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-rw-r--r--fs/xfs/xfs_sync.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/fs/xfs/xfs_sync.c b/fs/xfs/xfs_sync.c
index 1e9ee064dbb..97304f10e78 100644
--- a/fs/xfs/xfs_sync.c
+++ b/fs/xfs/xfs_sync.c
@@ -359,6 +359,15 @@ xfs_quiesce_attr(
* added an item to the AIL, thus flush it again.
*/
xfs_ail_push_all_sync(mp->m_ail);
+
+ /*
+ * The superblock buffer is uncached and xfsaild_push() will lock and
+ * set the XBF_ASYNC flag on the buffer. We cannot do xfs_buf_iowait()
+ * here but a lock on the superblock buffer will block until iodone()
+ * has completed.
+ */
+ xfs_buf_lock(mp->m_sb_bp);
+ xfs_buf_unlock(mp->m_sb_bp);
}
static void
@@ -712,8 +721,8 @@ restart:
* Note that xfs_iflush will never block on the inode buffer lock, as
* xfs_ifree_cluster() can lock the inode buffer before it locks the
* ip->i_lock, and we are doing the exact opposite here. As a result,
- * doing a blocking xfs_itobp() to get the cluster buffer would result
- * in an ABBA deadlock with xfs_ifree_cluster().
+ * doing a blocking xfs_imap_to_bp() to get the cluster buffer would
+ * result in an ABBA deadlock with xfs_ifree_cluster().
*
* As xfs_ifree_cluser() must gather all inodes that are active in the
* cache to mark them stale, if we hit this case we don't actually want