Re: [PATCH] Docs/admin-guide/cgroup-v2: document hierarchical cpu.max throttling behavior

Michal Koutný <[email protected]> Fri, 24 Jul 2026 13:21:46 +0200

Newsgroups	org.kernel.vger.cgroups,org.kernel.vger.linux-doc,org.kernel.vger.linux-kernel
Message-ID	<[email protected]>

Hi.

On Fri, Jul 24, 2026 at 06:25:00PM +0800, Shaojie Sun <[email protected]> wrote:
> diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
> index 14b8c571c0d1..3572d3e7f688 100644
> --- a/Documentation/admin-guide/cgroup-v2.rst
> +++ b/Documentation/admin-guide/cgroup-v2.rst

> +	                                       and the resulting
> +	throttling may reflect the combined effect of multiple levels
> +	rather than any single level's limit alone (this differs from
> +	other Limits-type controllers such as memory.max and io.max,
> +	where the most restrictive limit along the hierarchy is
> +	applied).

I'm not sure from the description what the "combined effect" is.
Can you give an example where the cpu.max differs from that Limits-type
semantics?

Thanks,
Michal

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