)]}'
{
  "commit": "f79e2abb9bd452d97295f34376dedbec9686b986",
  "tree": "56b9998caa11983556e842fb9a8143d86d765fa3",
  "parents": [
    "d6dfd1310d3562698fd7c3c086f6c239f96394ac"
  ],
  "author": {
    "name": "Andrew Morton",
    "email": "akpm@osdl.org",
    "time": "Fri Mar 31 02:30:42 2006 -0800"
  },
  "committer": {
    "name": "Linus Torvalds",
    "email": "torvalds@g5.osdl.org",
    "time": "Fri Mar 31 12:18:54 2006 -0800"
  },
  "message": "[PATCH] sys_sync_file_range()\n\nRemove the recently-added LINUX_FADV_ASYNC_WRITE and LINUX_FADV_WRITE_WAIT\nfadvise() additions, do it in a new sys_sync_file_range() syscall instead.\nReasons:\n\n- It\u0027s more flexible.  Things which would require two or three syscalls with\n  fadvise() can be done in a single syscall.\n\n- Using fadvise() in this manner is something not covered by POSIX.\n\nThe patch wires up the syscall for x86.\n\nThe sycall is implemented in the new fs/sync.c.  The intention is that we can\nmove sys_fsync(), sys_fdatasync() and perhaps sys_sync() into there later.\n\nDocumentation for the syscall is in fs/sync.c.\n\nA test app (sync_file_range.c) is in\nhttp://www.zip.com.au/~akpm/linux/patches/stuff/ext3-tools.tar.gz.\n\nThe available-to-GPL-modules do_sync_file_range() is for knfsd: \"A COMMIT can\nsay NFS_DATA_SYNC or NFS_FILE_SYNC.  I can skip the -\u003efsync call for\nNFS_DATA_SYNC which is hopefully the more common.\"\n\nNote: the `async\u0027 writeout mode SYNC_FILE_RANGE_WRITE will turn synchronous if\nthe queue is congested.  This is trivial to fix: add a new flag bit, set\nwbc-\u003enonblocking.  But I\u0027m not sure that we want to expose implementation\ndetails down to that level.\n\nNote: it\u0027s notable that we can sync an fd which wasn\u0027t opened for writing.\nSame with fsync() and fdatasync()).\n\nNote: the code takes some care to handle attempts to sync file contents\noutside the 16TB offset on 32-bit machines.  It makes such attempts appear to\nsucceed, for best 32-bit/64-bit compatibility.  Perhaps it should make such\nrequests fail...\n\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Michael Kerrisk \u003cmtk-manpages@gmx.net\u003e\nCc: Ulrich Drepper \u003cdrepper@redhat.com\u003e\nCc: Neil Brown \u003cneilb@cse.unsw.edu.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n",
  "tree_diff": [
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