)]}'
{
  "log": [
    {
      "commit": "6d3b82f2d31f22085e5711b28dddcb9fb3d97a25",
      "tree": "50a3325a3ff81e3583e8a3c6203b8945afc06ff3",
      "parents": [
        "3ebfdf885acedafcadceb4007e77438479094135"
      ],
      "author": {
        "name": "Fang Wenqi",
        "email": "anton.fang@gmail.com",
        "time": "Thu Dec 24 17:51:42 2009 -0500"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Thu Dec 24 17:51:42 2009 -0500"
      },
      "message": "ext4: Update documentation to correct the inode_readahead_blks option name\n\nPer commit 240799cd, the option name for readahead should be\ninode_readahead_blks, not inode_readahead.\n\nSigned-off-by: Fang Wenqi \u003cantonf@turbolinux.com.cn\u003e\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "e3bb52ae2bb9573e84c17b8e3560378d13a5c798",
      "tree": "529bbe0318f5bd6a2c76fb855c54b08bc85fd9e0",
      "parents": [
        "5328e635315734d42080de9a5a1ee87bf4cae0a4"
      ],
      "author": {
        "name": "Eric Sandeen",
        "email": "sandeen@redhat.com",
        "time": "Thu Nov 19 14:28:50 2009 -0500"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Thu Nov 19 14:28:50 2009 -0500"
      },
      "message": "ext4: make \"norecovery\" an alias for \"noload\"\n\nUsers on the linux-ext4 list recently complained about differences\nacross filesystems w.r.t. how to mount without a journal replay.\n\nIn the discussion it was noted that xfs\u0027s \"norecovery\" option is\nperhaps more descriptively accurate than \"noload,\" so let\u0027s make\nthat an alias for ext4.\n\nAlso show this status in /proc/mounts\n\nSigned-off-by: Eric Sandeen \u003csandeen@redhat.com\u003e\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "5328e635315734d42080de9a5a1ee87bf4cae0a4",
      "tree": "4952c04c9b1faec9a3c82a3743805efad05ed96e",
      "parents": [
        "2bba702d4f88d7b010ec37e2527b552588404ae7"
      ],
      "author": {
        "name": "Eric Sandeen",
        "email": "sandeen@redhat.com",
        "time": "Thu Nov 19 14:25:42 2009 -0500"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Thu Nov 19 14:25:42 2009 -0500"
      },
      "message": "ext4: make trim/discard optional (and off by default)\n\nIt is anticipated that when sb_issue_discard starts doing\nreal work on trim-capable devices, we may see issues.  Make\nthis mount-time optional, and default it to off until we know\nthat things are working out OK.\n\nSigned-off-by: Eric Sandeen \u003csandeen@redhat.com\u003e\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "d4da6c9ccf648f3f1cb5bf9d981a62c253d30e28",
      "tree": "709f8bdc50a3a1d47632047eb3670b4a4a6ff045",
      "parents": [
        "c35102c3e15f90fe604523a2fbffd9dc158b455a"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Nov 02 10:15:27 2009 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Mon Nov 02 10:15:27 2009 -0800"
      },
      "message": "Revert \"ext4: Remove journal_checksum mount option and enable it by default\"\n\nThis reverts commit d0646f7b636d067d715fab52a2ba9c6f0f46b0d7, as\nrequested by Eric Sandeen.\n\nIt can basically cause an ext4 filesystem to miss recovery (and thus get\nmounted with errors) if the journal checksum does not match.\n\nQuoth Eric:\n\n   \"My hand-wavy hunch about what is happening is that we\u0027re finding a\n    bad checksum on the last partially-written transaction, which is\n    not surprising, but if we have a wrapped log and we\u0027re doing the\n    initial scan for head/tail, and we abort scanning on that bad\n    checksum, then we are essentially running an unrecovered filesystem.\n\n    But that\u0027s hand-wavy and I need to go look at the code.\n\n    We lived without journal checksums on by default until now, and at\n    this point they\u0027re doing more harm than good, so we should revert\n    the default-changing commit until we can fix it and do some good\n    power-fail testing with the fixes in place.