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  1. 11 1月, 2006 1 次提交
    • C
      [PATCH] per-mountpoint noatime/nodiratime · fc33a7bb
      由 Christoph Hellwig 提交于 
      Turn noatime and nodiratime into per-mount instead of per-sb flags.

After all the preparations this is a rather trivial patch.  The mount code
needs to treat the two options as per-mount instead of per-superblock, and
touch_atime needs to be changed to check the new MNT_ flags in addition to
the MS_ flags that are kept for filesystems that are always
noatime/nodiratime but not user settable anymore.  Besides that core code
only nfs needed an update because it's leaving atime updates to the server
and thus sets the S_NOATIME flag on every inode, but needs to know whether
it's a real noatime mount for an getattr optimization.

While we're at it I've killed the IS_NOATIME/IS_NODIRATIME macros that were
only used by touch_atime.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      fc33a7bb
  3. 09 1月, 2006 1 次提交
    • O
      [PATCH] Fix and add EXPORT_SYMBOL(filemap_write_and_wait) · 28fd1298
      由 OGAWA Hirofumi 提交于 
      This patch add EXPORT_SYMBOL(filemap_write_and_wait) and use it.

See mm/filemap.c:

And changes the filemap_write_and_wait() and filemap_write_and_wait_range().

Current filemap_write_and_wait() doesn't wait if filemap_fdatawrite()
returns error.  However, even if filemap_fdatawrite() returned an
error, it may have submitted the partially data pages to the device.
(e.g. in the case of -ENOSPC)

<quotation>
Andrew Morton writes,

If filemap_fdatawrite() returns an error, this might be due to some
I/O problem: dead disk, unplugged cable, etc.  Given the generally
crappy quality of the kernel's handling of such exceptions, there's a
good chance that the filemap_fdatawait() will get stuck in D state
forever.
</quotation>

So, this patch doesn't wait if filemap_fdatawrite() returns the -EIO.

Trond, could you please review the nfs part?  Especially I'm not sure,
nfs must use the "filemap_fdatawrite(inode->i_mapping) == 0", or not.
Acked-by: NTrond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      28fd1298
  5. 07 1月, 2006 10 次提交
  7. 20 12月, 2005 1 次提交
  9. 04 12月, 2005 2 次提交
    • T
      NFS: Fix a few further cache consistency regressions · 24aa1fe6
      由 Trond Myklebust 提交于 
       Steve Dickson writes:
 Doing the following:
 1. On server:
 $ mkdir ~/t
 $ echo Hello > ~/t/tmp

 2. On client, wait for a string to appear in this file:
 $ until grep -q foo t/tmp ; do echo -n . ; sleep 1 ; done

 3. On server, create a *new* file with the same name containing that
 string:
 $ mv ~/t/tmp ~/t/tmp.old; echo foo > ~/t/tmp

 will show how the client will never (and I mean never ;-) ) see
 the updated file.

 The problem is that we do not update nfsi->cache_change_attribute when the
 file changes on the server (we only update it when our client makes the
 changes). This again means that functions like nfs_check_verifier() will
 fail to register when the parent directory has changed and should trigger
 a dentry lookup revalidation.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      24aa1fe6
    • S
      NFS: Fix cache consistency regression · 223db122
      由 Steve Dickson 提交于 
       Make sure cache_change_attribute is initialized to jiffies
 so when the mtime changes on directory, the directory
 will be refreshed.

 Signed-off by: Steve Dickson <steved@redhat.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      223db122
  11. 26 11月, 2005 1 次提交
    • T
      NFS: Fix a spinlock recursion inside nfs_update_inode() · b37b03b7
      由 Trond Myklebust 提交于 
       In cases where the server has gone insane, nfs_update_inode() may end
 up calling nfs_invalidate_inode(), which again calls stuff that takes
 the inode->i_lock that we're already holding.

 In addition, given the sort of things we have in NFS these days that
 need to be cleaned up on inode release, I'm not sure we should ever
 be calling make_bad_inode().

 Fix up spinlock recursion, and limit nfs_invalidate_inode() to clearing
 the caches, and marking the inode as being stale.

 Thanks to Steve Dickson <SteveD@redhat.com> for spotting this.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      b37b03b7
  13. 07 11月, 2005 1 次提交
  15. 05 11月, 2005 1 次提交
    • T
      NFSv4: Fix problem with OPEN_DOWNGRADE · d530838b
      由 Trond Myklebust 提交于 
       RFC 3530 states that for OPEN_DOWNGRADE "The share_access and share_deny
 bits specified must be exactly equal to the union of the share_access and
 share_deny bits specified for some subset of the OPENs in effect for
 current openowner on the current file.

 Setattr is currently violating the NFSv4 rules for OPEN_DOWNGRADE in that
 it may cause a downgrade from OPEN4_SHARE_ACCESS_BOTH to
 OPEN4_SHARE_ACCESS_WRITE despite the fact that there exists no open file
 with O_WRONLY access mode.

 Fix the problem by replacing nfs4_find_state() with a modified version of
 nfs_find_open_context().
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      d530838b
  17. 31 10月, 2005 1 次提交
  19. 28 10月, 2005 4 次提交
  21. 19 10月, 2005 2 次提交
  23. 18 10月, 2005 2 次提交
  25. 24 9月, 2005 3 次提交
  27. 10 9月, 2005 1 次提交
  29. 19 8月, 2005 3 次提交
    • C
      [PATCH] NFS: Introduce the use of inode->i_lock to protect fields in nfsi · dc59250c
      由 Chuck Lever 提交于 
      Down the road we want to eliminate the use of the global kernel lock entirely
from the NFS client.  To do this, we need to protect the fields in the
nfs_inode structure adequately.  Start by serializing updates to the
"cache_validity" field.

Note this change addresses an SMP hang found by njw@osdl.org, where processes
deadlock because nfs_end_data_update and nfs_revalidate_mapping update the
"cache_validity" field without proper serialization.

Test plan:
 Millions of fsx ops on SMP clients.  Run Nick Wilson's breaknfs program on
 large SMP clients.
Signed-off-by: NChuck Lever <cel@netapp.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      dc59250c
    • C
      [PATCH] NFS: use atomic bitops to manipulate flags in nfsi->flags · 412d582e
      由 Chuck Lever 提交于 
      Introduce atomic bitops to manipulate the bits in the nfs_inode structure's
"flags" field.

Using bitops means we can use a generic wait_on_bit call instead of an ad hoc
locking scheme in fs/nfs/inode.c, so we can remove the "nfs_i_wait" field from
nfs_inode at the same time.

The other new flags field will continue to use bitmask and logic AND and OR.
This permits several flags to be set at the same time efficiently.  The
following patch adds a spin lock to protect these flags, and this spin lock
will later cover other fields in the nfs_inode structure, amortizing the cost
of using this type of serialization.

Test plan:
 Millions of fsx ops on SMP clients.
Signed-off-by: NChuck Lever <cel@netapp.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      412d582e
    • C
      [PATCH] NFS: split nfsi->flags into two fields · 55296809
      由 Chuck Lever 提交于 
      Certain bits in nfsi->flags can be manipulated with atomic bitops, and some
are better manipulated via logical bitmask operations.

This patch splits the flags field into two.  The next patch introduces atomic
bitops for one of the fields.

Test plan:
 Millions of fsx ops on SMP clients.
Signed-off-by: NChuck Lever <cel@netapp.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      55296809
  31. 17 8月, 2005 1 次提交
  33. 23 6月, 2005 5 次提交