "root",
        "email": "root@serles.lst.de",
        "time": "Fri Oct 28 14:58:54 2011 +0200"
      },
      "message": "vfs: add hex format for MAY_* flag values\n\nWe are going to add more flags and having them in hex format\nmake it simpler\n\nAcked-by: J. Bruce Fields \u003cbfields@redhat.com\u003e\nAcked-by: David Howells \u003cdhowells@redhat.com\u003e\nSigned-off-by: Aneesh Kumar K.V \u003caneesh.kumar@linux.vnet.ibm.com\u003e\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\n"
    },
    {
      "commit": "1442d1678ca7e53574fd403ba7bee6f4125d920c",
      "tree": "fd053a849158d2c5b8345ced8982108825b85736",
      "parents": [
        "7e0bb71e75020348bee523720a0c2f04cc72f540",
        "345c284290cabb5484df909303e73d6def8ec8ec"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Oct 25 15:42:01 2011 +0200"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Oct 25 15:42:01 2011 +0200"
      },
      "message": "Merge branch \u0027for-3.2\u0027 of git://linux-nfs.org/~bfields/linux\n\n* \u0027for-3.2\u0027 of git://linux-nfs.org/~bfields/linux: (103 commits)\n  nfs41: implement DESTROY_CLIENTID operation\n  nfsd4: typo logical vs bitwise negate for want_mask\n  nfsd4: allow NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED\n  nfsd4: seq-\u003estatus_flags may be used unitialized\n  nfsd41: use SEQ4_STATUS_BACKCHANNEL_FAULT when cb_sequence is invalid\n  nfsd4: implement new 4.1 open reclaim types\n  nfsd4: remove unneeded CLAIM_DELEGATE_CUR workaround\n  nfsd4: warn on open failure after create\n  nfsd4: preallocate open stateid in process_open1()\n  nfsd4: do idr preallocation with stateid allocation\n  nfsd4: preallocate nfs4_file in process_open1()\n  nfsd4: clean up open owners on OPEN failure\n  nfsd4: simplify process_open1 logic\n  nfsd4: make is_open_owner boolean\n  nfsd4: centralize renew_client() calls\n  nfsd4: typo logical vs bitwise negate\n  nfs: fix bug about IPv6 address scope checking\n  nfsd4: more robust ignoring of WANT bits in OPEN\n  nfsd4: move name-length checks to xdr\n  nfsd4: move access/deny validity checks to xdr code\n  ...\n"
    },
    {
      "commit": "fed678dc8a8b839c8189b5d889a94e865cd327dd",
      "tree": "d2bf10d2a4e4ca0a27ccd6f7ae40e8e259acfcfc",
      "parents": [
        "808bf29b9195c52239b9aaeda7c6082a0ddf07c6",
        "6c4867f6469964e34c5f4ee229a2a7f71a34c7ff"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Sep 21 13:20:21 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Sep 21 13:20:21 2011 -0700"
      },
      "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.dk/linux-block\n\n* \u0027for-linus\u0027 of git://git.kernel.dk/linux-block:\n  floppy: use del_timer_sync() in init cleanup\n  blk-cgroup: be able to remove the record of unplugged device\n  block: Don\u0027t check QUEUE_FLAG_SAME_COMP in __blk_complete_request\n  mm: Add comment explaining task state setting in bdi_forker_thread()\n  mm: Cleanup clearing of BDI_pending bit in bdi_forker_thread()\n  block: simplify force plug flush code a little bit\n  block: change force plug flush call order\n  block: Fix queue_flag update when rq_affinity goes from 2 to 1\n  block: separate priority boosting from REQ_META\n  block: remove READ_META and WRITE_META\n  xen-blkback: fixed indentation and comments\n  xen-blkback: Don\u0027t disconnect backend until state switched to XenbusStateClosed.\n"
    },
    {
      "commit": "e096d0c7e2e4e5893792db865dd065ac73cf1f00",
      "tree": "20e603f81a9f1a55d330cba670952b991d564e00",
      "parents": [
        "e33f2d238e2e53e264c758c0849423a9308eb63e"
      ],
      "author": {
        "name": "Josh Boyer",
        "email": "jwboyer@redhat.com",
        "time": "Thu Aug 25 07:48:12 2011 -0400"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Thu Aug 25 10:50:18 2011 -0700"
      },
      "message": "lockdep: Add helper function for dir vs file i_mutex annotation\n\nPurely in-memory filesystems do not use the inode hash as the dcache\ntells us if an entry already exists.  As a result, they do not call\nunlock_new_inode, and thus directory inodes do not get put into a\ndifferent lockdep class for i_sem.\n\nWe need the different lockdep classes, because the locking order for\ni_mutex is different for directory inodes and regular inodes.  Directory\ninodes can do \"readdir()\", which takes i_mutex *before* possibly taking\nmm-\u003emmap_sem (due to a page fault while copying the directory entry to\nuser space).\n\nIn contrast, regular inodes can be mmap\u0027ed, which takes mm-\u003emmap_sem\nbefore accessing i_mutex.\n\nThe two cases can never happen for the same inode, so no real deadlock\ncan occur, but without the different lockdep classes, lockdep cannot\nunderstand that.  As a result, if CONFIG_DEBUG_LOCK_ALLOC is set, this\ncan lead to false positives from lockdep like below:\n\n    find/645 is trying to acquire lock:\n     (\u0026mm-\u003emmap_sem){++++++}, at: [\u003cffffffff81109514\u003e] might_fault+0x5c/0xac\n\n    but task is already holding lock:\n     (\u0026sb-\u003es_type-\u003ei_mutex_key#15){+.+.+.}, at: [\u003cffffffff81149f34\u003e]\n    vfs_readdir+0x5b/0xb4\n\n    which lock already depends on the new lock.