)]}'
{
  "commit": "fde740e4dd4a05ca8957490d468fa9b2770f5bd6",
  "tree": "04bc0221bc6c59379a17f3631fc4bd3c886e1d61",
  "parents": [
    "ff3eb55ed97db3f12964beeffe3d34602d295367"
  ],
  "author": {
    "name": "Robin Holt",
    "email": "holt@sgi.com",
    "time": "Mon Apr 25 13:13:16 2005 -0700"
  },
  "committer": {
    "name": "Tony Luck",
    "email": "tony.luck@intel.com",
    "time": "Mon Apr 25 13:13:16 2005 -0700"
  },
  "message": "[IA64] Percpu quicklist for combined allocator for pgd/pmd/pte.\n\nThis patch introduces using the quicklists for pgd, pmd, and pte levels\nby combining the alloc and free functions into a common set of routines.\nThis greatly simplifies the reading of this header file.\n\nThis patch is simple but necessary for large numa configurations.\nIt simply ensures that only pages from the local node are added to a\ncpus quicklist.  This prevents the trapping of pages on a remote nodes\nquicklist by starting a process, touching a large number of pages to\nfill pmd and pte entries, migrating to another node, and then unmapping\nor exiting.  With those conditions, the pages get trapped and if the\nmachine has more than 100 nodes of the same size, the calculation of\nthe pgtable high water mark will be larger than any single node so page\ntable cache flushing will never occur.\n\nI ran lmbench lat_proc fork and lat_proc exec on a zx1 with and without\nthis patch and did not notice any change.\n\nOn an sn2 machine, there was a slight improvement which is possibly\ndue to pages from other nodes trapped on the test node before starting\nthe run.  I did not investigate further.\n\nThis patch shrinks the quicklist based upon free memory on the node\ninstead of the high/low water marks.  I have written it to enable\npreemption periodically and recalculate the amount to shrink every time\nwe have freed enough pages that the quicklist size should have grown.\nI rescan the nodes zones each pass because other processess may be\ndraining node memory at the same time as we are adding.\n\nSigned-off-by: Robin Holt \u003cholt@sgi.com\u003e\nSigned-off-by: Tony Luck \u003ctony.luck@intel.com\u003e\n",
  "tree_diff": [
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}