linux-kernel - Re: [PATCH v19 0/8] Single RunQueue Proxy Execution (v19)

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Message-ID: <CANDhNCpKD7Ttygy9wGM429JYK86r70E6XGToPBVE2YrObKRHdg@mail.gmail.com>
Date: Mon, 14 Jul 2025 16:39:09 -0700
From: John Stultz <jstultz@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: LKML <linux-kernel@...r.kernel.org>, Joel Fernandes <joelagnelf@...dia.com>, 
	Qais Yousef <qyousef@...alina.io>, Ingo Molnar <mingo@...hat.com>, 
	Juri Lelli <juri.lelli@...hat.com>, Vincent Guittot <vincent.guittot@...aro.org>, 
	Dietmar Eggemann <dietmar.eggemann@....com>, Valentin Schneider <vschneid@...hat.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>, K Prateek Nayak <kprateek.nayak@....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 v19 0/8] Single RunQueue Proxy Execution (v19)

On Mon, Jul 14, 2025 at 4:52 AM Peter Zijlstra <peterz@...radead.org> wrote:
>
> On Sat, Jul 12, 2025 at 03:33:41AM +0000, John Stultz wrote:
> > Hey All,
> >
> > This is just a quick update to the v18 series, to address some
> > smaller nits Peter had as well as a few build issues uncovered
> > with !SMP and PREEMPT_RT that K Prateek Nayak highlighted.
> >
> > So here is v19 of the Proxy Execution series, a generalized form
> > of priority inheritance.
>
> I've queued this up in queue.git/sched/core; I had to stomp on it a little
> because recent other patches made conflicts. I think I did it right, but
> please double check! :-)

Awesome!  Looks ok so far(and seeing CONFIG_SMP removal from -tip is
exciting, as that will simplify logic and reduce build testing, as
issues there have often bitten me).

I'm running stress tests w/ your branch now and will leave it going
for a few days, just to be sure.

Thanks so much again for all the review and feedback! Really happy to
have this progress made, and I'll get the proxy-migration portion of
the full series ready to send out next.
-john