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

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Message-ID: <ZhlvqqtSo_Aw2Hjo@slm.duckdns.org>
Date: Fri, 12 Apr 2024 07:30:18 -1000
From: Tejun Heo <tj@...nel.org>
To: 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, yukuai3@...wei.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
Subject: Re: [PATCH RFC v2 1/6] blk-throttle: remove
 CONFIG_BLK_DEV_THROTTLING_LOW

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.

-- 
tejun