\"\n\nSee\n\n\thttp://bugzilla.kernel.org/show_bug.cgi?id\u003d14354\n\nfor all the gory details.\n\nRequested-by: Eric Sandeen \u003csandeen@redhat.com\u003e\nCc: Theodore Tso \u003ctytso@mit.edu\u003e\nCc: Alexey Fisher \u003cbug-track@fisher-privat.net\u003e\nCc: Maxim Levitsky \u003cmaximlevitsky@gmail.com\u003e\nCc: Aneesh Kumar K.V \u003caneesh.kumar@linux.vnet.ibm.com\u003e\nCc: Mathias Burén \u003cmathias.buren@gmail.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "8365388827663bd6fb773e3623ed9023c0f82b1d",
      "tree": "e8f0166c3c17501c33375f9b1b70e702f7bbd65d",
      "parents": [
        "6d7f18f6ea3a13af95bdf507fc54d42b165e1712"
      ],
      "author": {
        "name": "Jan Kara",
        "email": "jack@suse.cz",
        "time": "Tue Sep 29 15:59:34 2009 -0400"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Tue Sep 29 15:59:34 2009 -0400"
      },
      "message": "ext4: Update documentation about quota mount options\n\nSigned-off-by: Jan Kara \u003cjack@suse.cz\u003e\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "1358870deaf11a752a84fbd89201749aa62498e8",
      "tree": "7d17f77086d862ade1c12bd7defd8ea24d73040b",
      "parents": [
        "0a80e9867db154966b2a771042e10452ac110e1e"
      ],
      "author": {
        "name": "Jan Kara",
        "email": "jack@suse.cz",
        "time": "Fri Sep 18 12:22:29 2009 -0400"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Fri Sep 18 12:22:29 2009 -0400"
      },
      "message": "ext4: Update documentation about quota mount options\n\nSigned-off-by: Jan Kara \u003cjack@suse.cz\u003e\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "d0646f7b636d067d715fab52a2ba9c6f0f46b0d7",
      "tree": "f7b3ae9510e8c789651d99fee0c22867e6ccba94",
      "parents": [
        "a3710fd1ee8cd542c5de63cf2c39f8912031f867"
      ],
      "author": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Sat Sep 05 12:50:43 2009 -0400"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Sat Sep 05 12:50:43 2009 -0400"
      },
      "message": "ext4: Remove journal_checksum mount option and enable it by default\n\nThere\u0027s no real cost for the journal checksum feature, and we should\nmake sure it is enabled all the time.\n\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n\n\n"
    },
    {
      "commit": "8a8a2050c844d9de224ff591e91bda3f77bd6eda",
      "tree": "39aa31e7061526c197f62cae2f80bbd888fad070",
      "parents": [
        "4ab2f15b7f709c3626a7eed075a7225b4c775c7e"
      ],
      "author": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Sat Jun 13 10:08:59 2009 -0400"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Sat Jun 13 10:08:59 2009 -0400"
      },
      "message": "ext4: document the \"abort\" mount option\n\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "19f594600110377ec4037fdf7fb93a25ec516212",
      "tree": "bf88707b65f0138b754d896300976e474098a50d",
      "parents": [
        "19af5cdb7c79ff5ec96a99893ffb7f894f4a3dc1"
      ],
      "author": {
        "name": "Matt LaPlante",
        "email": "kernel1@cyberdogtech.com",
        "time": "Mon Apr 27 15:06:31 2009 +0200"
      },
      "committer": {
        "name": "Jiri Kosina",
        "email": "jkosina@suse.cz",
        "time": "Fri Jun 12 18:01:47 2009 +0200"
      },
      "message": "trivial: Miscellaneous documentation typo fixes\n\nFix various typos in documentation txts.\n\nSigned-off-by: Matt LaPlante \u003ckernel1@cyberdogtech.com\u003e\nSigned-off-by: Jiri Kosina \u003cjkosina@suse.cz\u003e\n"
    },
    {
      "commit": "06705bff9114531a997a7d0c2520bea0f2927410",
      "tree": "f7bef499cd491c8171db45da5b02c168655d4236",
      "parents": [
        "e7c9e3e99adf6c49c5d593a51375916acc039d1e"
      ],
