)]}'
{
  "commit": "805f6b5e1cbfedfb9b3d354013e7f4b13a79270f",
  "tree": "73b3380e28c642418a0fa3e5f1da9990919325b5",
  "parents": [
    "4c63f5646e405b5010cc9499419060bf2e838f5b"
  ],
  "author": {
    "name": "Tao Ma",
    "email": "boyu.mt@taobao.com",
    "time": "Fri Mar 11 20:11:59 2011 +0100"
  },
  "committer": {
    "name": "Jens Axboe",
    "email": "jaxboe@fusionio.com",
    "time": "Fri Mar 11 20:11:59 2011 +0100"
  },
  "message": "blktrace: Use rq-\u003ecmd_flags directly in blk_add_trace_rq.\n\nIn blk_add_trace_rq, we only chose the minor 2 bits from\nrequest\u0027s cmd_flags and did some check for discard.\nso most of other flags(e.g, REQ_SYNC) are missing.\n\nFor example, with a sync write after blkparse we get:\n  8,16   1        1     0.001776503  7509  A  WS 1349632 + 1024 \u003c- (8,17) 1347584\n  8,16   1        2     0.001776813  7509  Q  WS 1349632 + 1024 [dd]\n  8,16   1        3     0.001780395  7509  G  WS 1349632 + 1024 [dd]\n  8,16   1        5     0.001783186  7509  I   W 1349632 + 1024 [dd]\n  8,16   1       11     0.001816987  7509  D   W 1349632 + 1024 [dd]\n  8,16   0        2     0.006218192     0  C   W 1349632 + 1024 [0]\n\nSince now we have integrated the flags of both bio and request,\nit is safe to pass rq-\u003ecmd_flags directly to __blk_add_trace.\n\nWith this patch, after a sync write we get:\n  8,16   1        1     0.001776900  5425  A  WS 1189888 + 1024 \u003c- (8,17) 1187840\n  8,16   1        2     0.001777179  5425  Q  WS 1189888 + 1024 [dd]\n  8,16   1        3     0.001780797  5425  G  WS 1189888 + 1024 [dd]\n  8,16   1        5     0.001783402  5425  I  WS 1189888 + 1024 [dd]\n  8,16   1       11     0.001817468  5425  D  WS 1189888 + 1024 [dd]\n  8,16   0        2     0.005640709     0  C  WS 1189888 + 1024 [0]\n\nSigned-off-by: Tao Ma \u003cboyu.mt@taobao.com\u003e\nAcked-by: Jeff Moyer \u003cjmoyer@redhat.com\u003e\nSigned-off-by: Jens Axboe \u003cjaxboe@fusionio.com\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "cbafed7d4f386c77816abb4ffe9d7141af29f446",
      "old_mode": 33188,
      "old_path": "kernel/trace/blktrace.c",
      "new_id": "7aa40f8e182d569bcba8c0a3f33bb0f73b6f4950",
      "new_mode": 33188,
      "new_path": "kernel/trace/blktrace.c"
    }
  ]
}