1. 25 Jan, 2008 1 commit
    • Steven Whitehouse's avatar
      [GFS2] Remove "reclaim limit" · c2932e03
      Steven Whitehouse authored
      
      
      This call to reclaim glocks is not needed, and in particular we don't want it
      in the fast path for locking glocks. The limit was entirely arbitrary anyway
      and we can't expect users to adjust things like this, the remaining code will
      do the right thing on its own.
      
      Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
      c2932e03
  2. 12 Oct, 2007 1 commit
  3. 10 Oct, 2007 1 commit
  4. 02 May, 2007 1 commit
  5. 05 Feb, 2007 3 commits
    • Steven Whitehouse's avatar
      [GFS2] Remove the "greedy" function from glock.[ch] · e5dab552
      Steven Whitehouse authored
      
      
      The "greedy" code was an attempt to retain glocks for a minimum length
      of time when they relate to mmap()ed files. The current implementation
      of this feature is not, however, ideal in that it required allocating
      memory in order to do this and its overly complicated.
      
      It also misses the mark by ignoring the other I/O operations which are
      just as likely to suffer from the same problem. So the plan is to remove
      this now and then add the functionality back as part of the glock state
      machine at a later date (and thus take into account all the possible
      users of this feature)
      
      Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
      e5dab552
    • Steven Whitehouse's avatar
      [GFS2] Remove max_atomic_write tunable · 330005c2
      Steven Whitehouse authored
      
      
      This removes an unused sysfs tunable parameter.
      
      Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
      330005c2
    • Steven Whitehouse's avatar
      [GFS2] Clean up/speed up readdir · 3699e3a4
      Steven Whitehouse authored
      
      
      This removes the extra filldir callback which gfs2 was using to
      enclose an attempt at readahead for inodes during readdir. The
      code was too complicated and also hurts performance badly in the
      case that the getdents64/readdir call isn't being followed by
      stat() and it wasn't even getting it right all the time when it
      was.
      
      As a result, on my test box an "ls" of a directory containing 250000
      files fell from about 7mins (freshly mounted, so nothing cached) to
      between about 15 to 25 seconds. When the directory content was cached,
      the time taken fell from about 3mins to about 4 or 5 seconds.
      
      Interestingly in the cached case, running "ls -l" once reduced the time
      taken for subsequent runs of "ls" to about 6 secs even without this
      patch. Now it turns out that there was a special case of glocks being
      used for prefetching the metadata, but because of the timeouts for these
      locks (set to 10 secs) the metadata was being timed out before it was
      being used and this the prefetch code was constantly trying to prefetch
      the same data over and over.
      
      Calling "ls -l" meant that the inodes were brought into memory and once
      the inodes are cached, the glocks are not disposed of until the inodes
      are pushed out of the cache, thus extending the lifetime of the glocks,
      and thus bringing down the time for subsequent runs of "ls"
      considerably.
      
      Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
      3699e3a4
  6. 30 Nov, 2006 1 commit
  7. 19 Sep, 2006 1 commit
  8. 18 Sep, 2006 1 commit
  9. 07 Sep, 2006 1 commit
  10. 05 Sep, 2006 2 commits
  11. 04 Sep, 2006 2 commits
  12. 01 Sep, 2006 1 commit
    • Steven Whitehouse's avatar
      [GFS2] Update copyright, tidy up incore.h · e9fc2aa0
      Steven Whitehouse authored
      
      
      As per comments from Jan Engelhardt <jengelh@linux01.gwdg.de> this
      updates the copyright message to say "version" in full rather than
      "v.2". Also incore.h has been updated to remove forward structure
      declarations which are not required.
      
      The gfs2_quota_lvb structure has now had endianess annotations added
      to it. Also quota.c has been updated so that we now store the
      lvb data locally in endian independant format to avoid needing
      a structure in host endianess too. As a result the endianess
      conversions are done as required at various points and thus the
      conversion routines in lvb.[ch] are no longer required. I've
      moved the one remaining constant in lvb.h thats used into lm.h
      and removed the unused lvb.[ch].
      
      I have not changed the HIF_ constants. That is left to a later patch
      which I hope will unify the gh_flags and gh_iflags fields of the
      struct gfs2_holder.
      
      Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>
      Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
      e9fc2aa0
  13. 14 Jun, 2006 1 commit
    • Steven Whitehouse's avatar
      [GFS2] Fix unlinked file handling · feaa7bba
      Steven Whitehouse authored
      
      
      This patch fixes the way we have been dealing with unlinked,
      but still open files. It removes all limits (other than memory
      for inodes, as per every other filesystem) on numbers of these
      which we can support on GFS2. It also means that (like other
      fs) its the responsibility of the last process to close the file
      to deallocate the storage, rather than the person who did the
      unlinking. Note that with GFS2, those two events might take place
      on different nodes.
      
      Also there are a number of other changes:
      
       o We use the Linux inode subsystem as it was intended to be
      used, wrt allocating GFS2 inodes
       o The Linux inode cache is now the point which we use for
      local enforcement of only holding one copy of the inode in
      core at once (previous to this we used the glock layer).
       o We no longer use the unlinked "special" file. We just ignore it
      completely. This makes unlinking more efficient.
       o We now use the 4th block allocation state. The previously unused
      state is used to track unlinked but still open inodes.
       o gfs2_inoded is no longer needed
       o Several fields are now no longer needed (and removed) from the in
      core struct gfs2_inode
       o Several fields are no longer needed (and removed) from the in core
      superblock
      
      There are a number of future possible optimisations and clean ups
      which have been made possible by this patch.
      
      Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
      feaa7bba
  14. 18 May, 2006 2 commits
  15. 27 Feb, 2006 1 commit
    • Steven Whitehouse's avatar
      [GFS2] Macros removal in gfs2.h · 5c676f6d
      Steven Whitehouse authored
      
      
      As suggested by Pekka Enberg <penberg@cs.helsinki.fi>.
      
      The DIV_RU macro is renamed DIV_ROUND_UP and and moved to kernel.h
      The other macros are gone from gfs2.h as (although not requested
      by Pekka Enberg) are a number of included header file which are now
      included individually. The inode number comparison function is
      now an inline function.
      
      The DT2IF and IF2DT may be addressed in a future patch.
      
      Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
      5c676f6d
  16. 23 Feb, 2006 1 commit
  17. 21 Feb, 2006 1 commit
  18. 16 Jan, 2006 1 commit