linux-kernel - Re: [PATCH] docs: Fix blk-iolatency peer throttling description

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Message-ID: <guqq2cm3mk5qf45rcman3twiu7vax4sgkrhj23jrjb26tt3sk3@bh2h6s7givfq>
Date: Tue, 20 Jan 2026 14:37:45 +0100
From: Michal Koutný <mkoutny@...e.com>
To: Tang Yizhou <yizhou.tang@...pee.com>
Cc: tj@...nel.org, corbet@....net, axboe@...nel.dk, hch@....de, 
	cgroups@...r.kernel.org, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] docs: Fix blk-iolatency peer throttling description

On Wed, Jan 14, 2026 at 07:08:37PM +0800, Tang Yizhou <yizhou.tang@...pee.com> wrote:
> From: Tang Yizhou <yizhou.tang@...pee.com>
> 
> The current text states that peers with a lower latency target are
> throttled, which is the opposite of the actual behavior. In fact,
> blk-iolatency throttles peer groups with a higher latency target in order
> to protect the more latency-sensitive group.
> 
> In addition, peer groups without a configured latency target are also
> throttled, as they are treated as lower priority compared to groups with
> explicit latency requirements.
> 
> Update the documentation to reflect the correct throttling behavior.
> 
> Signed-off-by: Tang Yizhou <yizhou.tang@...pee.com>
> ---
>  Documentation/admin-guide/cgroup-v2.rst | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)

Not a big deal but it could've been confusing.


Acked-by: Michal Koutný <mkoutny@...e.com>

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