)]}'
{
  "commit": "34d8a380d784d1fbea941a68beebdd7f9a3bebdf",
  "tree": "539eb1c942bb7c0bcbba4f709bc360174650212a",
  "parents": [
    "c627f9cc046c7cd93b4525d89377fb409e170a18"
  ],
  "author": {
    "name": "Jack Steiner",
    "email": "steiner@sgi.com",
    "time": "Tue Jul 29 22:33:54 2008 -0700"
  },
  "committer": {
    "name": "Linus Torvalds",
    "email": "torvalds@linux-foundation.org",
    "time": "Wed Jul 30 09:41:47 2008 -0700"
  },
  "message": "GRU Driver: hardware data structures\n\nThis series of patches adds a driver for the SGI UV GRU.  The driver is\nstill in development but it currently compiles for both x86_64 \u0026 IA64.\nAll simple regression tests pass on IA64.  Although features remain to be\nadded, I\u0027d like to start the process of getting the driver into the\nkernel.  Additional kernel drivers will depend on services provide by the\nGRU driver.\n\nThe GRU is a hardware resource located in the system chipset.  The GRU\ncontains memory that is mmaped into the user address space.  This memory\nis used to communicate with the GRU to perform functions such as\nload/store, scatter/gather, bcopy, AMOs, etc.  The GRU is directly\naccessed by user instructions using user virtual addresses.  GRU\ninstructions (ex., bcopy) use user virtual addresses for operands.\n\nThe GRU contains a large TLB that is functionally very similar to\nprocessor TLBs.  Because the external contains a TLB with user virtual\naddress, it requires callouts from the core VM system when certain types\nof changes are made to the process page tables.  There are several MMUOPS\npatches currently being discussed but none has been accepted into the\nkernel.  The GRU driver is built using version V18 from Andrea Arcangeli.\n\nThis patch:\n\nContains the definitions of the hardware GRU data structures that are used\nby the driver to manage the GRU.\n\n[akpm@linux-foundation;org: export hpage_shift]\nSigned-off-by: Jack Steiner \u003csteiner@sgi.com\u003e\nCc: \"Luck, Tony\" \u003ctony.luck@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "c45fc7f5a979b6064b7e8a403de1922b21adf6df",
      "old_mode": 33188,
      "old_path": "arch/ia64/mm/hugetlbpage.c",
      "new_id": "b0f615759e97461052eb154c431487c90d4cbad3",
      "new_mode": 33188,
      "new_path": "arch/ia64/mm/hugetlbpage.c"
    },
    {
      "type": "add",
      "old_id": "0000000000000000000000000000000000000000",
      "old_mode": 0,
      "old_path": "/dev/null",
      "new_id": "d16031d626730b2dd36e0fac1d27264f4c8c9857",
      "new_mode": 33188,
      "new_path": "drivers/misc/sgi-gru/gruhandles.h"
    }
  ]
}