path: root/fs/xfs/xfs_buf.c
diff options
authorChristoph Hellwig <hch@infradead.org>2012-07-02 06:00:04 -0400
committerBen Myers <bpm@sgi.com>2012-07-13 12:50:42 -0500
commit08023d6dbe840dc4271805a9ea376fcbdee9f744 (patch)
tree32349d435ec6ff60aed1aea7e17f10fd27242b2b /fs/xfs/xfs_buf.c
parenteb71a12e411fe065f8663e12a8d81d561f9502ee (diff)
xfs: prevent recursion in xfs_buf_iorequest
If the b_iodone handler is run in calling context in xfs_buf_iorequest we can run into a recursion where xfs_buf_iodone_callbacks keeps calling back into xfs_buf_iorequest because an I/O error happened, which keeps calling back into xfs_buf_iorequest. This chain will usually not take long because the filesystem gets shut down because of log I/O errors, but even over a short time it can cause stack overflows if run on the same context. As a short term workaround make sure we always call the iodone handler in workqueue context. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_buf.c')
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 39c5d7622de..d1edfa1a811 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -1355,7 +1355,7 @@ xfs_buf_iorequest(
atomic_set(&bp->b_io_remaining, 1);
- _xfs_buf_ioend(bp, 0);
+ _xfs_buf_ioend(bp, 1);