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blk-mq: don't plug for head insertions in blk_execute_rq_nowait
author
Christoph Hellwig
<hch@lst.de>
Thu, 13 Apr 2023 06:40:38 +0000
(08:40 +0200)
committer
Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Thu, 11 May 2023 14:03:22 +0000
(23:03 +0900)
[ 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>
block/blk-mq.c
patch
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diff --git
a/block/blk-mq.c
b/block/blk-mq.c
index
b3ebf60
..
1ab41fb
100644
(file)
--- a/
block/blk-mq.c
+++ b/
block/blk-mq.c
@@
-1313,7
+1313,7
@@
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);