1. 23 11月, 2010 1 次提交
  2. 25 10月, 2010 3 次提交
  3. 24 10月, 2010 3 次提交
    • B
      NFS: Readdir plus in v4 · 82f2e547
      Bryan Schumaker 提交于
      By requsting more attributes during a readdir, we can mimic the readdir plus
      operation that was in NFSv3.
      
      To test, I ran the command `ls -lU --color=none` on directories with various
      numbers of files.  Without readdir plus, I see this:
      
      n files |    100    |   1,000   |  10,000   |  100,000  | 1,000,000
      --------+-----------+-----------+-----------+-----------+----------
      real    | 0m00.153s | 0m00.589s | 0m05.601s | 0m56.691s | 9m59.128s
      user    | 0m00.007s | 0m00.007s | 0m00.077s | 0m00.703s | 0m06.800s
      sys     | 0m00.010s | 0m00.070s | 0m00.633s | 0m06.423s | 1m10.005s
      access  | 3         | 1         | 1         | 4         | 31
      getattr | 2         | 1         | 1         | 1         | 1
      lookup  | 104       | 1,003     | 10,003    | 100,003   | 1,000,003
      readdir | 2         | 16        | 158       | 1,575     | 15,749
      total   | 111       | 1,021     | 10,163    | 101,583   | 1,015,784
      
      With readdir plus enabled, I see this:
      
      n files |    100    |   1,000   |  10,000   |  100,000  | 1,000,000
      --------+-----------+-----------+-----------+-----------+----------
      real    | 0m00.115s | 0m00.206s | 0m01.079s | 0m12.521s | 2m07.528s
      user    | 0m00.003s | 0m00.003s | 0m00.040s | 0m00.290s | 0m03.296s
      sys     | 0m00.007s | 0m00.020s | 0m00.120s | 0m01.357s | 0m17.556s
      access  | 3         | 1         | 1         | 1         | 7
      getattr | 2         | 1         | 1         | 1         | 1
      lookup  | 4         | 3         | 3         | 3         | 3
      readdir | 6         | 62        | 630       | 6,300     | 62,993
      total   | 15        | 67        | 635       | 6,305     | 63,004
      
      Readdir plus disabled has about a 16x increase in the number of rpc calls and
      is 4 - 5 times slower on large directories.
      Signed-off-by: NBryan Schumaker <bjschuma@netapp.com>
      Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      82f2e547
    • B
      NFS: readdir with vmapped pages · 56e4ebf8
      Bryan Schumaker 提交于
      We can use vmapped pages to read more information from the network at once.
      This will reduce the number of calls needed to complete a readdir.
      Signed-off-by: NBryan Schumaker <bjschuma@netapp.com>
      [trondmy: Added #include for linux/vmalloc.h> in fs/nfs/dir.c]
      Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      56e4ebf8
    • B
      NFS: decode_dirent should use an xdr_stream · babddc72
      Bryan Schumaker 提交于
      Convert nfs*xdr.c to use an xdr stream in decode_dirent.  This will prevent a
      kernel oops that has been occuring when reading a vmapped page.
      Signed-off-by: NBryan Schumaker <bjschuma@netapp.com>
      Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      babddc72
  4. 24 9月, 2010 1 次提交
  5. 18 9月, 2010 3 次提交
  6. 17 9月, 2010 2 次提交
  7. 31 7月, 2010 2 次提交
  8. 23 6月, 2010 1 次提交
  9. 15 5月, 2010 2 次提交
  10. 15 12月, 2009 1 次提交
  11. 06 12月, 2009 2 次提交
  12. 04 12月, 2009 1 次提交
  13. 18 6月, 2009 16 次提交
  14. 28 3月, 2009 1 次提交
  15. 20 3月, 2009 1 次提交
    • T
      NFS: Optimise NFS close() · 7fe5c398
      Trond Myklebust 提交于
      Close-to-open cache consistency rules really only require us to flush out
      writes on calls to close(), and require us to revalidate attributes on the
      very last close of the file.
      
      Currently we appear to be doing a lot of extra attribute revalidation
      and cache flushes.
      Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      7fe5c398