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From: Tejun Heo <tj@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>,
	Andy Lutomirski <luto@amacapital.net>,
	Andy Lutomirski <luto@kernel.org>, Ingo Molnar <mingo@kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH] sched/cpuset/pm: Fix cpuset vs suspend-resume
Date: Thu, 7 Sep 2017 13:38:08 -0700
Message-ID: <20170907203808.GU1774378@devbig577.frc2.facebook.com> (raw)
In-Reply-To: <20170907092616.thsuyqklit4463wj@hirez.programming.kicks-ass.net>

Hello,

On Thu, Sep 07, 2017 at 11:26:16AM +0200, Peter Zijlstra wrote:
> TJ, I _think_ it was commit:
> 
>   deb7aa308ea2 ("cpuset: reorganize CPU / memory hotplug handling")

Heh, that's a while ago.

> That wrecked things, but there's been so much changes in this area it is
> really hard to tell. Note how before that commit it would
> unconditionally rebuild the domains, and you 'optimized' that ;-)
> 
> That commit also introduced the work to do the async rebuild and failed
> to do that flush on resume.
>
> In any case, I think we should put a fixes tag on this commit such that
> it gets picked up into stable kernels. Not sure anybody will try and
> backport it into 4 year old kernels, but who knows.

I see & sounds good to me.  I see that the patch already got applied
but FWIW,

 Acked-by: Tejun Heo <tj@kernel.org>

Thanks!

-- 
tejun

  parent reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-09-06  5:13 Abysmal scheduler performance in Linus' tree? Andy Lutomirski
2017-09-06  8:25 ` Peter Zijlstra
2017-09-06  8:59   ` Andy Lutomirski
2017-09-06  9:03     ` Peter Zijlstra
2017-09-06 16:14       ` Peter Zijlstra
2017-09-07  6:15         ` Mike Galbraith
2017-09-07  7:31           ` Ingo Molnar
2017-09-07  9:13           ` [PATCH] sched/cpuset/pm: Fix cpuset vs suspend-resume Peter Zijlstra
2017-09-07  9:26             ` Peter Zijlstra
2017-09-07 10:54               ` Rafael J. Wysocki
2017-09-07 20:38               ` Tejun Heo [this message]
2017-09-07 10:33             ` [tip:sched/urgent] sched/cpuset/pm: Fix cpuset vs. suspend-resume bugs tip-bot for Peter Zijlstra
2017-09-06  9:15 ` Abysmal scheduler performance in Linus' tree? Chris Wilson
2017-09-06  9:24   ` Peter Zijlstra
     [not found]     ` <150469312649.28581.17626550155735691534@mail.alporthouse.com>
2017-09-06 10:44       ` Peter Zijlstra
2017-09-06 10:51         ` Peter Zijlstra
2017-09-07  8:16           ` [tip:sched/urgent] sched/fair: Fix wake_affine_llc() balancing rules tip-bot for Peter Zijlstra

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