      "author": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Sat Mar 28 10:59:57 2009 -0400"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Sat Mar 28 10:59:57 2009 -0400"
      },
      "message": "ext4: Regularize mount options\n\nAdd support for using the mount options \"barrier\" and \"nobarrier\", and\n\"auto_da_alloc\" and \"noauto_da_alloc\", which is more consistent than\n\"barrier\u003d\u003c0|1\u003e\" or \"auto_da_alloc\u003d\u003c0|1\u003e\".  Most other ext3/ext4 mount\noptions use the foo/nofoo naming convention.  We allow the old forms\nof these mount options for backwards compatibility.\n\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "722bde6875bfb49a0c84e5601eb82dd7ac02d27c",
      "tree": "03c51a876ba9f4f3e0a796f30b0bd86f632de45d",
      "parents": [
        "7a262f7c69163cd4811f2f838faef5c5b18439c9"
      ],
      "author": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Mon Feb 23 00:51:57 2009 -0500"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Mon Feb 23 00:51:57 2009 -0500"
      },
      "message": "ext4: Add fine print for the 32000 subdirectory limit\n\nSome poeple are reading the ext4 feature list too literally and create\ndubious test cases involving very long filenames and 1k blocksize and\nthen complain when they run into an htree-imposed limit.  So add fine\nprint to the \"fix 32000 subdirectory limit\" ext4 feature.\n\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "83982b6f47201c4c7767210d24d7d8c99567a0b3",
      "tree": "f1c19b1c6b5a34dd0c5de7519b78414b7a9267ee",
      "parents": [
        "4d783b093cd4f3e2738527365979cbd1c5101065"
      ],
      "author": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Tue Jan 06 14:53:16 2009 -0500"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Tue Jan 06 14:53:16 2009 -0500"
      },
      "message": "ext4: Remove \"extents\" mount option\n\nThis mount option is largely superfluous, and in fact the way it was\nimplemented was buggy; if a filesystem which did not have the extents\nfeature flag was mounted -o extents, the filesystem would attempt to\ncreate and use extents-based file even though the extents feature flag\nwas not eabled.  The simplest thing to do is to nuke the mount option\nentirely.  It\u0027s not all that useful to force the non-creation of new\nextent-based files if the filesystem can support it.\n\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "b3881f74b31b7d47d0f1c4d89ac3e7f0b9c05e3e",
      "tree": "131190b7ec627fd2ef2ecc818a7b9c17b83ccd63",
      "parents": [
        "40a1984d22294ab202f616e432bb8d3481897675"
      ],
      "author": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Mon Jan 05 22:46:26 2009 -0500"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Mon Jan 05 22:46:26 2009 -0500"
      },
      "message": "ext4: Add mount option to set kjournald\u0027s I/O priority\n\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\nCc: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "c31910672376dfb8d020e32afa7249763bcd924a",
      "tree": "3f2b95a1d4a4da76d85d5bf32534fa3d15a82eac",
      "parents": [
        "c39a7f84d7845aa95d1c7c168f38215aedcc13c2"
      ],
      "author": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Tue Jan 06 11:14:25 2009 -0500"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Tue Jan 06 11:14:25 2009 -0500"
      },
      "message": "ext4: Remove code to create the journal inode\n\nThis code has been obsolete in quite some time, since the supported\nmethod for adding a journal inode is to use tune2fs (or to creating\nnew filesystem with a journal via mke2fs or mkfs.ext4).\n\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "30773840c19cea60dcef39545960d541b1ac1cf8",
      "tree": "f220a2dce451a40dc7264e8fd70c77c5a3908873",
      "parents": [
        "d7cfa4684d82f58e5d7cb73b8a3c88c169937f25"
      ],