\n\n    the existing dependency chain (in reverse order) is:\n\n    -\u003e #1 (\u0026sb-\u003es_type-\u003ei_mutex_key#15){+.+.+.}:\n          [\u003cffffffff8108ac26\u003e] lock_acquire+0xbf/0x103\n          [\u003cffffffff814db822\u003e] __mutex_lock_common+0x4c/0x361\n          [\u003cffffffff814dbc46\u003e] mutex_lock_nested+0x40/0x45\n          [\u003cffffffff811daa87\u003e] hugetlbfs_file_mmap+0x82/0x110\n          [\u003cffffffff81111557\u003e] mmap_region+0x258/0x432\n          [\u003cffffffff811119dd\u003e] do_mmap_pgoff+0x2ac/0x306\n          [\u003cffffffff81111b4f\u003e] sys_mmap_pgoff+0x118/0x16a\n          [\u003cffffffff8100c858\u003e] sys_mmap+0x22/0x24\n          [\u003cffffffff814e3ec2\u003e] system_call_fastpath+0x16/0x1b\n\n    -\u003e #0 (\u0026mm-\u003emmap_sem){++++++}:\n          [\u003cffffffff8108a4bc\u003e] __lock_acquire+0xa1a/0xcf7\n          [\u003cffffffff8108ac26\u003e] lock_acquire+0xbf/0x103\n          [\u003cffffffff81109541\u003e] might_fault+0x89/0xac\n          [\u003cffffffff81149cff\u003e] filldir+0x6f/0xc7\n          [\u003cffffffff811586ea\u003e] dcache_readdir+0x67/0x205\n          [\u003cffffffff81149f54\u003e] vfs_readdir+0x7b/0xb4\n          [\u003cffffffff8114a073\u003e] sys_getdents+0x7e/0xd1\n          [\u003cffffffff814e3ec2\u003e] system_call_fastpath+0x16/0x1b\n\nThis patch moves the directory vs file lockdep annotation into a helper\nfunction that can be called by in-memory filesystems and has hugetlbfs\ncall it.\n\nSigned-off-by: Josh Boyer \u003cjwboyer@redhat.com\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "5dc06c5a70b79a323152bec7e55783e705767e63",
      "tree": "8f008edc8574ecda04ee6deb13d69b489e8250b6",
      "parents": [
        "fcb8ce5cfe30ca9ca5c9a79cdfe26d1993e65e0c"
      ],
      "author": {
        "name": "Christoph Hellwig",
        "email": "hch@infradead.org",
        "time": "Tue Aug 23 14:49:55 2011 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jaxboe@fusionio.com",
        "time": "Tue Aug 23 14:49:55 2011 +0200"
      },
      "message": "block: remove READ_META and WRITE_META\n\nReplace all occurnanced of the undocumented READ_META with READ | REQ_META\nand remove the unused WRITE_META define.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Jens Axboe \u003cjaxboe@fusionio.com\u003e\n"
    },
    {
      "commit": "778fc546f749c588aa2f6cd50215d2715c374252",
      "tree": "b3ffa04327884cd0491c3ee1677f0ffc589ebe9c",
      "parents": [
        "710b7216964d6455cf1b215c43b03a1a79008c7d"
      ],
      "author": {
        "name": "J. Bruce Fields",
        "email": "bfields@redhat.com",
        "time": "Tue Jul 26 18:25:49 2011 -0400"
      },
      "committer": {
        "name": "J. Bruce Fields",
        "email": "bfields@redhat.com",
        "time": "Fri Aug 19 13:25:34 2011 -0400"
      },
      "message": "locks: fix tracking of inprogress lease breaks\n\nWe currently use a bit in fl_flags to record whether a lease is being\nbroken, and set fl_type to the type (RDLCK or UNLCK) that it will\neventually have.  This means that once the lease break starts, we forget\nwhat the lease\u0027s type *used* to be.  Breaking a read lease will then\nresult in blocking read opens, even though there\u0027s no conflict--because\nthe lease type is now F_UNLCK and we can no longer tell whether it was\npreviously a read or write lease.\n\nSo, instead keep fl_type as the original type (the type which we\nenforce), and keep track of whether we\u0027re unlocking or merely\ndowngrading by replacing the single FL_INPROGRESS flag by\nFL_UNLOCK_PENDING and FL_DOWNGRADE_PENDING flags.\n\nTo get this right we also need to track separate downgrade and break\ntimes, to handle the case where a write-leased file gets conflicting\nopens first for read, then later for write.\n\n(I first considered just eliminating the downgrade behavior\ncompletely--nfsv4 doesn\u0027t need it, and nobody as far as I can tell\nactually uses it currently--but Jeremy Allison tells me that Windows\noplocks do behave this way, so Samba will probably use this some day.)\n\nReviewed-by: Jeff Layton \u003cjlayton@redhat.com\u003e\nSigned-off-by: J. Bruce Fields \u003cbfields@redhat.com\u003e\n"
    },
    {
      "commit": "710b7216964d6455cf1b215c43b03a1a79008c7d",
      "tree": "b0b356e3256ba52838a6373c4791721820d8fdaa",
      "parents": [
        "ab83fa4b49a54e6199b076b7d8c1808144e80f0d"
      ],
      "author": {
        "name": "J. Bruce Fields",
        "email": "bfields@redhat.com",
        "time": "Tue Jul 26 16:28:29 2011 -0400"
      },
      "committer": {
        "name": "J. Bruce Fields",
        "email": "bfields@redhat.com",
        "time": "Fri Aug 19 13:25:34 2011 -0400"
      },
      "message": "locks: move F_INPROGRESS from fl_type to fl_flags field\n\nF_INPROGRESS isn\u0027t exposed to userspace.  To me it makes more sense in\nfl_flags....\n\nReviewed-by: Jeff Layton \u003cjlayton@redhat.com\u003e\nSigned-off-by: J. Bruce Fields \u003cbfields@redhat.com\u003e\n"
    },
    {
      "commit": "3ddcd0569cd68f00f3beae9a7959b72918bb91f4",
      "tree": "3f7c591316560b1c22e2cc0700fbcd29aa3fbd7f",
      "parents": [
