linux-kernel - Re: [PATCH RFC v2 5/6] blk-throttle: support to destroy throtl

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Date: Fri, 12 Apr 2024 08:05:34 -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 5/6] blk-throttle: support to destroy throtl_data
 when blk-throttle is disabled

Hello,

On Sat, Apr 06, 2024 at 04:00:58PM +0800, Yu Kuai wrote:
> From: Yu Kuai <yukuai3@...wei.com>
> 
> Currently once blk-throttle is enabled, it can't be destroyed until disk
> removal, even it's disabled.
> 
> Also prepare to support building it as kernel module.

The benefit of doing this whenever the ruleset becomes empty seems marginal.
This isn't necessary to allow unloading blk-throttle and
blkg_conf_exit_blkg() is also necessary because of this, right?

Thanks.

-- 
tejun