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blk-mq: update hctx->dispatch_busy in case of real scheduler

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[ Upstream commit cb9516be7708a2a18ec0a19fe3a225b5b3bc92c7 ]

Commit 6e6fcbc27e ("blk-mq: support batching dispatch in case of io")
starts to support io batching submission by using hctx->dispatch_busy.

However, blk_mq_update_dispatch_busy() isn't changed to update hctx->dispatch_busy
in that commit, so fix the issue by updating hctx->dispatch_busy in case
of real scheduler.

Reported-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Fixes: 6e6fcbc27e ("blk-mq: support batching dispatch in case of io")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20210625020248.1630497-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ming Lei 2021-06-25 10:02:48 +08:00 committed by Greg Kroah-Hartman
parent 3e33b1329c
commit 512106ae23
1 changed files with 0 additions and 3 deletions
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3
block/blk-mq.c
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@ -1242,9 +1242,6 @@ static void blk_mq_update_dispatch_busy(struct blk_mq_hw_ctx *hctx, bool busy)
{
unsigned int ewma;
if (hctx->queue->elevator)
return;
ewma = hctx->dispatch_busy;
if (!ewma && !busy)