        "830c0f0edca67403d361fe976a25b17356c11f19"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Aug 06 22:45:50 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Aug 06 22:53:23 2011 -0700"
      },
      "message": "vfs: optimize inode cache access patterns\n\nThe inode structure layout is largely random, and some of the vfs paths\nreally do care.  The path lookup in particular is already quite D$\nintensive, and profiles show that accessing the \u0027inode-\u003ei_op-\u003exyz\u0027\nfields is quite costly.\n\nWe already optimized the dcache to not unnecessarily load the d_op\nstructure for members that are often NULL using the DCACHE_OP_xyz bits\nin dentry-\u003ed_flags, and this does something very similar for the inode\nops that are used during pathname lookup.\n\nIt also re-orders the fields so that the fields accessed by \u0027stat\u0027 are\ntogether at the beginning of the inode structure, and roughly in the\norder accessed.\n\nThe effect of this seems to be in the 1-2% range for an empty kernel\n\"make -j\" run (which is fairly kernel-intensive, mostly in filename\nlookup), so it\u0027s visible.  The numbers are fairly noisy, though, and\nlikely depend a lot on exact microarchitecture.  So there\u0027s more tuning\nto be done.\n\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "f2ee7abf4c40c8e6bffced923a7c01ea2d1f6c97",
      "tree": "3c7ec119cf89f82737c55235ff7881ebeed9408f",
      "parents": [
        "b12362bdb61a230a67daa77bcd2a11e59b2802e1"
      ],
      "author": {
        "name": "Eric Dumazet",
        "email": "eric.dumazet@gmail.com",
        "time": "Thu Jul 28 06:41:09 2011 +0200"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Aug 01 01:41:17 2011 -0400"
      },
      "message": "vfs: avoid taking inode_hash_lock on pipes and sockets\n\nSome inodes (pipes, sockets, ...) are not hashed, no need to take\ncontended inode_hash_lock at dismantle time.\n\nnice speedup on SMP machines on socket intensive workloads.\n\nSigned-off-by: Eric Dumazet \u003ceric.dumazet@gmail.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "e371d46ae45488bcb112a99a7de462e9e3aa6764",
      "tree": "9e2eceb292018e52304053bd8013cdb0a7f31dcc",
      "parents": [
        "b0189cd087aa82bd23277cb5c8960ab030e13e5c",
        "e57712ebebbb9db7d8dcef216437b3171ddcf115"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Jul 26 18:30:20 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Jul 26 18:30:20 2011 -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  merge fchmod() and fchmodat() guts, kill ancient broken kludge\n  xfs: fix misspelled S_IS...()\n  xfs: get rid of open-coded S_ISREG(), etc.\n  vfs: document locking requirements for d_move, __d_move and d_materialise_unique\n  omfs: fix (mode \u0026 S_IFDIR) abuse\n  btrfs: S_ISREG(mode) is not mode \u0026 S_IFREG...\n  ima: fmode_t misspelled as mode_t...\n  pci-label.c: size_t misspelled as mode_t\n  jffs2: S_ISLNK(mode \u0026 S_IFMT) is pointless\n  snd_msnd -\u003emode is fmode_t, not mode_t\n  v9fs_iop_get_acl: get rid of unused variable\n  vfs: dont chain pipe/anon/socket on superblock s_inodes list\n  Documentation: Exporting: update description of d_splice_alias\n  fs: add missing unlock in default_llseek()\n"
    },
    {
      "commit": "a209dfc7b0d94bd6fa94553c097836a2e6d0f0ba",
      "tree": "7dacc92b08264c675a0dfcbae83982b7d3ad5135",
      "parents": [
        "5b9f4567726513a359e70f85029482c7c3714dbd"
      ],
      "author": {
        "name": "Eric Dumazet",
        "email": "eric.dumazet@gmail.com",
        "time": "Tue Jul 26 11:36:34 2011 +0200"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jul 26 12:57:09 2011 -0400"
      },
      "message": "vfs: dont chain pipe/anon/socket on superblock s_inodes list\n\nWorkloads using pipes and sockets hit inode_sb_list_lock contention.\n\nsuperblock s_inodes list is needed for quota, dirty, pagecache and\nfsnotify management. pipe/anon/socket fs are clearly not candidates for\nthese.\n\nSigned-off-by: Eric Dumazet \u003ceric.dumazet@gmail.com\u003e\nReviewed-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "2dad3206db5c3832cde1f58650027fea3ff7adf3",
      "tree": "96314a554afdab5904a939793156d4ae23ec11c1",
      "parents": [
        "84635d68be4b846ba984a89f386524153330c597",
        "0c12eaffdf09466f36a9ffe970dda8f4aeb6efc0"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jul 25 22:49:19 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jul 25 22:49:19 2011 -0700"
      },
      "message": "Merge branch \u0027for-3.1\u0027 of git://linux-nfs.org/~bfields/linux\n\n* \u0027for-3.1\u0027 of git://linux-nfs.org/~bfields/linux:\n  nfsd: don\u0027t break lease on CLAIM_DELEGATE_CUR\n  locks: rename lock-manager ops\n  nfsd4: update nfsv4.1 implementation notes\n  nfsd: turn on reply cache for NFSv4\n  nfsd4: call nfsd4_release_compoundargs from pc_release\n  nfsd41: Deny new lock before RECLAIM_COMPLETE done\n  fs: locks: remove init_once\n  nfsd41: check the size of request\n  nfsd41: error out when client sets maxreq_sz or maxresp_sz too small\n  nfsd4: fix file leak on open_downgrade\n  nfsd4: remember to put RW access on stateid destruction\n  NFSD: Added TEST_STATEID operation\n  NFSD: added FREE_STATEID operation\n  svcrpc: fix list-corrupting race on nfsd shutdown\n  rpc: allow autoloading of gss mechanisms\n  svcauth_unix.c: quiet sparse noise\n  svcsock.c: include sunrpc.h to quiet sparse noise\n  nfsd: Remove deprecated nfsctl system call and related code.\n  NFSD: allow OP_DESTROY_CLIENTID to be only op in COMPOUND\n\nFix up trivial conflicts in Documentation/feature-removal-schedule.txt\n"
