* [PATCH RESEND] blk-mq: update hctx->dispatch_busy in case of real scheduler
@ 2021-06-25 2:02 Ming Lei
2021-06-25 15:50 ` Jens Axboe
0 siblings, 1 reply; 2+ messages in thread
From: Ming Lei @ 2021-06-25 2:02 UTC (permalink / raw)
To: Jens Axboe; +Cc: linux-block, Ming Lei, Jan Kara
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
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH RESEND] blk-mq: update hctx->dispatch_busy in case of real scheduler
2021-06-25 2:02 [PATCH RESEND] blk-mq: update hctx->dispatch_busy in case of real scheduler Ming Lei
@ 2021-06-25 15:50 ` Jens Axboe
0 siblings, 0 replies; 2+ messages in thread
From: Jens Axboe @ 2021-06-25 15:50 UTC (permalink / raw)
To: Ming Lei; +Cc: linux-block, Jan Kara
On 6/24/21 8:02 PM, Ming Lei wrote:
> 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.
Applied, thanks.
--
Jens Axboe
^ permalink raw reply [flat|nested] 2+ messages in thread
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