)]}'
{
  "commit": "729a18663a30a9c8076e3adc2b3e4c866974f935",
  "tree": "14f8e15ffa09d6a583fccdbe2ddf84c7cb8c2246",
  "parents": [
    "a2826aa92e2e14db372eda01d333267258944033"
  ],
  "author": {
    "name": "NeilBrown",
    "email": "neilb@suse.de",
    "time": "Mon Dec 14 12:49:50 2009 +1100"
  },
  "committer": {
    "name": "NeilBrown",
    "email": "neilb@suse.de",
    "time": "Mon Dec 14 12:51:40 2009 +1100"
  },
  "message": "md/raid5: don\u0027t complete make_request on barrier until writes are scheduled\n\nThe post-barrier-flush is sent by md as soon as make_request on the\nbarrier write completes.  For raid5, the data might not be in the\nper-device queues yet.  So for barrier requests, wait for any\npre-reading to be done so that the request will be in the per-device\nqueues.\n\nWe use the \u0027preread_active\u0027 count to check that nothing is still in\nthe preread phase, and delay the decrement of this count until after\nwrite requests have been submitted to the underlying devices.\n\nSigned-off-by: NeilBrown \u003cneilb@suse.de\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "8c9395f2028f54faee1e65d6b663bcb053e67991",
      "old_mode": 33188,
      "old_path": "drivers/md/raid5.c",
      "new_id": "c78d4835b0d6df400da982f5cf58b2cb1050e3a2",
      "new_mode": 33188,
      "new_path": "drivers/md/raid5.c"
    }
  ]
}