linux-kernel - Re: [PATCH] blk-mq: fix stale tag depth for shared sched tags in blk_mq_update_nr

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Message-ID: <9e775775-940f-477b-879f-dd7389f0be31@kernel.dk>
Date: Wed, 15 Oct 2025 07:48:58 -0600
From: Jens Axboe <axboe@...nel.dk>
To: Yu Kuai <yukuai3@...wei.com>, clm@...a.com, nilay@...ux.ibm.com
Cc: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
 yukuai1@...weicloud.com, yi.zhang@...wei.com, yangerkun@...wei.com,
 johnny.chenyi@...wei.com
Subject: Re: [PATCH] blk-mq: fix stale tag depth for shared sched tags in
 blk_mq_update_nr_requests()

On 10/14/25 7:48 PM, Yu Kuai wrote:
> Commit 7f2799c546db ("blk-mq: cleanup shared tags case in
> blk_mq_update_nr_requests()") moves blk_mq_tag_update_sched_shared_tags()
> before q->nr_requests is updated, however, it's still using the old
> q->nr_requests to resize tag depth.
> 
> Fix this problem by passing in expected new tag depth.

Fix looks fine, but you really should add a Link to the bug report, and
also a Reported-by tag. I'll add those.

-- 
Jens Axboe