)]}'
{
  "commit": "02b709df817c0db174f249cc59e5f7fd01b64d92",
  "tree": "f1e6af927573507e503f3cddfb5bae457a24f72c",
  "parents": [
    "de5604231ce4bc8db1bc1dcd27d8540cbedf1518"
  ],
  "author": {
    "name": "Nick Piggin",
    "email": "npiggin@suse.de",
    "time": "Mon Feb 01 22:25:57 2010 +1100"
  },
  "committer": {
    "name": "Linus Torvalds",
    "email": "torvalds@linux-foundation.org",
    "time": "Tue Feb 02 12:50:47 2010 -0800"
  },
  "message": "mm: purge fragmented percpu vmap blocks\n\nImprove handling of fragmented per-CPU vmaps.  We previously don\u0027t free\nup per-CPU maps until all its addresses have been used and freed.  So\nfragmented blocks could fill up vmalloc space even if they actually had\nno active vmap regions within them.\n\nAdd some logic to allow all CPUs to have these blocks purged in the case\nof failure to allocate a new vm area, and also put some logic to trim\nsuch blocks of a current CPU if we hit them in the allocation path (so\nas to avoid a large build up of them).\n\nChristoph reported some vmap allocation failures when using the per CPU\nvmap APIs in XFS, which cannot be reproduced after this patch and the\nprevious bug fix.\n\nCc: linux-mm@kvack.org\nCc: stable@kernel.org\nTested-by: Christoph Hellwig \u003chch@infradead.org\u003e\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\n--\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "cf76ff6ba596bf0cdead3fb226202a8db03d24b4",
      "old_mode": 33188,
      "old_path": "mm/vmalloc.c",
      "new_id": "ae007462b7f6e8c2463d83edc2d202107f996a32",
      "new_mode": 33188,
      "new_path": "mm/vmalloc.c"
    }
  ]
}