Re: stalling IO regression since linux 5.12, through 5.18

Chris Murphy
2022-08-18T13:50:51Z

On Thu, Aug 18, 2022, at 1:24 AM, Ming Lei wrote:

>
> Also please test the following one too:
>
>
> diff --git a/block/blk-mq.c b/block/blk-mq.c
> index 5ee62b95f3e5..d01c64be08e2 100644
> --- a/block/blk-mq.c
> +++ b/block/blk-mq.c
> @@ -1991,7 +1991,8 @@ bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx
> *hctx, struct list_head *list,
> if (!needs_restart ||
> (no_tag && list_empty_careful(&hctx->dispatch_wait.entry)))
> blk_mq_run_hw_queue(hctx, true);
> - else if (needs_restart && needs_resource)
> + else if (needs_restart && (needs_resource ||
> + blk_mq_is_shared_tags(hctx->flags)))
> blk_mq_delay_run_hw_queue(hctx, BLK_MQ_RESOURCE_DELAY);
>
> blk_mq_update_dispatch_busy(hctx, true);
>

Should I test both patches at the same time, or separately? On top of v5.17 clean, or with b6e68ee82585 still reverted?

--
Chris Murphy