From: Christoph Hellwig <hch@lst.de>
Date: Thu, 13 Apr 2023 08:40:38 +0200
Subject: [PATCH] blk-mq: don't plug for head insertions in
blk_execute_rq_nowait
References: bsc#1012628
Patch-mainline: 6.3.2
Git-commit: 50947d7fe9fa6abe3ddc40769dfb02a51c58edb6
[ Upstream commit 50947d7fe9fa6abe3ddc40769dfb02a51c58edb6 ]
Plugs never insert at head, so don't plug for head insertions.
Fixes: 1c2d2fff6dc0 ("block: wire-up support for passthrough plugging")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
block/blk-mq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index f5bec525..ae08c493 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1345,7 +1345,7 @@ void blk_execute_rq_nowait(struct request *rq, bool at_head)
* device, directly accessing the plug instead of using blk_mq_plug()
* should not have any consequences.
*/
- if (current->plug)
+ if (current->plug && !at_head)
blk_add_rq_to_plug(current->plug, rq);
else
blk_mq_sched_insert_request(rq, at_head, true, false);
--
2.35.3