)]}'
{
  "commit": "cfb1e33eed48165763edc7a4a067cf5f74898d0b",
  "tree": "d0e0bdd0664615b1f7be6cf770476e16dbcad116",
  "parents": [
    "1af60fbd759d31f565552fea315c2033947cfbe6"
  ],
  "author": {
    "name": "Jeff Moyer",
    "email": "jmoyer@redhat.com",
    "time": "Fri Oct 02 18:57:36 2009 -0400"
  },
  "committer": {
    "name": "Jens Axboe",
    "email": "jens.axboe@oracle.com",
    "time": "Wed Oct 28 09:29:25 2009 +0100"
  },
  "message": "aio: implement request batching\n\nHi,\n\nSome workloads issue batches of small I/O, and the performance is poor\ndue to the call to blk_run_address_space for every single iocb.  Nathan\nRoberts pointed this out, and suggested that by deferring this call\nuntil all I/Os in the iocb array are submitted to the block layer, we\ncan realize some impressive performance gains (up to 30% for sequential\n4k reads in batches of 16).\n\nSigned-off-by: Jeff Moyer \u003cjmoyer@redhat.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "02a2c9340573cf5946e0083187353d4517319844",
      "old_mode": 33188,
      "old_path": "fs/aio.c",
      "new_id": "cf0bef428f880333d9cca1317fe7154eaad40c47",
      "new_mode": 33188,
      "new_path": "fs/aio.c"
    },
    {
      "type": "modify",
      "old_id": "c86d35f142de36416263a83d4dc8d036b9a6fe97",
      "old_mode": 33188,
      "old_path": "fs/direct-io.c",
      "new_id": "3af761c8c5cc49241e63b2f27d419844a97f3c90",
      "new_mode": 33188,
      "new_path": "fs/direct-io.c"
    }
  ]
}