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Commit e8b217e7 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Dave Chinner
Browse files

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: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarDave Chinner <david@fromorbit.com>
parent 20026d92

fs/xfs/xfs_vnodeops.c

+2 −10
Original line number Diff line number Diff line
@@ -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.