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  1. 06 2月, 2007 1 次提交
    • S
      [GFS2] Clean up/speed up readdir · 3699e3a4
      由 Steven Whitehouse 提交于 
      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: NSteven Whitehouse <swhiteho@redhat.com>
      3699e3a4
  3. 09 12月, 2006 1 次提交
  5. 07 12月, 2006 1 次提交
    • S
      [GFS2] Change gfs2_fsync() to use write_inode_now() · 34126f9f
      由 Steven Whitehouse 提交于 
      This is a bit better than the previous version of gfs2_fsync()
although it would be better still if we were able to call a
function which only wrote the inode & metadata. Its no big deal
though that this will potentially write the data as well since
the VFS has already done that before calling gfs2_fsync(). I've
also added a comment to explain whats going on here.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
Cc: Andrew Morton <akpm@osdl.org>
      34126f9f
  7. 30 11月, 2006 7 次提交
  9. 02 10月, 2006 4 次提交
  11. 25 9月, 2006 1 次提交
  13. 20 9月, 2006 1 次提交
  15. 19 9月, 2006 1 次提交
  17. 05 9月, 2006 4 次提交
  19. 01 9月, 2006 1 次提交
    • S
      [GFS2] Update copyright, tidy up incore.h · e9fc2aa0
      由 Steven Whitehouse 提交于 
      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: NSteven Whitehouse <swhiteho@redhat.com>
      e9fc2aa0
  21. 01 8月, 2006 1 次提交
  23. 26 7月, 2006 1 次提交
    • S
      [GFS2] Alter direct I/O path · a9e5f4d0
      由 Steven Whitehouse 提交于 
      As per comments received, alter the GFS2 direct I/O path so that
it uses the standard read functions "out of the box". Needs a
small change to one of the VFS functions. This reduces the size
of the code quite a lot and also removes the need for one new export.

Some more work remains to be done, but this is the bones of the
thing.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
      a9e5f4d0
  25. 21 7月, 2006 1 次提交
  27. 11 7月, 2006 1 次提交
    • S
      [GFS2] Add generation number · 4340fe62
      由 Steven Whitehouse 提交于 
      This adds a generation number for the eventual use of NFS to the
ondisk inode. Its backward compatible with the current code since
it doesn't really matter what the generation number is to start with,
and indeed since its set to zero, due to it being taken from padding
in both the inode and rgrp header, it should be fine.

The eventual plan is to use this rather than no_formal_ino in the
NFS filehandles. At that point no_formal_ino will be unused.

At the same time we also add a releasepages call back to the
"normal" address space for gfs2 inodes. Also I've removed a
one-linrer function thats not required any more.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
      4340fe62
  29. 04 7月, 2006 1 次提交
  31. 24 6月, 2006 1 次提交
  33. 22 6月, 2006 1 次提交
  35. 15 6月, 2006 1 次提交
    • S
      [GFS2] Fix unlinked file handling · feaa7bba
      由 Steven Whitehouse 提交于 
      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: NSteven Whitehouse <swhiteho@redhat.com>
      feaa7bba
  37. 19 5月, 2006 2 次提交
  39. 13 5月, 2006 1 次提交
  41. 26 4月, 2006 1 次提交
  43. 07 4月, 2006 1 次提交
    • S
      [GFS2] Fix a ref count bug and other clean ups · b09e593d
      由 Steven Whitehouse 提交于 
      This fixes a ref count bug that sometimes showed up a umount time
(causing it to hang) but it otherwise mostly harmless. At the same
time there are some clean ups including making the log operations
structures const, moving a memory allocation so that its not done
in the fast path of checking to see if there is an outstanding
transaction related to a particular glock.

Removes the sd_log_wrap varaible which was updated, but never actually
used anywhere. Updates the gfs2 ioctl() to run without the kernel lock
(which it never needed anyway). Removes the "invalidate inodes" loop
from GFS2's put_super routine. This is done in kill super anyway so
we don't need to do it here. The loop was also bogus in that if there
are any inodes "stuck" at this point its a bug and we need to know
about it rather than hide it by hanging forever.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
      b09e593d
  45. 05 4月, 2006 1 次提交
  47. 01 4月, 2006 2 次提交
    • S
      [GFS2] Update GFS2 for the recent pull from Linus · 8628de05
      由 Steven Whitehouse 提交于 
      Some interfaces have changed. In particular one of the posix
locking functions has changed prototype, along with the
address space operation invalidatepage and the block getting
callback to the direct IO function.

In addition add the splice file operations. These will need to
be updated to support AOP_TRUNCATED_PAGE before they will be
of much use to us.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
      8628de05
    • S
      [GFS2] Update ioctl() to new interface · 7ea9ea83
      由 Steven Whitehouse 提交于 
      This is designed as a fs independent way to set flags on a
particular inode. The values of the ioctl() and flags are
designed to be identical to the ext2/3 values. Assuming that
this plan is acceptable to people in general, the plan is to
then move other fs across to using the same set of #defines,
etc.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
      7ea9ea83
  49. 29 3月, 2006 1 次提交
    • S
      [GFS2] Further updates to dir and logging code · 71b86f56
      由 Steven Whitehouse 提交于 
      This reduces the size of the directory code by about 3k and gets
readdir() to use the functions which were introduced in the previous
directory code update.

Two memory allocations are merged into one. Eliminates zeroing of some
buffers which were never used before they were initialised by
other data.

There is still scope for further improvement in the directory code.

On the logging side, a hand created mutex has been replaced by a
standard Linux mutex in the log allocation code.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
      71b86f56
  51. 22 3月, 2006 1 次提交