[PATCH 4.9 18/72] xfs: dont fail xfs_extent_busy allocation

Greg Kroah-Hartman
2017-04-06T08:42:54Z

From: Christoph Hellwig <hch@lst.de>

commit 5e30c23d13919a718b22d4921dc5c0accc59da27 upstream.

We don't just need the structure to track busy extents which can be
avoided with a synchronous transaction, but also to keep track of
pending discard.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
fs/xfs/xfs_extent_busy.c | 13 +------------
1 file changed, 1 insertion(+), 12 deletions(-)

--- a/fs/xfs/xfs_extent_busy.c
+++ b/fs/xfs/xfs_extent_busy.c
@@ -45,18 +45,7 @@ xfs_extent_busy_insert(
struct rb_node **rbp;
struct rb_node *parent = NULL;

- new = kmem_zalloc(sizeof(struct xfs_extent_busy), KM_MAYFAIL);
- if (!new) {
- /*
- * No Memory! Since it is now not possible to track the free
- * block, make this a synchronous transaction to insure that
- * the block is not reused before this transaction commits.
- */
- trace_xfs_extent_busy_enomem(tp->t_mountp, agno, bno, len);
- xfs_trans_set_sync(tp);
- return;
- }
-
+ new = kmem_zalloc(sizeof(struct xfs_extent_busy), KM_SLEEP);
new->agno = agno;
new->bno = bno;
new->length = len;