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Date: Fri, 24 Jun 2016 10:08:52 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Jirka Hladky <jhladky@redhat.com>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
        Kamil Kolakowski <kkolakow@redhat.com>
Subject: Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and
 SPECjvm2008 benchmarks against 4.6 kernel
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On Fri, Jun 24, 2016 at 09:44:41AM +0200, Jirka Hladky wrote:
> I have double checked default settings and
> 
> kernel.sched_autogroup_enabled
> 
> is by default ON both in 4.6 and 4.7 kernel.

Yeah, if you enable that CONFIG its default enabled. In any case, I'll
go trawl through the cgroup code now. I spend yesterday looking at the
'wrong' part things.