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

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Message-ID: <20110518210754.GA28476@elte.hu>
Date:	Wed, 18 May 2011 23:07:54 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Rao, Nikhil" <nikhil.rao@...el.com>
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


* 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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