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From: Ming Lei <ming.lei@redhat.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, Ming Lei <ming.lei@redhat.com>,
	Jan Kara <jack@suse.cz>
Subject: [PATCH RESEND] blk-mq: update hctx->dispatch_busy in case of real scheduler
Date: Fri, 25 Jun 2021 10:02:48 +0800	[thread overview]
Message-ID: <20210625020248.1630497-1-ming.lei@redhat.com> (raw)

Commit 6e6fcbc27e77 ("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: 6e6fcbc27e77 ("blk-mq: support batching dispatch in case of io")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
 block/blk-mq.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index df5dc3b756f5..8fe75ec2b052 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1252,9 +1252,6 @@ 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)
-- 
2.31.1


             reply	other threads:[~2021-06-25  2:03 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-25  2:02 Ming Lei [this message]
2021-06-25 15:50 ` [PATCH RESEND] blk-mq: update hctx->dispatch_busy in case of real scheduler Jens Axboe

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