linux-kernel - Re: [PATCH] blk-throttle: Fix io statistics for cgroup v1

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Message-ID: <ZCSJaBO8i5jQFC10@slm.duckdns.org>
Date:   Wed, 29 Mar 2023 08:54:32 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Jinke Han <hanjinke.666@...edance.com>
Cc:     josef@...icpanda.com, axboe@...nel.dk, cgroups@...r.kernel.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] blk-throttle: Fix io statistics for cgroup v1

On Tue, Mar 28, 2023 at 10:23:09PM +0800, Jinke Han wrote:
> From: Jinke Han <hanjinke.666@...edance.com>
> 
> Now the io statistics of cgroup v1 are no longer accurate. Although
> in the long run it's best that rstat is a good implementation of
> cgroup v1 io statistics. But before that, we'd better fix this issue.

Can you please expand on how the stats are wrong on v1 and how the patch
fixes it?

Thanks.

-- 
tejun