linux-kernel - Re: [PATCH 4/4] sched/topology: the group balance cpu must be a cpu where the group is installed

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Message-ID: <20170425152236.pyajqlh7spasgldk@hirez.programming.kicks-ass.net>
Date:   Tue, 25 Apr 2017 17:22:36 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Lauro Venancio <lvenanci@...hat.com>
Cc:     lwang@...hat.com, riel@...hat.com, Mike Galbraith <efault@....de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] sched/topology: the group balance cpu must be a cpu
 where the group is installed

On Tue, Apr 25, 2017 at 05:12:00PM +0200, Peter Zijlstra wrote:
> But I'll first try and figure out why I'm not having empty masks.

Ah, so this is before all the degenerate stuff, so there's a bunch of
redundant domains below that make it work -- and there always will be,
unless FORCE_SD_OVERLAP.

Now I wonder what triggered it.. let me put it back.