)]}'
{
  "commit": "0b832a4b93932103d73c0c3f35ef1153e288327b",
  "tree": "77ca1ff445287685dbebf448fdf172d3f951ed89",
  "parents": [
    "325d22df7b19e0116aff3391d3a03f73d0634ded"
  ],
  "author": {
    "name": "Linus Torvalds",
    "email": "torvalds@woody.linux-foundation.org",
    "time": "Tue Nov 13 08:07:31 2007 -0800"
  },
  "committer": {
    "name": "Linus Torvalds",
    "email": "torvalds@woody.linux-foundation.org",
    "time": "Tue Nov 13 08:09:11 2007 -0800"
  },
  "message": "Revert \"ext2/ext3/ext4: add block bitmap validation\"\n\nThis reverts commit 7c9e69faa28027913ee059c285a5ea8382e24b5d, fixing up\nconflicts in fs/ext4/balloc.c manually.\n\nThe cost of doing the bitmap validation on each lookup - even when the\nbitmap is cached - is absolutely prohibitive.  We could, and probably\nshould, do it only when adding the bitmap to the buffer cache.  However,\nright now we are better off just reverting it.\n\nPeter Zijlstra measured the cost of this extra validation as a 85%\ndecrease in cached iozone, and while I had a patch that took it down to\njust 17% by not being _quite_ so stupid in the validation, it was still\na big slowdown that could have been avoided by just doing it right.\n\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Aneesh Kumar \u003caneesh.kumar@linux.vnet.ibm.com\u003e\nCc: Andreas Dilger \u003cadilger@clusterfs.com\u003e\nCc: Mingming Cao \u003ccmm@us.ibm.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "18a42de25b556dd2b311f06619678c4bc06c66e7",
      "old_mode": 33188,
      "old_path": "fs/ext2/balloc.c",
      "new_id": "377ad172d74b1c5e8110393d875d5499f9bfe199",
      "new_mode": 33188,
      "new_path": "fs/ext2/balloc.c"
    },
    {
      "type": "modify",
      "old_id": "7a87d15523be62f1d33c72c4d8a2eba359d45237",
      "old_mode": 33188,
      "old_path": "fs/ext3/balloc.c",
      "new_id": "a8ba7e831278a0f53518edc101cd5517734af33e",
      "new_mode": 33188,
      "new_path": "fs/ext3/balloc.c"
    },
    {
      "type": "modify",
      "old_id": "e906b65448e2ed9da721f68056333eacf4386e98",
      "old_mode": 33188,
      "old_path": "fs/ext4/balloc.c",
      "new_id": "71ee95e534fdcb6c7128aa843accea7b9a082eec",
      "new_mode": 33188,
      "new_path": "fs/ext4/balloc.c"
    }
  ]
}