)]}'
{
  "commit": "01edede41e352e4879a89cdc5468f72ffc89b713",
  "tree": "5467323ee7ed8ff6178fcdae44e9f3ddab078308",
  "parents": [
    "01e97f6b897bf06ec83375d691f2f4d57f5b3a09"
  ],
  "author": {
    "name": "Minchan Kim",
    "email": "minchan.kim@gmail.com",
    "time": "Tue Sep 08 21:56:38 2009 +0200"
  },
  "committer": {
    "name": "Jens Axboe",
    "email": "jens.axboe@oracle.com",
    "time": "Fri Sep 11 14:34:34 2009 +0200"
  },
  "message": "block: trace bio queueing trial only when it occurs\n\nIf BIO is discarded or cross over end of device,\nBIO queueing trial doesn\u0027t occur.\n\nActually the trace was called just before make_request at first:\n[PATCH] Block queue IO tracing support (blktrace) as of 2006-03-23\n      2056a782f8e7e65fd4bfd027506b4ce1c5e9ccd4\n\nAnd then 2 patches added some checks between them:\n[PATCH] md: check bio address after mapping through partitions\n        5ddfe9691c91a244e8d1be597b6428fcefd58103,\n[BLOCK] Don\u0027t allow empty barriers to be passed down to\nqueues that don\u0027t grok them\n        51fd77bd9f512ab6cc9df0733ba1caaab89eb957\n\nIt breaks original goal.\nLet\u0027s trace it only when it happens.\n\nSigned-off-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nAcked-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "93051d1516355daec39980bd8660f4003086a4e0",
      "old_mode": 33188,
      "old_path": "block/blk-core.c",
      "new_id": "982d634e67f906077313503c5f2e3ab13def2ce4",
      "new_mode": 33188,
      "new_path": "block/blk-core.c"
    }
  ]
}