    },
    {
      "commit": "d3ec4844d449cf7af9e749f73ba2052fb7b72fc2",
      "tree": "c515913e85f7e50878c83da2a88bc5a7269d087c",
      "parents": [
        "0003230e8200699860f0b10af524dc47bf8aecad",
        "df2e301fee3c2c2a87592151397ad7699bb14c37"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jul 25 13:56:39 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jul 25 13:56:39 2011 -0700"
      },
      "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (43 commits)\n  fs: Merge split strings\n  treewide: fix potentially dangerous trailing \u0027;\u0027 in #defined values/expressions\n  uwb: Fix misspelling of neighbourhood in comment\n  net, netfilter: Remove redundant goto in ebt_ulog_packet\n  trivial: don\u0027t touch files that are removed in the staging tree\n  lib/vsprintf: replace link to Draft by final RFC number\n  doc: Kconfig: `to be\u0027 -\u003e `be\u0027\n  doc: Kconfig: Typo: square -\u003e squared\n  doc: Konfig: Documentation/power/{pm \u003d\u003e apm-acpi}.txt\n  drivers/net: static should be at beginning of declaration\n  drivers/media: static should be at beginning of declaration\n  drivers/i2c: static should be at beginning of declaration\n  XTENSA: static should be at beginning of declaration\n  SH: static should be at beginning of declaration\n  MIPS: static should be at beginning of declaration\n  ARM: static should be at beginning of declaration\n  rcu: treewide: Do not use rcu_read_lock_held when calling rcu_dereference_check\n  Update my e-mail address\n  PCIe ASPM: forcedly -\u003e forcibly\n  gma500: push through device driver tree\n  ...\n\nFix up trivial conflicts:\n - arch/arm/mach-ep93xx/dma-m2p.c (deleted)\n - drivers/gpio/gpio-ep93xx.c (renamed and context nearby)\n - drivers/net/r8169.c (just context changes)\n"
    },
    {
      "commit": "0003230e8200699860f0b10af524dc47bf8aecad",
      "tree": "8addb0c889b32111d6973c46cd3d0a5b5c17606c",
      "parents": [
        "4b478cedcdc1b2d131170f22bd3f916e53472f52",
        "4e34e719e457f2e031297175410fc0bd4016a085"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jul 25 12:53:15 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jul 25 12:53:15 2011 -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  fs: take the ACL checks to common code\n  bury posix_acl_..._masq() variants\n  kill boilerplates around posix_acl_create_masq()\n  generic_acl: no need to clone acl just to push it to set_cached_acl()\n  kill boilerplate around posix_acl_chmod_masq()\n  reiserfs: cache negative ACLs for v1 stat format\n  xfs: cache negative ACLs if there is no attribute fork\n  9p: do no return 0 from -\u003echeck_acl without actually checking\n  vfs: move ACL cache lookup into generic code\n  CIFS: Fix oops while mounting with prefixpath\n  xfs: Fix wrong return value of xfs_file_aio_write\n  fix devtmpfs race\n  caam: don\u0027t pass bogus S_IFCHR to debugfs_create_...()\n  get rid of create_proc_entry() abuses - proc_mkdir() is there for purpose\n  asus-wmi: -\u003eis_visible() can\u0027t return negative\n  fix jffs2 ACLs on big-endian with 16bit mode_t\n  9p: close ACL leaks\n  ocfs2_init_acl(): fix a leak\n  VFS : mount lock scalability for internal mounts\n"
    },
    {
      "commit": "4e34e719e457f2e031297175410fc0bd4016a085",
      "tree": "ab969a371e0d2efc6bfbf503ca6cdfce3af3bf6c",
      "parents": [
        "edde854e8bb34a7f32fa993d721f1da0faf64165"
      ],
      "author": {
        "name": "Christoph Hellwig",
        "email": "hch@lst.de",
        "time": "Sat Jul 23 17:37:31 2011 +0200"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Jul 25 14:30:23 2011 -0400"
      },
      "message": "fs: take the ACL checks to common code\n\nReplace the -\u003echeck_acl method with a -\u003eget_acl method that simply reads an\nACL from disk after having a cache miss.  This means we can replace the ACL\nchecking boilerplate code with a single implementation in namei.c.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "096a705bbc080a4041636d07514560da8d78acbe",
      "tree": "38c3c01225709ffa53419083ea6332f8a72610de",
      "parents": [
        "fea80311a939a746533a6d7e7c3183729d6a3faf",
        "5757a6d76cdf6dda2a492c09b985c015e86779b1"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jul 25 10:33:36 2011 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Jul 25 10:33:36 2011 -0700"
      },
