linux-kernel - Re: [PATCH] blk-iocost: combine local_stat and desc

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Date:   Tue, 10 May 2022 08:25:50 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Chengming Zhou <zhouchengming@...edance.com>
Cc:     axboe@...nel.dk, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, duanxiongchun@...edance.com,
        songmuchun@...edance.com
Subject: Re: [PATCH] blk-iocost: combine local_stat and desc_stat to stat

On Tue, May 10, 2022 at 11:47:57AM +0800, Chengming Zhou wrote:
> When we flush usage, wait, indebt stat in iocg_flush_stat(), we use
> local_stat and desc_stat, which has no point since the leaf iocg
> only has local_stat and the inner iocg only has desc_stat. Also
> we don't need to flush percpu abs_vusage for these inner iocgs.
> 
> This patch combine local_stat and desc_stat to stat, only flush
> percpu abs_vusage for active leaf iocgs, then build inner walk
> list to propagate.
> 
> Signed-off-by: Chengming Zhou <zhouchengming@...edance.com>

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

Thanks.

-- 
tejun