)]}'
{
  "commit": "1d54ad6da9192fed5dd3b60224d9f2dfea0dcd82",
  "tree": "fd5917f144ec820b933795bedd7eddea96bee374",
  "parents": [
    "9908c30997b8a73c95f836170b9998dae9aa3f4a"
  ],
  "author": {
    "name": "Li Zefan",
    "email": "lizf@cn.fujitsu.com",
    "time": "Tue Apr 14 14:00:05 2009 +0800"
  },
  "committer": {
    "name": "Ingo Molnar",
    "email": "mingo@elte.hu",
    "time": "Thu Apr 16 10:10:59 2009 +0200"
  },
  "message": "blktrace: add trace/ to /sys/block/sda\n\nImpact: allow ftrace-plugin blktrace to trace device-mapper devices\n\nTo trace a single partition:\n  # echo 1 \u003e /sys/block/sda/sda1/enable\n\nTo trace the whole sda instead:\n  # echo 1 \u003e /sys/block/sda/enable\n\nThus we also fix an issue reported by Ted, that ftrace-plugin blktrace\ncan\u0027t be used to trace device-mapper devices.\n\nNow:\n\n  # echo 1 \u003e /sys/block/dm-0/trace/enable\n  echo: write error: No such device or address\n  # mount -t ext4 /dev/dm-0 /mnt\n  # echo 1 \u003e /sys/block/dm-0/trace/enable\n  # echo blk \u003e /debug/tracing/current_tracer\n\nReported-by: Theodore Tso \u003ctytso@mit.edu\u003e\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Shawn Du \u003cduyuyang@gmail.com\u003e\nCc: Jens Axboe \u003cjens.axboe@oracle.com\u003e\nLKML-Reference: \u003c49E42665.6020506@cn.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "73f36beff5cd58c85ca0111df6ea4061ab2d27c0",
      "old_mode": 33188,
      "old_path": "block/blk-sysfs.c",
      "new_id": "8653d710b39e1349930820cda295bba2406c3a82",
      "new_mode": 33188,
      "new_path": "block/blk-sysfs.c"
    },
    {
      "type": "modify",
      "old_id": "267edc4017eefd43d0096b0ddbf20a70257b5c82",
      "old_mode": 33188,
      "old_path": "include/linux/blktrace_api.h",
      "new_id": "62763c9528546879311a443feedcd10bf91827e3",
      "new_mode": 33188,
      "new_path": "include/linux/blktrace_api.h"
    },
    {
      "type": "modify",
      "old_id": "d10989880520fcf246cff4a7723717521239b026",
      "old_mode": 33188,
      "old_path": "kernel/trace/blktrace.c",
      "new_id": "8e7c5da3a3e6d8de59cfe0e778b24d82445619e8",
      "new_mode": 33188,
      "new_path": "kernel/trace/blktrace.c"
    }
  ]
}