Re: [PATCH v5 RESEND 3/5] dm-bufio: Support I/O priority

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To: Hongyu Jin <hongyu.jin.cn@xxxxxxxxx>
Subject: Re: [PATCH v5 RESEND 3/5] dm-bufio: Support I/O priority
From: Eric Biggers <ebiggers@xxxxxxxxxx>
Date: Tue, 19 Dec 2023 15:46:26 -0700
Cc: agk@xxxxxxxxxx, snitzer@xxxxxxxxxx, mpatocka@xxxxxxxxxx, axboe@xxxxxxxxx, zhiguo.niu@xxxxxxxxxx, ke.wang@xxxxxxxxxx, yibin.ding@xxxxxxxxxx, hongyu.jin@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, dm-devel@xxxxxxxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx
In-reply-to: <20231218012746.24442-4-hongyu.jin.cn@gmail.com>
References: <CAMQnb4O15c=JC-zkCJD0U9GWwWko+Hez1iU7+cc3vhNSG86p9w@mail.gmail.com> <20231218012746.24442-1-hongyu.jin.cn@gmail.com> <20231218012746.24442-4-hongyu.jin.cn@gmail.com>

On Mon, Dec 18, 2023 at 09:27:44AM +0800, Hongyu Jin wrote:
> From: Hongyu Jin <hongyu.jin@xxxxxxxxxx>
> 
> Add I/O priority parameter for dm_bufio_read() and
> dm_bufio_prefetch().

Needs an explanation for why this is useful.

- Eric

References:
- Re: [PATCH v5 1/5] block: Fix bio IO priority setting
  - From: Henry King
- [PATCH v5 RESEND 0/5] Fix I/O priority lost in device-mapper
  - From: Hongyu Jin
- [PATCH v5 RESEND 3/5] dm-bufio: Support I/O priority
  - From: Hongyu Jin

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