linux-kernel - Re: [PATCH RFC v2 4/4] block/mq-deadline: introduce min_async

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Message-ID: <db4fae6c-c951-7631-a7b5-1b4515d987e2@huaweicloud.com>
Date: Thu, 19 Dec 2024 09:54:33 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: Bart Van Assche <bvanassche@....org>, Yu Kuai <yukuai1@...weicloud.com>,
 axboe@...nel.dk, akpm@...ux-foundation.org, ming.lei@...hat.com,
 yang.yang@...o.com, osandov@...com, paolo.valente@...aro.org
Cc: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
 yi.zhang@...wei.com, yangerkun@...wei.com, "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH RFC v2 4/4] block/mq-deadline: introduce min_async_depth

Hi,

在 2024/12/19 2:06, Bart Van Assche 写道:
> On 12/17/24 5:12 PM, Yu Kuai wrote:
>> dd->async_depth is initialized to 0 now, functionally I think
>> it's the same as q->nr_requests. And I do explain this in commit
>> message, maybe it's not clear?
> 
> It would be good to add a comment in the source code that explains that
> __blk_mq_get_tag() does not restrict tag allocation if dd->async_depth
> is zero because that causes data->shallow_depth to be zero.
> 

Ok.

Thanks,
Kuai

> Thanks,
> 
> Bart.
> .
>