linux-kernel - Re: Scheduler regression from caffcdd8d27ba78730d5540396ce72ad022aff2c

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Date:	Tue, 22 Jul 2014 10:05:13 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Peter Zijlstra <peterz@...radead.org>,
	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>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: Scheduler regression from caffcdd8d27ba78730d5540396ce72ad022aff2c

On 07/22/2014 06:35 AM, Peter Zijlstra wrote:
> On Tue, Jul 22, 2014 at 03:26:03PM +0200, Peter Zijlstra wrote:
>> 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.
> 
> Something like so.. anything obviously broken?
> 

Nothing *obvious*.  I should stare a pass at the code.

	-hpa


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