linux-kernel - Re: [PATCH v2] sched: Fix psi

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Message-ID: <CANDhNCr8zTOOpWXh9oUqcY4N08f-5k6o67_CT2hUVeHKf_tTZA@mail.gmail.com>
Date: Thu, 4 Dec 2025 17:17:21 -0800
From: John Stultz <jstultz@...gle.com>
To: Haiyue Wang <haiyuewa@....com>
Cc: LKML <linux-kernel@...r.kernel.org>, K Prateek Nayak <kprateek.nayak@....com>, 
	Johannes Weiner <hannes@...xchg.org>, Joel Fernandes <joelagnelf@...dia.com>, 
	Qais Yousef <qyousef@...alina.io>, Ingo Molnar <mingo@...hat.com>, 
	Peter Zijlstra <peterz@...radead.org>, Juri Lelli <juri.lelli@...hat.com>, 
	Vincent Guittot <vincent.guittot@...aro.org>, Dietmar Eggemann <dietmar.eggemann@....com>, 
	Valentin Schneider <vschneid@...hat.com>, Suren Baghdasaryan <surenb@...gle.com>, 
	Steven Rostedt <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>, 
	Zimuzo Ezeozue <zezeozue@...gle.com>, Mel Gorman <mgorman@...e.de>, Will Deacon <will@...nel.org>, 
	Waiman Long <longman@...hat.com>, Boqun Feng <boqun.feng@...il.com>, 
	"Paul E. McKenney" <paulmck@...nel.org>, Metin Kaya <Metin.Kaya@....com>, 
	Xuewen Yan <xuewen.yan94@...il.com>, Thomas Gleixner <tglx@...utronix.de>, 
	Daniel Lezcano <daniel.lezcano@...aro.org>, Suleiman Souhlal <suleiman@...gle.com>, 
	kuyo chang <kuyo.chang@...iatek.com>, hupu <hupu.gm@...il.com>, kernel-team@...roid.com
Subject: Re: [PATCH v2] sched: Fix psi_dequeue for Proxy Execution

On Fri, Nov 28, 2025 at 1:35 AM Haiyue Wang <haiyuewa@....com> wrote:
>
>
> On 11/22/2025 3:01 AM, John Stultz wrote:
> > Currently, if the sleep flag is set, psi_dequeue() doesn't
> > change any of the psi_flags.
> >
> > This is because psi_switch_task() will clear TSK_ONCPU as well
>
> psi_task_switch()
>
>
> Tested-by: Haiyue Wang <haiyuewa@....com>

Thanks for the testing and the sharp eye on that detail!

I'll fix up and resend shortly here.

thanks
-john