path: root/fs/xfs/libxfs/xfs_bmap.c
diff options
authorOmar Sandoval <osandov@fb.com>2019-11-26 16:58:08 -0800
committerDarrick J. Wong <darrick.wong@oracle.com>2019-12-02 17:58:51 -0800
commit69ffe5960df16938bccfe1b65382af0b3de51265 (patch)
treeff6718e4f2970c735d9d89c0b63cbfd58fc81f17 /fs/xfs/libxfs/xfs_bmap.c
parentxfs: fix realtime file data space leak (diff)
xfs: don't check for AG deadlock for realtime files in bunmapi
Commit 5b094d6dac04 ("xfs: fix multi-AG deadlock in xfs_bunmapi") added a check in __xfs_bunmapi() to stop early if we would touch multiple AGs in the wrong order. However, this check isn't applicable for realtime files. In most cases, it just makes us do unnecessary commits. However, without the fix from the previous commit ("xfs: fix realtime file data space leak"), if the last and second-to-last extents also happen to have different "AG numbers", then the break actually causes __xfs_bunmapi() to return without making any progress, which sends xfs_itruncate_extents_flags() into an infinite loop. Fixes: 5b094d6dac04 ("xfs: fix multi-AG deadlock in xfs_bunmapi") Signed-off-by: Omar Sandoval <osandov@fb.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to '')
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index c943795b63f2..a9ad1f991ba3 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -5404,7 +5404,7 @@ __xfs_bunmapi(
* Make sure we don't touch multiple AGF headers out of order
* in a single transaction, as that could cause AB-BA deadlocks.
- if (!wasdel) {
+ if (!wasdel && !isrt) {
agno = XFS_FSB_TO_AGNO(mp, del.br_startblock);
if (prev_agno != NULLAGNUMBER && prev_agno > agno)