diff mbox

blk-mq: Avoid that request queue removal can trigger list corruption

Message ID 20171108182345.8616-1-bart.vanassche@wdc.com (mailing list archive)
State Not Applicable
Headers show

Commit Message

Bart Van Assche Nov. 8, 2017, 6:23 p.m. UTC
Avoid that removal of a request queue sporadically triggers the
following warning:

list_del corruption. next->prev should be ffff8807d649b970, but was 6b6b6b6b6b6b6b6b
WARNING: CPU: 3 PID: 342 at lib/list_debug.c:56 __list_del_entry_valid+0x92/0xa0
Call Trace:
 process_one_work+0x11b/0x660
 worker_thread+0x3d/0x3b0
 kthread+0x129/0x140
 ret_from_fork+0x27/0x40

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
---
 block/blk-core.c | 1 +
 1 file changed, 1 insertion(+)

Comments

Jens Axboe Nov. 8, 2017, 6:32 p.m. UTC | #1
On 11/08/2017 11:23 AM, Bart Van Assche wrote:
> Avoid that removal of a request queue sporadically triggers the
> following warning:
> 
> list_del corruption. next->prev should be ffff8807d649b970, but was 6b6b6b6b6b6b6b6b
> WARNING: CPU: 3 PID: 342 at lib/list_debug.c:56 __list_del_entry_valid+0x92/0xa0
> Call Trace:
>  process_one_work+0x11b/0x660
>  worker_thread+0x3d/0x3b0
>  kthread+0x129/0x140
>  ret_from_fork+0x27/0x40

Looks good to me, applied.
diff mbox

Patch

diff --git a/block/blk-core.c b/block/blk-core.c
index 25ccddd0b82a..1b80d43fcbc6 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -339,6 +339,7 @@  void blk_sync_queue(struct request_queue *q)
 		struct blk_mq_hw_ctx *hctx;
 		int i;
 
+		cancel_delayed_work_sync(&q->requeue_work);
 		queue_for_each_hw_ctx(q, hctx, i)
 			cancel_delayed_work_sync(&hctx->run_work);
 	} else {