      "message": "Merge branch \u0027for-3.1/core\u0027 of git://git.kernel.dk/linux-block\n\n* \u0027for-3.1/core\u0027 of git://git.kernel.dk/linux-block: (24 commits)\n  block: strict rq_affinity\n  backing-dev: use synchronize_rcu_expedited instead of synchronize_rcu\n  block: fix patch import error in max_discard_sectors check\n  block: reorder request_queue to remove 64 bit alignment padding\n  CFQ: add think time check for group\n  CFQ: add think time check for service tree\n  CFQ: move think time check variables to a separate struct\n  fixlet: Remove fs_excl from struct task.\n  cfq: Remove special treatment for metadata rqs.\n  block: document blk_plug list access\n  block: avoid building too big plug list\n  compat_ioctl: fix make headers_check regression\n  block: eliminate potential for infinite loop in blkdev_issue_discard\n  compat_ioctl: fix warning caused by qemu\n  block: flush MEDIA_CHANGE from drivers on close(2)\n  blk-throttle: Make total_nr_queued unsigned\n  block: Add __attribute__((format(printf...) and fix fallout\n  fs/partitions/check.c: make local symbols static\n  block:remove some spare spaces in genhd.c\n  block:fix the comment error in blkdev.h\n  ...\n"
    },
    {
      "commit": "423e0ab086ad8b33626e45fa94ac7613146b7ffa",
      "tree": "249c9337a02254fe5dbede7436f78dfcc1ec508f",
      "parents": [
        "bbd9d6f7fbb0305c9a592bf05a32e87eb364a4ff"
      ],
      "author": {
        "name": "Tim Chen",
        "email": "tim.c.chen@linux.intel.com",
        "time": "Tue Jul 19 09:32:38 2011 -0700"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Sun Jul 24 10:08:32 2011 -0400"
      },
      "message": "VFS : mount lock scalability for internal mounts\n\nFor a number of file systems that don\u0027t have a mount point (e.g. sockfs\nand pipefs), they are not marked as long term. Therefore in\nmntput_no_expire, all locks in vfs_mount lock are taken instead of just\nlocal cpu\u0027s lock to aggregate reference counts when we release\nreference to file objects.  In fact, only local lock need to have been\ntaken to update ref counts as these file systems are in no danger of\ngoing away until we are ready to unregister them.\n\nThe attached patch marks file systems using kern_mount without\nmount point as long term.  The contentions of vfs_mount lock\nis now eliminated.  Before un-registering such file system,\nkern_unmount should be called to remove the long term flag and\nmake the mount point ready to be freed.\n\nSigned-off-by: Tim Chen \u003ctim.c.chen@linux.intel.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "ed70afcd6e795e3de98df56f1cd0f898fbf641a7",
      "tree": "7d81e3e3e6b30fe8025d45aa6b81ea553095e701",
      "parents": [
        "295cc522c2b2834b302424e41ebb5846df6d61bd"
      ],
      "author": {
        "name": "Randy Dunlap",
        "email": "rdunlap@xenotime.net",
        "time": "Thu Jul 21 13:55:37 2011 -0700"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Fri Jul 22 19:41:19 2011 -0400"
      },
      "message": "mm/truncate.c: fix build for CONFIG_BLOCK not enabled\n\nFix build error when CONFIG_BLOCK is not enabled by providing a stub\ninode_dio_wait() function.\n\nmm/truncate.c:612: error: implicit declaration of function \u0027inode_dio_wait\u0027\n\nSigned-off-by: Randy Dunlap \u003crdunlap@xenotime.net\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "295cc522c2b2834b302424e41ebb5846df6d61bd",
      "tree": "b96c1f81f5f10695dc24ea54ec5bc12a94c844be",
      "parents": [
        "86c98e8cdb21ff4628f4d48559ab6e006380fa4b"
      ],
      "author": {
        "name": "Wanlong Gao",
        "email": "gaowanlong@cn.fujitsu.com",
        "time": "Tue Jul 19 09:48:39 2011 +0800"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 20:48:05 2011 -0400"
      },
      "message": "fs:update the NOTE of the file_operations structure\n\nBig kernel lock had been removed and setlease now use the lock_flocks()\nto hold a special spin lock file_lock_lock by Matthew.\nSo just remove the out-of-date NOTE.\n\nSigned-off-by: Wanlong Gao \u003cgaowanlong@cn.fujitsu.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "02c24a82187d5a628c68edfe71ae60dc135cd178",
      "tree": "c8dbaba4d82e2b20ed4335910a564a1f7d90fcf6",
      "parents": [
        "22735068d53c7115e384bc88dea95b17e76a6839"
      ],
      "author": {
        "name": "Josef Bacik",
        "email": "josef@redhat.com",
        "time": "Sat Jul 16 20:44:56 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 20:47:59 2011 -0400"
      },
      "message": "fs: push i_mutex and filemap_write_and_wait down into -\u003efsync() handlers\n\nBtrfs needs to be able to control how filemap_write_and_wait_range() is called\nin fsync to make it less of a painful operation, so push down taking i_mutex and\nthe calling of filemap_write_and_wait() down into the -\u003efsync() handlers.  Some\nfile systems can drop taking the i_mutex altogether it seems, like ext3 and\nocfs2.  For correctness sake I just pushed everything down in all cases to make\nsure that we keep the current behavior the same for everybody, and then each\nindividual fs maintainer can make up their mind about what to do from there.\nThanks,\n\nAcked-by: Jan Kara \u003cjack@suse.cz\u003e\nSigned-off-by: Josef Bacik \u003cjosef@redhat.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "982d816581eeeacfe5b2b7c6d47d13a157616eff",
      "tree": "1f1cb5725646e9de13969c8894b26ab3d5e3102e",
      "parents": [
        "b4d5b10fb2e3a4327838c07d8ebd9e350fcc133d"
      ],
      "author": {
        "name": "Josef Bacik",
        "email": "josef@redhat.com",
        "time": "Mon Jul 18 13:21:35 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 20:47:56 2011 -0400"
      },
