linux-kernel - Re: [patch] Mark rdtsc as sync only for netburst, not for core2

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Date:	Wed, 29 Nov 2006 17:07:48 +0800
From:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
To:	Arjan van de Ven <arjan@...ux.intel.com>
Cc:	Andi Kleen <ak@...e.de>, linux-kernel@...r.kernel.org,
	akpm@...l.org
Subject: Re: [patch] Mark rdtsc as sync only for netburst, not for core2

On Wed, 2006-11-29 at 09:35 +0100, Arjan van de Ven wrote:
> Zhang, Yanmin wrote:
> >> but second of all, the core2 cpus are dual core so.. .what does it 
> >> bring you at all?
> > 
> > When there is only one cpu (or UP), the go backwards issue doesn't exist,
> 
> it does exist for single-socket dual core already. And core2 is dual 
> core...
> 
> > so
> > don't use cpuid here for UP. Another function init_amd already does so.
> > 
> not anymore.. that got fixed very recently...
Thanks.

> (but you are right; on AMD the speculation is even bigger so there 
> even on single core you need cpuid)
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