linux-kernel - Re: [PATCH RFC v2 1/6] blk-throttle: remove CONFIG_BLK_DEV_THROTTLING

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Message-ID: <9edb4ff7-0094-d2b1-28e5-70daeb8b899c@huaweicloud.com>
Date: Sat, 13 Apr 2024 09:57:24 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: Tejun Heo <tj@...nel.org>, Yu Kuai <yukuai1@...weicloud.com>
Cc: axboe@...nel.dk, chenhuacai@...nel.org, josef@...icpanda.com,
 jhs@...atatu.com, svenjoac@....de, raven@...maw.net, pctammela@...atatu.com,
 qde@...cy.de, zhaotianrui@...ngson.cn, linux-block@...r.kernel.org,
 linux-kernel@...r.kernel.org, loongarch@...ts.linux.dev,
 cgroups@...r.kernel.org, yi.zhang@...wei.com, yangerkun@...wei.com,
 "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH RFC v2 1/6] blk-throttle: remove
 CONFIG_BLK_DEV_THROTTLING_LOW

Hi,

在 2024/04/13 1:30, Tejun Heo 写道:
> On Sat, Apr 06, 2024 at 04:00:54PM +0800, Yu Kuai wrote:
>> From: Yu Kuai <yukuai3@...wei.com>
>>
>> One the one hand, it's marked EXPERIMENTAL since 2017, and looks like
>> there are no users since then, and no testers and no developers, it's
>> just not active at all.
>>
>> On the other hand, even if the config is disabled, there are still many
>> fields in throtl_grp and throtl_data and many functions that are only
>> used for throtl low.
>>
>> At last, currently blk-throtl is initialized during disk initialization,
>> and destroyed during disk removal, and it exposes many functions to be
>> called directly from block layer. Hence I'm planning to optimize
>> blk-throtl and finially support building it as kernel module. Remove
>> throtl low will make the work much easier.
>>
>> Signed-off-by: Yu Kuai <yukuai3@...wei.com>
> 
> Acked-by: Tejun Heo <tj@...nel.org>
> 
> I haven't seen any usage but let's see if anyone complains.

Thanks for the review!
Kuai

> 
> Thanks.
>