)]}'
{
  "commit": "b6dcde5c74d1cbf16da37202a14fa187dce6e4c0",
  "tree": "8d99ceec9f8473d171bea309614d0c08e9440db2",
  "parents": [
    "8d8997f34e66124577db52f6e7ee10ab5f869e07"
  ],
  "author": {
    "name": "Anton Blanchard",
    "email": "anton@samba.org",
    "time": "Sun Oct 11 21:47:34 2009 +0000"
  },
  "committer": {
    "name": "Benjamin Herrenschmidt",
    "email": "benh@kernel.crashing.org",
    "time": "Wed Oct 14 16:58:37 2009 +1100"
  },
  "message": "powerpc: Fix hypervisor TLB batching\n\nProfiling of a page fault scalability microbenchmark shows flush_hash_range\nis not calling the batch hpte invalidate hcall (H_BULK_REMOVE).\n\nIt turns out we have a duplicate firmware feature for hcall-bulk and the\ncurrent setup code stops after finding the first match. This meant we never\nbatch and always do individual invalidates.\n\nThe patch below removes the duplicate and shifts FW_FEATURE_CMO to close\nthe gap. With the patch applied the single threaded page fault rate improves\nfrom 217169 to 238755 per second on a POWER5 test box, a 10% improvement.\n\nSigned-off-by: Anton Blanchard \u003canton@samba.org\u003e\nSigned-off-by: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "3a179827528d1b8ad53f998fec23d4fd788c77f1",
      "old_mode": 33188,
      "old_path": "arch/powerpc/include/asm/firmware.h",
      "new_id": "20778a405d7adf7906479778302dce73972f5b78",
      "new_mode": 33188,
      "new_path": "arch/powerpc/include/asm/firmware.h"
    },
    {
      "type": "modify",
      "old_id": "5a707da3f5c2b037aec5654133c90dd82dba4e30",
      "old_mode": 33188,
      "old_path": "arch/powerpc/platforms/pseries/firmware.c",
      "new_id": "0a14d8cd314f7395b2315bd82b20620537c2db7b",
      "new_mode": 33188,
      "new_path": "arch/powerpc/platforms/pseries/firmware.c"
    }
  ]
}