linux-kernel - Re: [tip:sched/urgent] sched/fair: Clear ->h_load

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Message-ID: <CAKfTPtCQW_Oj+P6nGx0nVO01CahSEqxuToO8kg=oe3yfuViOwg@mail.gmail.com>
Date: Mon, 29 Dec 2025 14:58:16 +0100
From: Vincent Guittot <vincent.guittot@...aro.org>
To: Cruz Zhao <CruzZhao@...ux.alibaba.com>
Cc: tip-bot2@...utronix.de, linux-kernel@...r.kernel.org, 
	linux-tip-commits@...r.kernel.org, mingo@...nel.org, 
	peng_wang@...ux.alibaba.com, x86@...nel.org
Subject: Re: [tip:sched/urgent] sched/fair: Clear ->h_load_next when
 unregistering a cgroup

Hi Cruz,

On Mon, 29 Dec 2025 at 13:51, Cruz Zhao <CruzZhao@...ux.alibaba.com> wrote:
>
> Hi Ingo/Peter/all,
>
> I noticed that the following patch has been queued in the
> tip:sched/urgent branch for some time but hasn't yet made
> it into mainline:
> https://lore.kernel.org/all/176478073513.498.15089394378873483436.tip-bot2@tip-bot2/
>
> Could you please check if there's anything blocking its
> merge? I wanted to ensure it doesn’t get overlooked.

>From an off list discussion w/ Peter, we need to check that this patch
is not hiding the root cause that task_h_load is not called in the
right context i.e. with rcu_read_lock(). Peter pointed out one place
in numa [1]

[1] https://lore.kernel.org/all/20251015124422.GD3419281@noisy.programming.kicks-ass.net/

Vincent

>
> Thanks for your time and reviewing!
>
> Best regards,
> Cruz Zhao