linux-kernel - Re: [PATCH v3] blk-mq: check on cpu id when there is only one ctx mapping

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Date:   Wed, 14 Jun 2023 11:11:51 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Ed Tsai <ed.tsai@...iatek.com>
Cc:     matthias.bgg@...il.com, angelogioacchino.delregno@...labora.com,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, kbusch@...nel.org,
        amergnat@...libre.com, liusong@...ux.alibaba.com,
        wsd_upstream@...iatek.com, peter.wang@...iatek.com,
        stanley.chu@...iatek.com, powen.kao@...iatek.com,
        alice.chao@...iatek.com, naomi.chu@...iatek.com,
        Chun-Hung.Wu@...iatek.com
Subject: Re: [PATCH v3] blk-mq: check on cpu id when there is only one ctx
 mapping


On Wed, 14 Jun 2023 08:25:29 +0800, Ed Tsai wrote:
> commit f168420c62e7 ("blk-mq: don't redirect completion for hctx withs
> only one ctx mapping") When nvme applies a 1:1 mapping of hctx and ctx,
> there will be no remote request.
> 
> But for ufs, the submission and completion queues could be asymmetric.
> (e.g. Multiple SQs share one CQ) Therefore, 1:1 mapping of hctx and
> ctx won't complete request on the submission cpu. In this situation,
> this nr_ctx check could violate the QUEUE_FLAG_SAME_FORCE, as a result,
> check on cpu id when there is only one ctx mapping.
> 
> [...]

Applied, thanks!

[1/1] blk-mq: check on cpu id when there is only one ctx mapping
      commit: 30654614f3d27230200b1650f6025a2ce67900b4

Best regards,
-- 
Jens Axboe