)]}'
{
  "log": [
    {
      "commit": "143bede527b054a271053f41bfaca2b57baa9408",
      "tree": "95c71d3705c73bf98e7a1547da35e70a44703c1e",
      "parents": [
        "ffd7b33944f4573a063af7a55f8a5199c8185665"
      ],
      "author": {
        "name": "Jeff Mahoney",
        "email": "jeffm@suse.com",
        "time": "Thu Mar 01 14:56:26 2012 +0100"
      },
      "committer": {
        "name": "David Sterba",
        "email": "dsterba@suse.cz",
        "time": "Thu Mar 22 01:45:34 2012 +0100"
      },
      "message": "btrfs: return void in functions without error conditions\n\nSigned-off-by: Jeff Mahoney \u003cjeffm@suse.com\u003e\n"
    },
    {
      "commit": "621496f4fd56195b7b273521f467c2945165481f",
      "tree": "c4ae099610e1c43eafd48931aa9d8cac776f8fdb",
      "parents": [
        "8cc33e5c19bf01c7617608669be8c1b4f663eb2f"
      ],
      "author": {
        "name": "David Sterba",
        "email": "dsterba@suse.cz",
        "time": "Wed May 04 12:56:49 2011 +0200"
      },
      "committer": {
        "name": "David Sterba",
        "email": "dsterba@suse.cz",
        "time": "Wed May 04 14:01:26 2011 +0200"
      },
      "message": "btrfs: remove unused function prototypes\n\nfunction prototypes without a body\n\nSigned-off-by: David Sterba \u003cdsterba@suse.cz\u003e\n"
    },
    {
      "commit": "4a500fd178c89b96fa166a2d9e7855df33429841",
      "tree": "b97fe0b0c1cb19388fcf28f77cd74a645ec69a61",
      "parents": [
        "d68fc57b7e3245cfacf2e3b47acfed1946a11786"
      ],
      "author": {
        "name": "Yan, Zheng",
        "email": "zheng.yan@oracle.com",
        "time": "Sun May 16 10:49:59 2010 -0400"
      },
      "committer": {
        "name": "Chris Mason",
        "email": "chris.mason@oracle.com",
        "time": "Tue May 25 10:34:53 2010 -0400"
      },
      "message": "Btrfs: Metadata ENOSPC handling for tree log\n\nPrevious patches make the allocater return -ENOSPC if there is no\nunreserved free metadata space. This patch updates tree log code\nand various other places to propagate/handle the ENOSPC error.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n"
    },
    {
      "commit": "257c62e1bce03e5b9f3f069fd52ad73a56de71fd",
      "tree": "ad047fe5796156aa88e3f3600111bf2b8d12759f",
      "parents": [
        "4722607db6a78bd7748c51fa4c8d7371da797254"
      ],
      "author": {
        "name": "Chris Mason",
        "email": "chris.mason@oracle.com",
        "time": "Tue Oct 13 13:21:08 2009 -0400"
      },
      "committer": {
        "name": "Chris Mason",
        "email": "chris.mason@oracle.com",
        "time": "Tue Oct 13 13:35:12 2009 -0400"
      },
      "message": "Btrfs: avoid tree log commit when there are no changes\n\nrpm has a habit of running fdatasync when the file hasn\u0027t\nchanged.  We already detect if a file hasn\u0027t been changed\nin the current transaction but it might have been sent to\nthe tree-log in this transaction and not changed since\nthe last call to fsync.\n\nIn this case, we want to avoid a tree log sync, which includes\na number of synchronous writes and barriers.  This commit\nextends the existing tracking of the last transaction to change\na file to also track the last sub-transaction.\n\nThe end result is that rpm -ivh and -Uvh are roughly twice as fast,\nand on par with ext3.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n"
    },
    {
      "commit": "12fcfd22fe5bf4fe74710232098bc101af497995",
      "tree": "b01ba82147ea76c89149e54d475ed97121387261",
      "parents": [
        "a74ac3220774d33db967088906dc3351829e2d3a"
      ],
      "author": {
        "name": "Chris Mason",
        "email": "chris.mason@oracle.com",
        "time": "Tue Mar 24 10:24:20 2009 -0400"
      },
      "committer": {
        "name": "Chris Mason",
        "email": "chris.mason@oracle.com",
        "time": "Tue Mar 24 16:14:52 2009 -0400"
      },
      "message": "Btrfs: tree logging unlink/rename fixes\n\nThe tree logging code allows individual files or directories to be logged\nwithout including operations on other files and directories in the FS.\nIt tries to commit the minimal set of changes to disk in order to\nfsync the single file or directory that was sent to fsync or O_SYNC.\n\nThe tree logging code was allowing files and directories to be unlinked\nif they were part of a rename operation where only one directory\nin the rename was in the fsync log.  This patch adds a few new rules\nto the tree logging.\n\n1) on rename or unlink, if the inode being unlinked isn\u0027t in the fsync\nlog, we must force a full commit before doing an fsync of the directory\nwhere the unlink was done.  The commit isn\u0027t done during the unlink,\nbut it is forced the next time we try to log the parent directory.\n\nSolution: record transid of last unlink/rename per directory when the\ndirectory wasn\u0027t already logged.  For renames this is only done when\nrenaming to a different directory.\n\nmkdir foo/some_dir\nnormal commit\nrename foo/some_dir foo2/some_dir\nmkdir foo/some_dir\nfsync foo/some_dir/some_file\n\nThe fsync above will unlink the original some_dir without recording\nit in its new location (foo2).  After a crash, some_dir will be gone\nunless the fsync of some_file forces a full commit\n\n2) we must log any new names for any file or dir that is in the fsync\nlog.  This way we make sure not to lose files that are unlinked during\nthe same transaction.\n\n2a) we must log any new names for any file or dir during rename\nwhen the directory they are being removed from was logged.\n\n2a is actually the more important variant.  Without the extra logging\na crash might unlink the old name without recreating the new one\n\n3) after a crash, we must go through any directories with a link count\nof zero and redo the rm -rf\n\nmkdir f1/foo\nnormal commit\nrm -rf f1/foo\nfsync(f1)\n\nThe directory f1 was fully removed from the FS, but fsync was never\ncalled on f1, only its parent dir.  After a crash the rm -rf must\nbe replayed.  This must be able to recurse down the entire\ndirectory tree.  The inode link count fixup code takes care of the\nugly details.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n"
    },
    {
      "commit": "e02119d5a7b4396c5a872582fddc8bd6d305a70a",
      "tree": "825efe2a79dbca8d61256183f3526a5b5dc40dc6",
      "parents": [
        "a1b32a5932cfac7c38b442582285f3da2a09dfd8"
      ],
      "author": {
        "name": "Chris Mason",
        "email": "chris.mason@oracle.com",
        "time": "Fri Sep 05 16:13:11 2008 -0400"
      },
      "committer": {
        "name": "Chris Mason",
        "email": "chris.mason@oracle.com",
        "time": "Thu Sep 25 11:04:07 2008 -0400"
      },
      "message": "Btrfs: Add a write ahead tree log to optimize synchronous operations\n\nFile syncs and directory syncs are optimized by copying their\nitems into a special (copy-on-write) log tree.  There is one log tree per\nsubvolume and the btrfs super block points to a tree of log tree roots.\n\nAfter a crash, items are copied out of the log tree and back into the\nsubvolume.  See tree-log.c for all the details.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n"
    }
  ]
}