* [PATCH] blk-mq: remove unused code exist in blk_mq_dispatch_rq_list
@ 2020-07-17 9:23 yangerkun
2020-07-17 10:03 ` Ming Lei
2020-07-17 13:26 ` Jens Axboe
0 siblings, 2 replies; 3+ messages in thread
From: yangerkun @ 2020-07-17 9:23 UTC (permalink / raw)
To: axboe, ming.lei, linux-block; +Cc: yangerkun
Once .queue_rq return BLK_STS_RESOURCE or BLK_STS_DEV_RESOURCE, we will
insert the rq back to list, and will return false since '(!list_empty)'
always be true. The latter check seems unused.
Signed-off-by: yangerkun <yangerkun@huawei.com>
---
block/blk-mq.c | 7 -------
1 file changed, 7 deletions(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 4e0d173beaa3..5e561283580f 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1361,13 +1361,6 @@ bool blk_mq_dispatch_rq_list(struct request_queue *q, struct list_head *list,
} else
blk_mq_update_dispatch_busy(hctx, false);
- /*
- * If the host/device is unable to accept more work, inform the
- * caller of that.
- */
- if (ret == BLK_STS_RESOURCE || ret == BLK_STS_DEV_RESOURCE)
- return false;
-
return (queued + errors) != 0;
}
--
2.25.4
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] blk-mq: remove unused code exist in blk_mq_dispatch_rq_list
2020-07-17 9:23 [PATCH] blk-mq: remove unused code exist in blk_mq_dispatch_rq_list yangerkun
@ 2020-07-17 10:03 ` Ming Lei
2020-07-17 13:26 ` Jens Axboe
1 sibling, 0 replies; 3+ messages in thread
From: Ming Lei @ 2020-07-17 10:03 UTC (permalink / raw)
To: yangerkun; +Cc: axboe, linux-block
On Fri, Jul 17, 2020 at 05:23:48PM +0800, yangerkun wrote:
> Once .queue_rq return BLK_STS_RESOURCE or BLK_STS_DEV_RESOURCE, we will
> insert the rq back to list, and will return false since '(!list_empty)'
> always be true. The latter check seems unused.
>
> Signed-off-by: yangerkun <yangerkun@huawei.com>
> ---
> block/blk-mq.c | 7 -------
> 1 file changed, 7 deletions(-)
>
> diff --git a/block/blk-mq.c b/block/blk-mq.c
> index 4e0d173beaa3..5e561283580f 100644
> --- a/block/blk-mq.c
> +++ b/block/blk-mq.c
> @@ -1361,13 +1361,6 @@ bool blk_mq_dispatch_rq_list(struct request_queue *q, struct list_head *list,
> } else
> blk_mq_update_dispatch_busy(hctx, false);
>
> - /*
> - * If the host/device is unable to accept more work, inform the
> - * caller of that.
> - */
> - if (ret == BLK_STS_RESOURCE || ret == BLK_STS_DEV_RESOURCE)
> - return false;
> -
> return (queued + errors) != 0;
> }
>
> --
> 2.25.4
>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
--
Ming
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] blk-mq: remove unused code exist in blk_mq_dispatch_rq_list
2020-07-17 9:23 [PATCH] blk-mq: remove unused code exist in blk_mq_dispatch_rq_list yangerkun
2020-07-17 10:03 ` Ming Lei
@ 2020-07-17 13:26 ` Jens Axboe
1 sibling, 0 replies; 3+ messages in thread
From: Jens Axboe @ 2020-07-17 13:26 UTC (permalink / raw)
To: yangerkun, ming.lei, linux-block
On 7/17/20 3:23 AM, yangerkun wrote:
> Once .queue_rq return BLK_STS_RESOURCE or BLK_STS_DEV_RESOURCE, we will
> insert the rq back to list, and will return false since '(!list_empty)'
> always be true. The latter check seems unused.
This check is already gone in for-5.9/block
--
Jens Axboe
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2020-07-17 13:26 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2020-07-17 9:23 [PATCH] blk-mq: remove unused code exist in blk_mq_dispatch_rq_list yangerkun
2020-07-17 10:03 ` Ming Lei
2020-07-17 13:26 ` Jens Axboe
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