      "author": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Sat Jan 03 20:27:38 2009 -0500"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Sat Jan 03 20:27:38 2009 -0500"
      },
      "message": "ext4: add fsync batch tuning knobs\n\nAdd new mount options, min_batch_time and max_batch_time, which\ncontrols how long the jbd2 layer should wait for additional filesystem\noperations to get batched with a synchronous write transaction.\n\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "8e1a4857cd92e32e642b3e7184c7f6bf85c96e2e",
      "tree": "2d82db0e86e080bd1673572b77ae6da2cc870067",
      "parents": [
        "59e315b4c410b00a9acd0f24a00dbadbe81ce692"
      ],
      "author": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Tue Jan 06 14:53:06 2009 -0500"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Tue Jan 06 14:53:06 2009 -0500"
      },
      "message": "Update Documentation/filesystems/ext4.txt\n\nFix paragraph with recommendations on how to tune ext4 for benchmarks.\n\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "22359f5745eb26bd3205a1ede7968c8944398220",
      "tree": "89bd181323f2f5851cc6233f778dd8fe48b1a2a6",
      "parents": [
        "01436ef2e4710317f826c4893b31c07b2d8df88c"
      ],
      "author": {
        "name": "Diego Calleja",
        "email": "diegocg@gmail.com",
        "time": "Fri Oct 17 09:15:14 2008 -0400"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Fri Oct 17 09:15:14 2008 -0400"
      },
      "message": "ext4: Update Documentation/filesystems/ext4.txt\n\nSince Ext4 is supposed to be stable in 2.6.28-rc, ext4\u0027s documentation\nfile should be updated.\n\n[ More updates also added by Theodore Ts\u0027o. ]\n\nSigned-off-by: Diego Calleja \u003cdiegocg@gmail.com\u003e\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "5bf5683a33f3584da6eced480967c4f7e11515a8",
      "tree": "4986ba3932d9f259fa1bc674deff3e35f689b243",
      "parents": [
        "7ad7445f60fe4d46c4c9d2a9463db180d2a3b270"
      ],
      "author": {
        "name": "Hidehiro Kawai",
        "email": "hidehiro.kawai.ez@hitachi.com",
        "time": "Fri Oct 10 22:12:43 2008 -0400"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Fri Oct 10 22:12:43 2008 -0400"
      },
      "message": "ext4: add an option to control error handling on file data\n\nIf the journal doesn\u0027t abort when it gets an IO error in file data\nblocks, the file data corruption will spread silently.  Because\nmost of applications and commands do buffered writes without fsync(),\nthey don\u0027t notice the IO error.  It\u0027s scary for mission critical\nsystems.  On the other hand, if the journal aborts whenever it gets\nan IO error in file data blocks, the system will easily become\ninoperable.  So this patch introduces a filesystem option to\ndetermine whether it aborts the journal or just call printk() when\nit gets an IO error in file data.\n\nIf you mount an ext4 fs with data_err\u003dabort option, it aborts on file\ndata write error.  If you mount it with data_err\u003dignore, it doesn\u0027t\nabort, just call printk().  data_err\u003dignore is the default.\n\nHere is the corresponding patch of the ext3 version:\nhttp://kerneltrap.org/mailarchive/linux-kernel/2008/9/9/3239374\n\nSigned-off-by: Hidehiro Kawai \u003chidehiro.kawai.ez@hitachi.com\u003e\nSigned-off-by: Theodore Ts\u0027o \u003ctytso@mit.edu\u003e\n\n"
    },
    {
      "commit": "03010a3350301baac2154fa66de925ae2981b7e3",
      "tree": "b1af2cecbb540faab4bd67dc1a28ad3384341d72",
      "parents": [
        "39d80c33a068d9fa63a36c3b2c0d718d38440dd1"
      ],
      "author": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Fri Oct 10 20:02:48 2008 -0400"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Fri Oct 10 20:02:48 2008 -0400"
      },
