)]}'
{
  "commit": "5225c45899e872383ca39f5533d28ec63c54b39e",
  "tree": "29bfc3b18d4f8f39b42e22c8113b6e4c379e0257",
  "parents": [
    "8d330919927ea31fa083b5a80084dc991da813a0"
  ],
  "author": {
    "name": "Frederic Weisbecker",
    "email": "fweisbec@gmail.com",
    "time": "Sun Aug 22 04:29:17 2010 +0200"
  },
  "committer": {
    "name": "Frederic Weisbecker",
    "email": "fweisbec@gmail.com",
    "time": "Fri Aug 27 01:51:36 2010 +0200"
  },
  "message": "perf: Initialize callchains roots\u0027s childen hits\n\nEach histogram entry has a callchain root that stores the\ncallchain samples. However we forgot to initialize the\ntracking of children hits of these roots, which then got\nrandom values on their creation.\n\nThe root children hits is multiplied by the minimum percentage\nof hits provided by the user, and the result becomes the minimum\nhits expected from children branches. If the random value due\nto the uninitialization is big enough, then this minimum number\nof hits can be huge and eventually filter every children branches.\n\nThe end result was invisible callchains. All we need to\nfix this is to initialize the children hits of the root.\n\nReported-by: Christoph Hellwig \u003chch@infradead.org\u003e\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: 2.6.32.x-2.6.35.y \u003cstable@kernel.org\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "624a96c636fdbc36a472ecaadf5fcb72c226bf38",
      "old_mode": 33188,
      "old_path": "tools/perf/util/callchain.h",
      "new_id": "6de4313924fb5c510f354cb3a8e2a73061e103f6",
      "new_mode": 33188,
      "new_path": "tools/perf/util/callchain.h"
    }
  ]
}