linux-kernel - Re: Scheduler regression from caffcdd8d27ba78730d5540396ce72ad022aff2c

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Message-ID: <20140722132603.GL12054@laptop.lan>
Date:	Tue, 22 Jul 2014 15:26:03 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Bruno Wolff III <bruno@...ff.to>
Cc:	Dietmar Eggemann <dietmar.eggemann@....com>,
	Josh Boyer <jwboyer@...hat.com>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: Scheduler regression from
 caffcdd8d27ba78730d5540396ce72ad022aff2c

On Tue, Jul 22, 2014 at 03:03:43PM +0200, Peter Zijlstra wrote:
> Oh, of course we do SMP detection and setup after the cache setup...
> lovely.
> 
> /me goes bang head against wall

hpa, could we move the legacy cpuid1/cpuid4 topology detection muck up,
preferably right after detect_extended_topology()?

I need c->phys_proc_id in init_intel_cacheinfo() for machines with
cpuid_level < 4.
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