linux-kernel - Re: [PATCHv3 1/1] block: introduce content activity based ioprio

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Message-ID: <15d07953-aeff-460e-81fe-ea7fc2f6145d@kernel.org>
Date: Thu, 25 Jan 2024 18:54:28 +0900
From: Damien Le Moal <dlemoal@...nel.org>
To: Zhaoyang Huang <huangzhaoyang@...il.com>
Cc: "zhaoyang.huang" <zhaoyang.huang@...soc.com>,
 Andrew Morton <akpm@...ux-foundation.org>, Jens Axboe <axboe@...nel.dk>,
 Yu Zhao <yuzhao@...gle.com>, Niklas Cassel <niklas.cassel@....com>,
 "Martin K . Petersen" <martin.petersen@...cle.com>,
 Hannes Reinecke <hare@...e.de>, Linus Walleij <linus.walleij@...aro.org>,
 linux-mm@...ck.org, linux-block@...r.kernel.org,
 linux-kernel@...r.kernel.org, steve.kang@...soc.com
Subject: Re: [PATCHv3 1/1] block: introduce content activity based ioprio

On 1/25/24 18:37, Zhaoyang Huang wrote:
> Actually, the activity information comes from page's history (recorded
> at page cache's slot) instead of user space in step(1) and can be
> associate with bio in step(2) or iterate the bio in step(3)
> page fault(or vfs)(1)
> |
> alloc_pages
> |
> add_page_to_pagecache(get the page's activity information)
> |
> fs_readpage
> |
> bio_add_page(2)
> |

set your prio here. No change to the block layer needed. That is FS land.

> submit_bio(3)

-- 
Damien Le Moal
Western Digital Research