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authorJeff Layton <jlayton@redhat.com>2017-12-11 06:35:23 -0500
committerJeff Layton <jlayton@redhat.com>2018-01-29 06:42:21 -0500
commitd17260fd5f9cd5c112cbcbbfd3024186d34c02d7 (patch)
tree99f1082e7324412ab4b8c495d04a7daba27880ee /fs/xfs
parente38cf302b2e92a870f23e07c4390e04685779340 (diff)
xfs: avoid setting XFS_ILOG_CORE if i_version doesn't need incrementing
If XFS_ILOG_CORE is already set then go ahead and increment it. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Darrick J. Wong <darrick.wong@oracle.com> Acked-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_trans_inode.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/fs/xfs/xfs_trans_inode.c b/fs/xfs/xfs_trans_inode.c
index 225544327c4f..4a89da4b6fe7 100644
--- a/fs/xfs/xfs_trans_inode.c
+++ b/fs/xfs/xfs_trans_inode.c
@@ -112,15 +112,17 @@ xfs_trans_log_inode(
/*
* First time we log the inode in a transaction, bump the inode change
- * counter if it is configured for this to occur. We don't use
- * inode_inc_version() because there is no need for extra locking around
- * i_version as we already hold the inode locked exclusively for
- * metadata modification.
+ * counter if it is configured for this to occur. While we have the
+ * inode locked exclusively for metadata modification, we can usually
+ * avoid setting XFS_ILOG_CORE if no one has queried the value since
+ * the last time it was incremented. If we have XFS_ILOG_CORE already
+ * set however, then go ahead and bump the i_version counter
+ * unconditionally.
*/
if (!(ip->i_itemp->ili_item.li_desc->lid_flags & XFS_LID_DIRTY) &&
IS_I_VERSION(VFS_I(ip))) {
- inode_inc_iversion(VFS_I(ip));
- flags |= XFS_ILOG_CORE;
+ if (inode_maybe_inc_iversion(VFS_I(ip), flags & XFS_ILOG_CORE))
+ flags |= XFS_ILOG_CORE;
}
tp->t_flags |= XFS_TRANS_DIRTY;