      "message": "ext4: Rename ext4dev to ext4\n\nThe ext4 filesystem is getting stable enough that it\u0027s time to drop\nthe \"dev\" prefix.  Also remove the requirement for the TEST_FILESYS\nflag.\n\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "240799cdf22bd789ea6852653c3b879d35ad0a6c",
      "tree": "e696b60cc103f23838b5c14d8d397f692abffbc3",
      "parents": [
        "37515facd001942221d68171c81c1f46d54ffdd0"
      ],
      "author": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Thu Oct 09 23:53:47 2008 -0400"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Thu Oct 09 23:53:47 2008 -0400"
      },
      "message": "ext4: Use readahead when reading an inode from the inode table\n\nWith modern hard drives, reading 64k takes roughly the same time as\nreading a 4k block.  So request readahead for adjacent inode table\nblocks to reduce the time it takes when iterating over directories\n(especially when doing this in htree sort order) in a cold cache case.\nWith this patch, the time it takes to run \"git status\" on a kernel\ntree after flushing the caches via \"echo 3 \u003e /proc/sys/vm/drop_caches\"\nis reduced by 21%.\n\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "4537398d91e6e03811ba971d959b762137058c1a",
      "tree": "650408a7954dd8147ab2f4ab3f1170ab401f9a61",
      "parents": [
        "5e745b041f2ccad63077118b40468521306f3962"
      ],
      "author": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Sun Jul 27 19:59:21 2008 -0400"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Sun Jul 27 19:59:21 2008 -0400"
      },
      "message": "ext4: Update documentation to remind users to update mke2fs.conf\n\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n\n"
    },
    {
      "commit": "49f1487b2e41bd8439ea39a4f15b4064e823cc54",
      "tree": "03f6b923b8d1a2134b7049b199cce0244ce66fcf",
      "parents": [
        "e4079a11f5ed966b7d972cc69e8d337a0f095e32"
      ],
      "author": {
        "name": "Mingming Cao",
        "email": "cmm@us.ibm.com",
        "time": "Fri Jul 11 19:27:31 2008 -0400"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Fri Jul 11 19:27:31 2008 -0400"
      },
      "message": "ext4: Documention update for new ordered mode and delayed allocation\n\nAdding some documentations for delayed allocation and new ordered mode.\n\nSigned-off-by: Mingming Cao \u003ccmm@us.ibm.com\u003e\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "93e3270c87549dc531a0b0e5d06362d998d810cb",
      "tree": "2eed9efa6734780d3adbe85dd12c4a470d93072a",
      "parents": [
        "5f21b0e642d7bf6fe4434c9ba12bc9cb96b17cf7"
      ],
      "author": {
        "name": "Jose R. Santos",
        "email": "jrs@us.ibm.com",
        "time": "Fri Jul 11 19:27:31 2008 -0400"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Fri Jul 11 19:27:31 2008 -0400"
      },
      "message": "ext4: Documentation updates.\n\nSome of the information in Documentation/filesystems/ext4.txt is out\nof date and in need of an update.\n\nSigned-off-by: Jose R. Santos \u003cjrs@us.ibm.com\u003e\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "571640cad3fda6475da45d91cf86076f1f86bd9b",
      "tree": "a97ff3da9b60251c68358cd000c217cb37915ea2",
      "parents": [
        "034772b068be62a79470d6c1b81b01fbe27793ac"
      ],
      "author": {
        "name": "Eric Sandeen",
        "email": "sandeen@redhat.com",
        "time": "Mon May 26 12:29:46 2008 -0400"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Mon May 26 12:29:46 2008 -0400"
      },
      "message": "ext4: enable barriers by default\n\nI can\u0027t think of any valid reason for ext4 to not use barriers when\nthey are available;  I believe this is necessary for filesystem\nintegrity in the face of a volatile write cache on storage.\n\nAn administrator who trusts that the cache is sufficiently battery-\nbacked (and power supplies are sufficiently redundant, etc...)\ncan always turn it back off again.\n\nSuSE has carried such a patch for ext3 for quite some time now.\n\nAlso document the mount option while we\u0027re at it.\n\nSigned-off-by: Eric Sandeen \u003csandeen@redhat.com\u003e\nSigned-off-by: Mingming Cao \u003ccmm@us.ibm.com\u003e\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "c9de560ded61faa5b754137b7753da252391c55a",
