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

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Message-ID: <34cea28b-c8c7-31e3-e920-90f113d22abe@gmail.com>
Date:   Wed, 23 Nov 2016 15:20:38 +0100
From:   "Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>
To:     Mike Galbraith <efault@....de>
Cc:     mtk.manpages@...il.com, 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 11/23/2016 03:12 PM, Mike Galbraith wrote:
> 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.

Thanks for the confirmation. Are you aiming to see the fix 
merged for 4.9, or will this wait for 4.10?

Cheers,

Michael



-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/