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authorChristoph Hellwig <hch@infradead.org>2011-08-27 14:45:11 +0000
committerAlex Elder <aelder@sgi.com>2011-10-11 21:15:01 -0500
commit859f57ca00805e6c482eef1a7ab073097d02c8ca (patch)
treec39d3e719c396667804a50afd37d7f8364f84388
parent4a06fd262dbeb70a2c315f7259e063efa493fe3d (diff)
xfs: avoid synchronous transactions when deleting attr blocks
Currently xfs_attr_inactive causes a synchronous transactions if we are removing a file that has any extents allocated to the attribute fork, and thus makes XFS extremely slow at removing files with out of line extended attributes. The code looks a like a relict from the days before the busy extent list, but with the busy extent list we avoid reusing data and attr extents that have been freed but not commited yet, so this code is just as superflous as the synchronous transactions for data blocks. Signed-off-by: Christoph Hellwig <hch@lst.de> Reported-by: Bernd Schubert <bernd.schubert@itwm.fraunhofer.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
-rw-r--r--fs/xfs/xfs_attr.c12
-rw-r--r--fs/xfs/xfs_bmap.c10
2 files changed, 1 insertions, 21 deletions
diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c
index 8f0f65833500..3dd5c9c374cb 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/xfs_attr.c
@@ -823,18 +823,6 @@ xfs_attr_inactive(xfs_inode_t *dp)
if (error)
goto out;
- /*
- * Signal synchronous inactive transactions unless this is a
- * synchronous mount filesystem in which case we know that we're here
- * because we've been called out of xfs_inactive which means that the
- * last reference is gone and the unlink transaction has already hit
- * the disk so async inactive transactions are safe.
- */
- if (!(mp->m_flags & XFS_MOUNT_WSYNC)) {
- if (dp->i_d.di_anextents > 0)
- xfs_trans_set_sync(trans);
- }
-
error = xfs_itruncate_extents(&trans, dp, XFS_ATTR_FORK, 0);
if (error)
goto out;
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 452a291383ab..a6075c0f8456 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -3782,19 +3782,11 @@ xfs_bmap_compute_maxlevels(
* Routine to be called at transaction's end by xfs_bmapi, xfs_bunmapi
* caller. Frees all the extents that need freeing, which must be done
* last due to locking considerations. We never free any extents in
- * the first transaction. This is to allow the caller to make the first
- * transaction a synchronous one so that the pointers to the data being
- * broken in this transaction will be permanent before the data is actually
- * freed. This is necessary to prevent blocks from being reallocated
- * and written to before the free and reallocation are actually permanent.
- * We do not just make the first transaction synchronous here, because
- * there are more efficient ways to gain the same protection in some cases
- * (see the file truncation code).
+ * the first transaction.
*
* Return 1 if the given transaction was committed and a new one
* started, and 0 otherwise in the committed parameter.
*/
-/*ARGSUSED*/
int /* error */
xfs_bmap_finish(
xfs_trans_t **tp, /* transaction pointer addr */