linux-kernel - Re: [PATCH v2 1/2] block: Introduce nr_sched

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Message-ID: <da0fe451-c036-cd18-7eb2-55c51c104ab5@acm.org>
Date:   Fri, 22 Jul 2022 10:35:37 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Wang You <wangyoua@...ontech.com>, axboe@...nel.dk
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        hch@....de, jaegeuk@...nel.org, fio@...r.kernel.org,
        ming.lei@...hat.com, wangxiaohua@...ontech.com
Subject: Re: [PATCH v2 1/2] block: Introduce nr_sched_batch sys interface

On 7/22/22 02:51, Wang You wrote:
> The function of this patch is to add an nr_sched_batch interface under
> /sys/block/sdx/queue/, which can be used to set the number of batching
> requests. Of course, the default value is nr_requests and will follow
> nr_request when it has not been changed.

Do we need this new parameter? How does the performance of reducing 
nr_requests compare to configuring nr_sched_batch?

Thanks,

Bart.