      "message": "fs: add SEEK_HOLE and SEEK_DATA flags\n\nThis just gets us ready to support the SEEK_HOLE and SEEK_DATA flags.  Turns out\nusing fiemap in things like cp cause more problems than it solves, so lets try\nand give userspace an interface that doesn\u0027t suck.  We need to match solaris\nhere, and the definitions are\n\n*o* If /whence/ is SEEK_HOLE, the offset of the start of the\nnext hole greater than or equal to the supplied offset\nis returned. The definition of a hole is provided near\nthe end of the DESCRIPTION.\n\n*o* If /whence/ is SEEK_DATA, the file pointer is set to the\nstart of the next non-hole file region greater than or\nequal to the supplied offset.\n\nSo in the generic case the entire file is data and there is a virtual hole at\nthe end.  That means we will just return i_size for SEEK_HOLE and will return\nthe same offset for SEEK_DATA.  This is how Solaris does it so we have to do it\nthe same way.\n\nThanks,\n\nSigned-off-by: Josef Bacik \u003cjosef@redhat.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "aacfc19c626ebd3daa675652457d71019a1f583f",
      "tree": "9c1cfb5945e939f1ba56b4c0101c211e84e544c0",
      "parents": [
        "df2d6f26586f12a24f3ae5df4e236dc5c08d6eb4"
      ],
      "author": {
        "name": "Christoph Hellwig",
        "email": "hch@infradead.org",
        "time": "Fri Jun 24 14:29:47 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 20:47:49 2011 -0400"
      },
      "message": "fs: simplify the blockdev_direct_IO prototype\n\nSimple filesystems always pass inode-\u003ei_sb_bdev as the block device\nargument, and never need a end_io handler.  Let\u0027s simply things for\nthem and for my grepping activity by dropping these arguments.  The\nonly thing not falling into that scheme is ext4, which passes and\nend_io handler without needing special flags (yet), but given how\nmessy the direct I/O code there is use of __blockdev_direct_IO\nin one instead of two out of three cases isn\u0027t going to make a large\ndifference anyway.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "bd5fe6c5eb9c548d7f07fe8f89a150bb6705e8e3",
      "tree": "ef5341c7747f809aec7ae233f6e3ef90af39be5f",
      "parents": [
        "f9b5570d7fdedff32a2e78102bfb54cd1b12b289"
      ],
      "author": {
        "name": "Christoph Hellwig",
        "email": "hch@infradead.org",
        "time": "Fri Jun 24 14:29:43 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 20:47:46 2011 -0400"
      },
      "message": "fs: kill i_alloc_sem\n\ni_alloc_sem is a rather special rw_semaphore.  It\u0027s the last one that may\nbe released by a non-owner, and it\u0027s write side is always mirrored by\nreal exclusion.  It\u0027s intended use it to wait for all pending direct I/O\nrequests to finish before starting a truncate.\n\nReplace it with a hand-grown construct:\n\n - exclusion for truncates is already guaranteed by i_mutex, so it can\n   simply fall way\n - the reader side is replaced by an i_dio_count member in struct inode\n   that counts the number of pending direct I/O requests.  Truncate can\u0027t\n   proceed as long as it\u0027s non-zero\n - when i_dio_count reaches non-zero we wake up a pending truncate using\n   wake_up_bit on a new bit in i_flags\n - new references to i_dio_count can\u0027t appear while we are waiting for\n   it to read zero because the direct I/O count always needs i_mutex\n   (or an equivalent like XFS\u0027s i_iolock) for starting a new operation.\n\nThis scheme is much simpler, and saves the space of a spinlock_t and a\nstruct list_head in struct inode (typically 160 bits on a non-debug 64-bit\nsystem).\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "0e1fdafd93980eac62e778798549ce0f6073905c",
      "tree": "a8b21525d195d436fa738e9a470e64eaa21e6736",
      "parents": [
        "4f8c19fdf3f97402b68f058b1c72a6c7166c9e59"
      ],
      "author": {
        "name": "Dave Chinner",
        "email": "dchinner@redhat.com",
        "time": "Fri Jul 08 14:14:44 2011 +1000"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 20:47:41 2011 -0400"
      },
      "message": "superblock: add filesystem shrinker operations\n\nNow we have a per-superblock shrinker implementation, we can add a\nfilesystem specific callout to it to allow filesystem internal\ncaches to be shrunk by the superblock shrinker.\n\nRather than perpetuate the multipurpose shrinker callback API (i.e.\nnr_to_scan \u003d\u003d 0 meaning \"tell me how many objects freeable in the\ncache), two operations will be added. The first will return the\nnumber of objects that are freeable, the second is the actual\nshrinker call.\n\nSigned-off-by: Dave Chinner \u003cdchinner@redhat.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "b0d40c92adafde7c2d81203ce7c1c69275f41140",
      "tree": "f75a19dcd1a37aff23dc43323b58f014b1297c6b",
      "parents": [
        "12ad3ab66103e6582ca69c0c9de18b13487eaaef"
      ],
      "author": {
        "name": "Dave Chinner",
        "email": "dchinner@redhat.com",
        "time": "Fri Jul 08 14:14:42 2011 +1000"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 20:47:10 2011 -0400"
      },
