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| author | Christoph Hellwig <hch@infradead.org> | 2012-03-27 10:34:48 -0400 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2012-05-14 16:20:18 -0500 |
| commit | f38996f5768713fb60e1d2de66c097367d54bb6a (patch) | |
| tree | 42135e66d1a3e90aede209d491dec9304e36d703 /fs/xfs/xfs_iops.c | |
| parent | 467f78992a0743e0e71729e4faa20b67b0f25289 (diff) | |
| download | talos-obmc-linux-f38996f5768713fb60e1d2de66c097367d54bb6a.tar.gz talos-obmc-linux-f38996f5768713fb60e1d2de66c097367d54bb6a.zip | |
xfs: reduce ilock hold times in xfs_setattr_size
We do not need the ilock for most checks done in the beginning of
xfs_setattr_size. Replace the long critical section before starting the
transaction with a smaller one around xfs_zero_eof and an optional one
inside xfs_qm_dqattach that isn't entered unless using quotas. While
this isn't a big optimization for xfs_setattr_size itself it will allow
pushing the ilock into xfs_zero_eof itself later.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs/xfs_iops.c')
| -rw-r--r-- | fs/xfs/xfs_iops.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index 3011b879f850..0a80543644c8 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -700,7 +700,7 @@ xfs_setattr_size( xfs_off_t oldsize, newsize; struct xfs_trans *tp; int error; - uint lock_flags; + uint lock_flags = 0; uint commit_flags = 0; trace_xfs_setattr(ip); @@ -720,10 +720,10 @@ xfs_setattr_size( ATTR_MTIME_SET|ATTR_KILL_SUID|ATTR_KILL_SGID| ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); - lock_flags = XFS_ILOCK_EXCL; - if (!(flags & XFS_ATTR_NOLOCK)) + if (!(flags & XFS_ATTR_NOLOCK)) { lock_flags |= XFS_IOLOCK_EXCL; - xfs_ilock(ip, lock_flags); + xfs_ilock(ip, lock_flags); + } oldsize = inode->i_size; newsize = iattr->ia_size; @@ -746,7 +746,7 @@ xfs_setattr_size( /* * Make sure that the dquots are attached to the inode. */ - error = xfs_qm_dqattach_locked(ip, 0); + error = xfs_qm_dqattach(ip, 0); if (error) goto out_unlock; @@ -764,12 +764,12 @@ xfs_setattr_size( * before the inode is joined to the transaction to modify * i_size. */ + xfs_ilock(ip, XFS_ILOCK_EXCL); error = xfs_zero_eof(ip, newsize, oldsize); + xfs_iunlock(ip, XFS_ILOCK_EXCL); if (error) goto out_unlock; } - xfs_iunlock(ip, XFS_ILOCK_EXCL); - lock_flags &= ~XFS_ILOCK_EXCL; /* * We are going to log the inode size change in this transaction so |
