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blk-mq: only flush requests from the plug in blk_mq_submit_bio

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Replace the call to blk_flush_plug_list in blk_mq_submit_bio with a
direct call to blk_mq_flush_plug_list.  This means we do not flush
plug callback from stackable devices, which doesn't really help with
the accumulated requests anyway, and it also means the cached requests
aren't freed here as they can still be used later on.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211020144119.142582-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-10-20 16:41:16 +02:00 committed by Jens Axboe
parent 037057a5a9
commit a214b949d8
1 changed files with 1 additions and 1 deletions
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2
block/blk-mq.c
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@ -2568,7 +2568,7 @@ void blk_mq_submit_bio(struct bio *bio)
} }
if (request_count >= blk_plug_max_rq_count(plug) || last) { if (request_count >= blk_plug_max_rq_count(plug) || last) {
blk_flush_plug_list(plug, false); blk_mq_flush_plug_list(plug, false);
trace_block_plug(q); trace_block_plug(q);
} }