linux-kernel - Re: [PATCH] sched/cpuset/pm: Fix cpuset vs suspend-resume

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Message-ID: <20170907203808.GU1774378@devbig577.frc2.facebook.com>
Date:   Thu, 7 Sep 2017 13:38:08 -0700
From:   Tejun Heo <tj@...nel.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Mike Galbraith <efault@....de>,
        Andy Lutomirski <luto@...capital.net>,
        Andy Lutomirski <luto@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] sched/cpuset/pm: Fix cpuset vs suspend-resume

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@...nel.org>

Thanks!

-- 
tejun