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Message-Id: <20210712061012.671834133@linuxfoundation.org>
Date: Mon, 12 Jul 2021 08:07:05 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Jan Kara <jack@...e.cz>,
Ming Lei <ming.lei@...hat.com>, Jens Axboe <axboe@...nel.dk>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.12 342/700] blk-mq: update hctx->dispatch_busy in case of real scheduler
From: Ming Lei <ming.lei@...hat.com>
[ Upstream commit cb9516be7708a2a18ec0a19fe3a225b5b3bc92c7 ]
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@...e.cz>
Reviewed-by: Jan Kara <jack@...e.cz>
Fixes: 6e6fcbc27e77 ("blk-mq: support batching dispatch in case of io")
Signed-off-by: Ming Lei <ming.lei@...hat.com>
Link: https://lore.kernel.org/r/20210625020248.1630497-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
block/blk-mq.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index d06ff908f3d9..6a982a277176 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1223,9 +1223,6 @@ 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)
--
2.30.2
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