      "message": "superblock: introduce per-sb cache shrinker infrastructure\n\nWith context based shrinkers, we can implement a per-superblock\nshrinker that shrinks the caches attached to the superblock. We\ncurrently have global shrinkers for the inode and dentry caches that\nsplit up into per-superblock operations via a coarse proportioning\nmethod that does not batch very well.  The global shrinkers also\nhave a dependency - dentries pin inodes - so we have to be very\ncareful about how we register the global shrinkers so that the\nimplicit call order is always correct.\n\nWith a per-sb shrinker callout, we can encode this dependency\ndirectly into the per-sb shrinker, hence avoiding the need for\nstrictly ordering shrinker registrations. We also have no need for\nany proportioning code for the shrinker subsystem already provides\nthis functionality across all shrinkers. Allowing the shrinker to\noperate on a single superblock at a time means that we do less\nsuperblock list traversals and locking and reclaim should batch more\neffectively. This should result in less CPU overhead for reclaim and\npotentially faster reclaim of items from each filesystem.\n\nSigned-off-by: Dave Chinner \u003cdchinner@redhat.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "8fb47a4fbf858a164e973b8ea8ef5e83e61f2e50",
      "tree": "d3b55fbce0e7ba5708a55b91b1ab4079ad192db6",
      "parents": [
        "c46556c6be057da79f51b1a8325ec4c27938bd49"
      ],
      "author": {
        "name": "J. Bruce Fields",
        "email": "bfields@redhat.com",
        "time": "Wed Jul 20 20:21:59 2011 -0400"
      },
      "committer": {
        "name": "J. Bruce Fields",
        "email": "bfields@redhat.com",
        "time": "Wed Jul 20 20:23:19 2011 -0400"
      },
      "message": "locks: rename lock-manager ops\n\nBoth the filesystem and the lock manager can associate operations with a\nlock.  Confusingly, one of them (fl_release_private) actually has the\nsame name in both operation structures.\n\nIt would save some confusion to give the lock-manager ops different\nnames.\n\nSigned-off-by: J. Bruce Fields \u003cbfields@redhat.com\u003e\n"
    },
    {
      "commit": "09cc9fc7a7c3d872065426d7fb0f0ad6d3eb90fc",
      "tree": "79f6f835dd009ac34bd35ee3ee61e616ec2b255a",
      "parents": [
        "98b745c647a5a90c3c21ea43cbfad9a47b0dfad7"
      ],
      "author": {
        "name": "Dave Chinner",
        "email": "dchinner@redhat.com",
        "time": "Fri Jul 08 14:14:40 2011 +1000"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 01:44:36 2011 -0400"
      },
      "message": "inode: move to per-sb LRU locks\n\nWith the inode LRUs moving to per-sb structures, there is no longer\na need for a global inode_lru_lock. The locking can be made more\nfine-grained by moving to a per-sb LRU lock, isolating the LRU\noperations of different filesytsems completely from each other.\n\nSigned-off-by: Dave Chinner \u003cdchinner@redhat.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "98b745c647a5a90c3c21ea43cbfad9a47b0dfad7",
      "tree": "08917a620b6d15076223c1ef75996a1a76a13abd",
      "parents": [
        "fcb94f72d3e0f4f34b326c2986da8e5996daf72c"
      ],
      "author": {
        "name": "Dave Chinner",
        "email": "dchinner@redhat.com",
        "time": "Fri Jul 08 14:14:39 2011 +1000"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 01:44:35 2011 -0400"
      },
      "message": "inode: Make unused inode LRU per superblock\n\nThe inode unused list is currently a global LRU. This does not match\nthe other global filesystem cache - the dentry cache - which uses\nper-superblock LRU lists. Hence we have related filesystem object\ntypes using different LRU reclaimation schemes.\n\nTo enable a per-superblock filesystem cache shrinker, both of these\ncaches need to have per-sb unused object LRU lists. Hence this patch\nconverts the global inode LRU to per-sb LRUs.\n\nThe patch only does rudimentary per-sb propotioning in the shrinker\ninfrastructure, as this gets removed when the per-sb shrinker\ncallouts are introduced later on.\n\nSigned-off-by: Dave Chinner \u003cdchinner@redhat.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "0ee5dc676a5f8fadede608c7281dfedb1ae714ea",
      "tree": "887896f0e1b51f39e9be21a1e8d960ec50a817a7",
      "parents": [
        "fb408e6ccc32404a05783911b6f3fed56bd17b06"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Thu Jul 07 15:44:25 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 01:44:20 2011 -0400"
      },
      "message": "btrfs: kill magical embedded struct superblock\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "729cdb3a1ee03a4363f9c7e66ddd979727e99e1f",
      "tree": "6b2e6947e1f58ebcb1aaa2a0f0710ae1fb2d6a1d",
      "parents": [
        "76fe3276be26cff2e609cdcfbc1265cf1dd72b2c"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jun 21 01:01:22 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 01:43:36 2011 -0400"
      },
      "message": "kill IPERM_FLAG_RCU\n\nnot used anymore\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "10556cb21a0d0b24d95f00ea6df16f599a3345b2",
      "tree": "3d7d8dfba807805a55c154f1850717bf3b49f343",
      "parents": [
        "2830ba7f34ebb27c4e5b8b6ef408cd6d74860890"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Jun 20 19:28:19 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 01:43:24 2011 -0400"
