)]}'
{
  "commit": "ba38eb4de354d228f2792f93cde2c748a3a3f3b2",
  "tree": "c88a2903398eae9ccd7f0c755f70ca600bcc162b",
  "parents": [
    "924cd8fbe41851eda2b68bf2ed501b2777fd77b4"
  ],
  "author": {
    "name": "Miao Xie",
    "email": "miaox@cn.fujitsu.com",
    "time": "Thu Nov 10 20:45:04 2011 -0500"
  },
  "committer": {
    "name": "Chris Mason",
    "email": "chris.mason@oracle.com",
    "time": "Thu Nov 10 20:45:04 2011 -0500"
  },
  "message": "Btrfs: fix no reserved space for writing out inode cache\n\nI-node cache forgets to reserve the space when writing out it. And when\nwe do some stress test, such as synctest, it will trigger WARN_ON() in\nuse_block_rsv().\n\nWARNING: at fs/btrfs/extent-tree.c:5718 btrfs_alloc_free_block+0xbf/0x281 [btrfs]()\n...\nCall Trace:\n [\u003cffffffff8104df86\u003e] warn_slowpath_common+0x80/0x98\n [\u003cffffffff8104dfb3\u003e] warn_slowpath_null+0x15/0x17\n [\u003cffffffffa0369c60\u003e] btrfs_alloc_free_block+0xbf/0x281 [btrfs]\n [\u003cffffffff810cbcb8\u003e] ? __set_page_dirty_nobuffers+0xfe/0x108\n [\u003cffffffffa035c040\u003e] __btrfs_cow_block+0x118/0x3b5 [btrfs]\n [\u003cffffffffa035c7ba\u003e] btrfs_cow_block+0x103/0x14e [btrfs]\n [\u003cffffffffa035e4c4\u003e] btrfs_search_slot+0x249/0x6a4 [btrfs]\n [\u003cffffffffa036d086\u003e] btrfs_lookup_inode+0x2a/0x8a [btrfs]\n [\u003cffffffffa03788b7\u003e] btrfs_update_inode+0xaa/0x141 [btrfs]\n [\u003cffffffffa036d7ec\u003e] btrfs_save_ino_cache+0xea/0x202 [btrfs]\n [\u003cffffffffa03a761e\u003e] ? btrfs_update_reloc_root+0x17e/0x197 [btrfs]\n [\u003cffffffffa0373867\u003e] commit_fs_roots+0xaa/0x158 [btrfs]\n [\u003cffffffffa03746a6\u003e] btrfs_commit_transaction+0x405/0x731 [btrfs]\n [\u003cffffffff810690df\u003e] ? wake_up_bit+0x25/0x25\n [\u003cffffffffa039d652\u003e] ? btrfs_log_dentry_safe+0x43/0x51 [btrfs]\n [\u003cffffffffa0381c5f\u003e] btrfs_sync_file+0x16a/0x198 [btrfs]\n [\u003cffffffff81122806\u003e] ? mntput+0x21/0x23\n [\u003cffffffff8112d150\u003e] vfs_fsync_range+0x18/0x21\n [\u003cffffffff8112d170\u003e] vfs_fsync+0x17/0x19\n [\u003cffffffff8112d316\u003e] do_fsync+0x29/0x3e\n [\u003cffffffff8112d348\u003e] sys_fsync+0xb/0xf\n [\u003cffffffff81468352\u003e] system_call_fastpath+0x16/0x1b\n\nSometimes it causes BUG_ON() in the reservation code of the delayed inode\nis triggered.\n\nSo we must reserve enough space for inode cache.\n\nNote: If we can not reserve the enough space for inode cache, we will\ngive up writing out it.\n\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "53dcbdf446cdfd859c4afe62560811081d3d1cf5",
      "old_mode": 33188,
      "old_path": "fs/btrfs/inode-map.c",
      "new_id": "f8962a957d656b385d0f99d65f300598e419db4d",
      "new_mode": 33188,
      "new_path": "fs/btrfs/inode-map.c"
    }
  ]
}