linux-kernel - Re: [patch] sched/autogroup: Fix 64bit kernel nice adjustment

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Date:   Wed, 23 Nov 2016 15:12:21 +0100
From:   Mike Galbraith <efault@....de>
To:     "Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>
Cc:     Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Ingo Molnar <mingo@...nel.org>,
        linux-man <linux-man@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [patch] sched/autogroup: Fix 64bit kernel nice adjustment

On Wed, 2016-11-23 at 14:47 +0100, Michael Kerrisk (man-pages) wrote:
> Hello Mike,
> 
> On 11/23/2016 11:33 AM, Mike Galbraith wrote:
> > On Tue, 2016-11-22 at 16:59 +0100, Michael Kerrisk (man-pages)
> > wrote:
> > 
> > >        ┌─────────────────────────────────────────────────────┐
> > >        │FIXME                                                │
> > >        ├─────────────────────────────────────────────────────┤
> > >        │Regarding the previous paragraph...  My tests  indi‐ │
> > >        │cate  that writing *any* value to the autogroup file │
> > >        │causes the task group to get a lower priority.  This │
> > 
> > Because autogroup didn't call the then meaningless scale_load()...
> 
> So, does that mean that this buglet kicked in starting (only) in 
> Linux 4.7 with commit 2159197d66770ec01f75c93fb11dc66df81fd45b?

Yeah, that gave it teeth.

	-Mike