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: <ccf8a93f-2948-4774-87e5-acf7c03b9941@yukuai.org.cn>
Date: Thu, 16 Oct 2025 00:32:40 +0800
From: Yu Kuai <hailan@...uai.org.cn>
To: Jens Axboe <axboe@...nel.dk>, 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()

Hi,

在 2025/10/15 21:48, Jens Axboe 写道:
> 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.

Thanks! Sorry that I do forget about this.
Kuai