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xfs: remove invalid barrier optimization from xfs_fsync 

We always need to flush the disk write cache and can't skip it just because
the no inode attributes have changed.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Christoph Hellwig 2010-02-02 10:16:26 +11:00 committed by Dave Chinner
parent 20026d9201
commit e8b217e753
1 changed files with 2 additions and 10 deletions
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12
fs/xfs/xfs_vnodeops.c
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@ -597,7 +597,7 @@ xfs_fsync(
{
xfs_trans_t *tp;
int error = 0;
int log_flushed = 0, changed = 1;
int log_flushed = 0;
xfs_itrace_entry(ip);
@ -627,18 +627,10 @@ xfs_fsync(
* disk yet, the inode will be still be pinned. If it is,
* force the log.
*/
xfs_iunlock(ip, XFS_ILOCK_SHARED);
if (xfs_ipincount(ip)) {
error = _xfs_log_force(ip->i_mount, XFS_LOG_SYNC,
&log_flushed);
} else {
/*
* If the inode is not pinned and nothing has changed
* we don't need to flush the cache.
*/
changed = 0;
}
} else {
/*
@ -673,7 +665,7 @@ xfs_fsync(
xfs_iunlock(ip, XFS_ILOCK_EXCL);
}
if ((ip->i_mount->m_flags & XFS_MOUNT_BARRIER) && changed) {
if (ip->i_mount->m_flags & XFS_MOUNT_BARRIER) {
/*
* If the log write didn't issue an ordered tag we need
* to flush the disk cache for the data device now.