linux-kernel - RE: [PATCH] x86: Removing unnecessary check in detect

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Date:	Wed, 18 May 2011 21:13:19 +0000
From:	"Rao, Nikhil" <nikhil.rao@...el.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	"tglx@...utronix.de" <tglx@...utronix.de>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"hpa@...or.com" <hpa@...or.com>, "x86@...nel.org" <x86@...nel.org>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH]  x86: Removing unnecessary check in detect_ht

Nothing apart from what you mention - bootlog message and SMP instead of SMT.

Nikhil

> -----Original Message-----
> From: Ingo Molnar [mailto:mingo@...e.hu]
> Sent: Wednesday, May 18, 2011 2:08 PM
> To: Rao, Nikhil
> Cc: tglx@...utronix.de; mingo@...hat.com; hpa@...or.com;
> x86@...nel.org; Siddha, Suresh B; linux-kernel@...r.kernel.org
> Subject: Re: [PATCH] x86: Removing unnecessary check in detect_ht
> 
> 
> * Rao, Nikhil <nikhil.rao@...el.com> wrote:
> 
> > This patch removes a check that prevents correct CPU topology setup
> > when cpuid extensions for topology enumeration are not supported and
> > the number of processors reported to the OS is smaller than
> > smp_num_siblings
> 
> What bad effect was observed, exactly? An annoying warning in the
> bootlog and
> incorrect scheduler domain setup (SMP instead of SMT) - or something
> else as
> well?
> 
> Thanks,
> 
> 	Ingo
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