      },
      "message": "-\u003epermission() sanitizing: don\u0027t pass flags to -\u003epermission()\n\nnot used by the instances anymore.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "2830ba7f34ebb27c4e5b8b6ef408cd6d74860890",
      "tree": "bbcebc14bffd000f1dfcbf37e64f56d2f49581ac",
      "parents": [
        "7e40145eb111a5192e6d819f764db9d6828d1abb"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Jun 20 19:16:29 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 01:43:22 2011 -0400"
      },
      "message": "-\u003epermission() sanitizing: don\u0027t pass flags to generic_permission()\n\nredundant; all callers get it duplicated in mask \u0026 MAY_NOT_BLOCK and none of\nthem removes that bit.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "7e40145eb111a5192e6d819f764db9d6828d1abb",
      "tree": "3249952a751de12465e8d66c63328445e9242f3a",
      "parents": [
        "9c2c703929e4c41210cfa6e3f599514421bab8dc"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Jun 20 19:12:17 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 01:43:21 2011 -0400"
      },
      "message": "-\u003epermission() sanitizing: don\u0027t pass flags to -\u003echeck_acl()\n\nnot used in the instances anymore.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "1fc0f78ca9f311c6277e2f1b7655bb4d43ceb311",
      "tree": "9c6a5879558b7a189f94eae97ac80268e63fe29b",
      "parents": [
        "178ea73521d64ba41d7aa5488fb9f549c6d4507d"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Jun 20 18:59:02 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 01:43:18 2011 -0400"
      },
      "message": "-\u003epermission() sanitizing: MAY_NOT_BLOCK\n\nDuplicate the flags argument into mask bitmap.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "178ea73521d64ba41d7aa5488fb9f549c6d4507d",
      "tree": "7fb6bfb6483577752e307a5bb2e3905658d44294",
      "parents": [
        "07b8ce1ee87d291ff564c02cf878fae973317a52"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Jun 20 11:31:30 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 01:43:16 2011 -0400"
      },
      "message": "kill check_acl callback of generic_permission()\n\nits value depends only on inode and does not change; we might as\nwell store it in -\u003ei_op-\u003echeck_acl and be done with that.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "07b8ce1ee87d291ff564c02cf878fae973317a52",
      "tree": "94f07ed2b5d18aef71f1b28193375f88c0c947bc",
      "parents": [
        "f4d6ff89d8e54b68a4322388d26d518d6133fa4e"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Jun 20 10:52:57 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 01:43:14 2011 -0400"
      },
      "message": "lockless get_write_access/deny_write_access\n\nnew helpers: atomic_inc_unless_negative()/atomic_dec_unless_positive()\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "3bfa784a6539f91a27d7ffdd408efdb638e3bebd",
      "tree": "2fb293076c98a4bbc18fd2ddad7fdc4cea08c384",
      "parents": [
        "1b5d783c94c328d406e801566f161adcfb018dda"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Sun Jun 19 12:55:10 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 01:43:11 2011 -0400"
      },
      "message": "kill file_permission() completely\n\nconvert the last remaining caller to inode_permission()\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "43e15cdbefea4ce6d68113de98d4f61c0cf45687",
      "tree": "75676aae179fc56bbb9d861c0ab656a9edaa7ca4",
      "parents": [
        "44396f4b5cb8566f7118aec55eeac99be7ad94cb"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Fri Jun 03 20:16:57 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 01:43:04 2011 -0400"
      },
      "message": "new helper: iterate_supers_type()\n\nCall the given function for all superblocks of given type.  Function\ngets a superblock (with s_umount locked shared) and (void *) argument\nsupplied by caller of iterator.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "4aede84b33d6beb401136a3deca0651ae07c5e99",
      "tree": "831266dbb15227584da5011ae4bb1e5038a69677",
      "parents": [
        "a07405b7802691d29ab3b23bdc76ee6d006aad0b"
      ],
      "author": {
        "name": "Justin TerAvest",
        "email": "teravest@google.com",
        "time": "Tue Jul 12 08:31:45 2011 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jaxboe@fusionio.com",
        "time": "Tue Jul 12 08:35:10 2011 +0200"
      },
      "message": "fixlet: Remove fs_excl from struct task.\n\nfs_excl is a poor man\u0027s priority inheritance for filesystems to hint to\nthe block layer that an operation is important. It was never clearly\nspecified, not widely adopted, and will not prevent starvation in many\ncases (like across cgroups).\n\nfs_excl was introduced with the time sliced CFQ IO scheduler, to\nindicate when a process held FS exclusive resources and thus needed\na boost.\n\nIt doesn\u0027t cover all file systems, and it was never fully complete.\nLets kill it.\n\nSigned-off-by: Justin TerAvest \u003cteravest@google.com\u003e\nSigned-off-by: Jens Axboe \u003cjaxboe@fusionio.com\u003e\n"
    }
  ],
  "next": "b7e9c223be8ce335e30f2cf6ba588e6a4092275c"
}