      "tree": "2c4311377c4aa72450e27f531e198fe3e1c67db0",
      "parents": [
        "1988b51e476bd097d910c9245b53f2e38aedaf0d"
      ],
      "author": {
        "name": "Alex Tomas",
        "email": "alex@clusterfs.com",
        "time": "Tue Jan 29 00:19:52 2008 -0500"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Tue Jan 29 00:19:52 2008 -0500"
      },
      "message": "ext4: Add multi block allocator for ext4\n\nSigned-off-by: Alex Tomas \u003calex@clusterfs.com\u003e\nSigned-off-by: Andreas Dilger \u003cadilger@clusterfs.com\u003e\nSigned-off-by: Aneesh Kumar K.V \u003caneesh.kumar@linux.vnet.ibm.com\u003e\nSigned-off-by: Eric Sandeen \u003csandeen@redhat.com\u003e\nSigned-off-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\n"
    },
    {
      "commit": "818d276ceb83aa9fdebb5e0a53188290312de987",
      "tree": "de3fb4ffadd72caea2876c5232ce76cd14b3646e",
      "parents": [
        "8e85fb3f305b24b79c6d9cb7a56d22b062335ad3"
      ],
      "author": {
        "name": "Girish Shilamkar",
        "email": "girish@clusterfs.com",
        "time": "Mon Jan 28 23:58:27 2008 -0500"
      },
      "committer": {
        "name": "Theodore Ts\u0027o",
        "email": "tytso@mit.edu",
        "time": "Mon Jan 28 23:58:27 2008 -0500"
      },
      "message": "ext4: Add the journal checksum feature\n\nThe journal checksum feature adds two new flags i.e\nJBD2_FEATURE_INCOMPAT_ASYNC_COMMIT and JBD2_FEATURE_COMPAT_CHECKSUM.\n\nJBD2_FEATURE_CHECKSUM flag indicates that the commit block contains the\nchecksum for the blocks described by the descriptor blocks.\nDue to checksums, writing of the commit record no longer needs to be\nsynchronous. Now commit record can be sent to disk without waiting for\ndescriptor blocks to be written to disk. This behavior is controlled\nusing JBD2_FEATURE_ASYNC_COMMIT flag. Older kernels/e2fsck should not be\nable to recover the journal with _ASYNC_COMMIT hence it is made\nincompat.\nThe commit header has been extended to hold the checksum along with the\ntype of the checksum.\n\nFor recovery in pass scan checksums are verified to ensure the sanity\nand completeness(in case of _ASYNC_COMMIT) of every transaction.\n\nSigned-off-by: Andreas Dilger \u003cadilger@clusterfs.com\u003e\nSigned-off-by: Girish Shilamkar \u003cgirish@clusterfs.com\u003e\nSigned-off-by: Dave Kleikamp \u003cshaggy@linux.vnet.ibm.com\u003e\nSigned-off-by: Mingming Cao \u003ccmm@us.ibm.com\u003e\n"
    },
    {
      "commit": "fc513a333b45f8913d40c8241a0cb61be79e1c60",
      "tree": "1abd23dd907da0ca29ff0511aeda238efbaa8662",
      "parents": [
        "63f5793351d821749979e36889f9c089c6028c83"
      ],
      "author": {
        "name": "Dave Kleikamp",
        "email": "shaggy@austin.ibm.com",
        "time": "Wed Oct 11 01:21:25 2006 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@g5.osdl.org",
        "time": "Wed Oct 11 11:14:19 2006 -0700"
      },
      "message": "[PATCH] Documentation/filesystems/ext4.txt\n\nThis file, ext4.txt, was put together with information from Andrew Morton,\nAndreas Dilger, Suparna Bhattacharya, and Ted Ts\u0027o.\n\nI copied the mount options, with the exception of \"extents\", from ext3.txt,\nso if anyone is aware of anything out-of-date, please let me know.\n\nSigned-off-by: Dave Kleikamp \u003cshaggy@austin.ibm.com\u003e\nCc: Theodore Ts\u0027o \u003ctytso@mit.edu\u003e\nCc: Suparna Bhattacharya \u003csuparna@in.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n"
    }
  ]
}