linux-kernel - Re: [RESEND][PATCH v21 0/6] Donor Migration for Proxy Execution (v21)

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Message-ID: <CANDhNCp8Nrvoy_-xwWOk_7XM3PmGiKJPc6Rh8bGqhnu+dwF1gw@mail.gmail.com>
Date: Mon, 15 Sep 2025 21:57:32 -0700
From: John Stultz <jstultz@...gle.com>
To: K Prateek Nayak <kprateek.nayak@....com>
Cc: LKML <linux-kernel@...r.kernel.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>, 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: [RESEND][PATCH v21 0/6] Donor Migration for Proxy Execution (v21)

On Mon, Sep 15, 2025 at 8:19 PM K Prateek Nayak <kprateek.nayak@....com> wrote:
>
> Hello John,
>
> On 9/4/2025 5:51 AM, John Stultz wrote:
> > Also you can find the full proxy-exec series here:
> >   https://github.com/johnstultz-work/linux-dev/commits/proxy-exec-v21-6.17-rc4/
> >   https://github.com/johnstultz-work/linux-dev.git proxy-exec-v21-6.17-rc4
>
> tl;dr
>
> This series seems fine from performance standpoint but the above branch
> may have some performance issues but take them with a grain of salt
> since this is not all apples to apples comparison.
>

Thank you so much for running these test! I really appreciate it!
It does look like I need to  spend some more work on the full series,
as those regressions with the full proxy patch set does seem
problematic. Thank  you for raising this!

(Thank you also for your feedback on the patches in this series, I've
not gotten a chance to address and reply back individually yet, but I
hope to do so soon!)


> For this series things are alright - my harness for longer running
> benchmarks gave up for some reason so I'll rerun those tests again and
> report back later but either tip has some improvements for
> netperf / tbench or "proxy-exec-v21-6.17-rc4" may have some issues
> around it. I'll take a deeper look later in the week.
>

Let me know if you find anything further!

Thank you so much again for all your efforts here, both in testing and
review! As well as the testing you do for the whole community!
-john