linux-kernel - Re: [PATCH RFC v2 1/5] elevator: introduce global lock for sq

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Message-ID: <5960be14-b2c1-4865-bd8b-952313a0c841@kernel.org>
Date: Mon, 16 Jun 2025 11:38:40 +0900
From: Damien Le Moal <dlemoal@...nel.org>
To: Yu Kuai <yukuai1@...weicloud.com>, ming.lei@...hat.com,
 yukuai3@...wei.com, tj@...nel.org, josef@...icpanda.com, axboe@...nel.dk
Cc: linux-block@...r.kernel.org, cgroups@...r.kernel.org,
 linux-kernel@...r.kernel.org, yi.zhang@...wei.com, yangerkun@...wei.com,
 johnny.chenyi@...wei.com
Subject: Re: [PATCH RFC v2 1/5] elevator: introduce global lock for sq_shared
 elevator

On 6/14/25 18:25, Yu Kuai wrote:
> From: Yu Kuai <yukuai3@...wei.com>
> 
> Currently, both mq-deadline and bfq have internal global lock, prepare
> to convert them to use this high level lock and support batch request
> dispatching.

There is not enough explanations and what you have is misleading since this is
not just a "preparation" patch as you are adding a lock. So please explain that
in more details.

-- 
Damien Le Moal
Western Digital Research