Messages in this thread Patch in this message | | | Date | Thu, 18 Aug 2022 13:24:49 +0800 | From | Ming Lei <> | Subject | Re: stalling IO regression since linux 5.12, through 5.18 |
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On Thu, Aug 18, 2022 at 12:27:04AM -0400, Chris Murphy wrote: > > > On Thu, Aug 18, 2022, at 12:18 AM, Chris Murphy wrote: > > On Thu, Aug 18, 2022, at 12:12 AM, Chris Murphy wrote: > >> On Wed, Aug 17, 2022, at 11:41 PM, Ming Lei wrote: > >> > >>> OK, can you post the blk-mq debugfs log after you trigger it on v5.17? > > Same boot, 3rd log. But the load is above 300 so I kinda need to sysrq+b soon. > > https://drive.google.com/file/d/1375H558kqPTdng439rvG6LuXXWPXLToo/view?usp=sharing >
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);
Thanks, Ming
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