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  1. 31 7月, 2010 1 次提交
  3. 23 6月, 2010 1 次提交
  5. 26 5月, 2010 2 次提交
  7. 28 4月, 2010 1 次提交
  9. 23 4月, 2010 1 次提交
    • T
      NFS: Fix an unstable write data integrity race · 71d0a611
      由 Trond Myklebust 提交于 
      Commit 2c61be0a (NFS: Ensure that the WRITE
and COMMIT RPC calls are always uninterruptible) exposed a race on file
close. In order to ensure correct close-to-open behaviour, we want to wait
for all outstanding background commit operations to complete.

This patch adds an inode flag that indicates if a commit operation is under
way, and provides a mechanism to allow ->write_inode() to wait for its
completion if this is a data integrity flush.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      71d0a611
  11. 10 4月, 2010 3 次提交
  13. 06 3月, 2010 8 次提交
  15. 10 2月, 2010 1 次提交
  17. 27 1月, 2010 2 次提交
  19. 10 12月, 2009 2 次提交
    • T
      NFS: Fix nfs_migrate_page() · 190f38e5
      由 Trond Myklebust 提交于 
      The call to migrate_page() will cause the page->private field to be
cleared.
Also fix up the locking around the page->private transfer, so that we ensure
that calls to nfs_page_find_request() don't end up racing.

Finally, fix up a double free bug: nfs_unlock_request() already calls
nfs_release_request() for us...
Reported-by: NWu Fengguang <fengguang.wu@intel.com>
Tested-by: NAndi Kleen <andi@firstfloor.org>
Cc: stable@kernel.org
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      190f38e5
    • C
      vfs: Implement proper O_SYNC semantics · 6b2f3d1f
      由 Christoph Hellwig 提交于 
      While Linux provided an O_SYNC flag basically since day 1, it took until
Linux 2.4.0-test12pre2 to actually get it implemented for filesystems,
since that day we had generic_osync_around with only minor changes and the
great "For now, when the user asks for O_SYNC, we'll actually give
O_DSYNC" comment.  This patch intends to actually give us real O_SYNC
semantics in addition to the O_DSYNC semantics.  After Jan's O_SYNC
patches which are required before this patch it's actually surprisingly
simple, we just need to figure out when to set the datasync flag to
vfs_fsync_range and when not.

This patch renames the existing O_SYNC flag to O_DSYNC while keeping it's
numerical value to keep binary compatibility, and adds a new real O_SYNC
flag.  To guarantee backwards compatiblity it is defined as expanding to
both the O_DSYNC and the new additional binary flag (__O_SYNC) to make
sure we are backwards-compatible when compiled against the new headers.

This also means that all places that don't care about the differences can
just check O_DSYNC and get the right behaviour for O_SYNC, too - only
places that actuall care need to check __O_SYNC in addition.  Drivers and
network filesystems have been updated in a fail safe way to always do the
full sync magic if O_DSYNC is set.  The few places setting O_SYNC for
lower layers are kept that way for now to stay failsafe.

We enforce that O_DSYNC is set when __O_SYNC is set early in the open path
to make sure we always get these sane options.

Note that parisc really screwed up their headers as they already define a
O_DSYNC that has always been a no-op.  We try to repair it by using it for
the new O_DSYNC and redefinining O_SYNC to send both the traditional
O_SYNC numerical value _and_ the O_DSYNC one.

Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Grant Grundler <grundler@parisc-linux.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andreas Dilger <adilger@sun.com>
Acked-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: NKyle McMartin <kyle@mcmartin.ca>
Acked-by: NUlrich Drepper <drepper@redhat.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NJan Kara <jack@suse.cz>
      6b2f3d1f
  21. 07 12月, 2009 1 次提交
  23. 06 12月, 2009 1 次提交
  25. 05 12月, 2009 1 次提交
  27. 03 12月, 2009 1 次提交
  29. 16 9月, 2009 1 次提交
  31. 12 8月, 2009 1 次提交
  33. 10 8月, 2009 1 次提交
  35. 12 7月, 2009 1 次提交
  37. 11 7月, 2009 2 次提交
  39. 18 6月, 2009 4 次提交
  41. 20 3月, 2009 1 次提交
  43. 12 3月, 2009 2 次提交
    • T
      NFS: Throttle page dirtying while we're flushing to disk · 72cb77f4
      由 Trond Myklebust 提交于 
      The following patch is a combination of a patch by myself and Peter
Staubach.

Trond: If we allow other processes to dirty pages while a process is doing
a consistency sync to disk, we can end up never making progress.

Peter: Attached is a patch which addresses a continuing problem with
the NFS client generating out of order WRITE requests.  While
this is compliant with all of the current protocol
specifications, there are servers in the market which can not
handle out of order WRITE requests very well.  Also, this may
lead to sub-optimal block allocations in the underlying file
system on the server.  This may cause the read throughputs to
be reduced when reading the file from the server.

Peter: There has been a lot of work recently done to address out of
order issues on a systemic level.  However, the NFS client is
still susceptible to the problem.  Out of order WRITE
requests can occur when pdflush is in the middle of writing
out pages while the process dirtying the pages calls
generic_file_buffered_write which calls
generic_perform_write which calls
balance_dirty_pages_rate_limited which ends up calling
writeback_inodes which ends up calling back into the NFS
client to writes out dirty pages for the same file that
pdflush happens to be working with.
Signed-off-by: NPeter Staubach <staubach@redhat.com>
[modification by Trond to merge the two similar patches]
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      72cb77f4
    • T
      NFS: cleanup - remove struct nfs_inode->ncommit · fb8a1f11
      由 Trond Myklebust 提交于 
      Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      fb8a1f11
  45. 08 10月, 2008 1 次提交