linux-kernel - Re: [PATCH v1] sched/uclamp: Exclude kernel threads from uclamp logic

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Message-ID: <675563a5-8f1d-4249-9828-9fb353dd7dd1@arm.com>
Date: Thu, 3 Jul 2025 10:22:41 +0100
From: Christian Loehle <christian.loehle@....com>
To: Zihuan Zhang <zhangzihuan@...inos.cn>, xuewen.yan@...soc.com,
 vincent.guittot@...aro.org, mingo@...hat.com, peterz@...radead.org,
 juri.lelli@...hat.com
Cc: rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
 vschneid@...hat.com, hongyan.xia2@....com, linux-kernel@...r.kernel.org,
 ke.wang@...soc.com, di.shen@...soc.com, xuewen.yan94@...il.com,
 kprateek.nayak@....com, kuyo.chang@...iatek.com, juju.sung@...iatek.com,
 qyousef@...alina.io
Subject: Re: [PATCH v1] sched/uclamp: Exclude kernel threads from uclamp logic

On 7/3/25 10:14, Zihuan Zhang wrote:
> Kernel threads (PF_KTHREAD) are not subject to user-defined utilization
> clamping. They do not represent user workloads and should not participate
> in any uclamp logic, including:

Why not?

> [snip]