linux-kernel - Re: [PATCH 2/2] blk-throttle: only enable blk-stat when BLK_DEV_THROTTLING

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Message-ID: <ZDbnDGtoY3q_ow-R@slm.duckdns.org>
Date:   Wed, 12 Apr 2023 07:14:52 -1000
From:   Tejun Heo <tj@...nel.org>
To:     chengming.zhou@...ux.dev
Cc:     axboe@...nel.dk, josef@...icpanda.com, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
        Chengming Zhou <zhouchengming@...edance.com>
Subject: Re: [PATCH 2/2] blk-throttle: only enable blk-stat when
 BLK_DEV_THROTTLING_LOW

On Thu, Apr 13, 2023 at 12:07:54AM +0800, chengming.zhou@...ux.dev wrote:
> From: Chengming Zhou <zhouchengming@...edance.com>
> 
> blk_throtl_register() will unconditionally enable blk-stat for gendisk
> when register, even when we have no BLK_DEV_THROTTLING_LOW config.
> 
> Since the kernel always has only BLK_DEV_THROTTLING config and the
> BLK_DEV_THROTTLING_LOW config is still in EXPERIMENTAL state, we can
> just skip blk-stat when !BLK_DEV_THROTTLING_LOW.
> 
> Signed-off-by: Chengming Zhou <zhouchengming@...edance.com>

Acked-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun