linux-kernel - Re: [PATCH 10/10] sched/fair: Implement an EEVDF like policy

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Message-ID: <20230309090633.GK2017917@hirez.programming.kicks-ass.net>
Date:   Thu, 9 Mar 2023 10:06:33 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Mike Galbraith <efault@....de>
Cc:     mingo@...nel.org, vincent.guittot@...aro.org,
        linux-kernel@...r.kernel.org, juri.lelli@...hat.com,
        dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
        mgorman@...e.de, bristot@...hat.com, corbet@....net,
        qyousef@...alina.io, chris.hyser@...cle.com,
        patrick.bellasi@...bug.net, pjt@...gle.com, pavel@....cz,
        qperret@...gle.com, tim.c.chen@...ux.intel.com, joshdon@...gle.com,
        timj@....org, kprateek.nayak@....com, yu.c.chen@...el.com,
        youssefesmat@...omium.org, joel@...lfernandes.org
Subject: Re: [PATCH 10/10] sched/fair: Implement an EEVDF like policy

Hi Mike!

On Wed, Mar 08, 2023 at 02:36:01PM +0100, Mike Galbraith wrote:
> On Wed, 2023-03-08 at 09:39 +0100, Mike Galbraith wrote:
> >
> > Curiosity got the best of me...
> 
> Remember this little bugger, allegedly distilled from a real
> application control thread starvation issue?

Oooh, yeah, I should still have that somewhere. I'll try and remember
what exactly was needed to make it behave properly.

Thanks for your feedback. I'll go prod at things a bit more. Like I
wrote, the code is more or less at the point where it stopped crashing
and doing obviously bad things. It definitely needs a more attention.