In blk_mq_alloc_request_hctx, blk_mq_sched_get_request doesn't
get sw context so we don't need to put the context with
blk_mq_put_ctx. Unless, we will see preempt counter underflow.
Cc: Sagi Grimberg <s...@grimberg.me>
Cc: Omar Sandoval <osan...@fb.com>
Cc: Jens Axboe <ax...@fb.com>
Signed-off-by: Minchan Kim <minc...@kernel.org>
---
Maybe, it would be fixed by someone but I have noticed preempt counter
undeflow problem a few weeks ago and still see the problem with
linux-next.
block/blk-mq.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index a4546f060e80..a6f3998dc4ee 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -321,7 +321,6 @@ struct request *blk_mq_alloc_request_hctx(struct
request_queue *q, int rw,
rq = blk_mq_sched_get_request(q, NULL, rw, &alloc_data);
- blk_mq_put_ctx(alloc_data.ctx);
blk_queue_exit(q);
if (!rq)
--
2.7.4
