From: Ingo Molnar <mingo@elte.hu>
To: Andreas Herrmann <herrmann.der.user@googlemail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org, Yinghai Lu <yinghai@kernel.org>
Subject: Re: x86, amd: Get multi-node CPU info from NodeId MSR instead of PCI config space
Date: Fri, 16 Oct 2009 15:00:00 +0200 [thread overview]
Message-ID: <20091016130000.GC24518@elte.hu> (raw)
In-Reply-To: <20091016125700.GD8387@alberich.amd.com>
* Andreas Herrmann <herrmann.der.user@googlemail.com> wrote:
> > are there any such CPUs?
>
> Only Magny-Cours so far.
>
> > I.e. we want to know the effect of this patch on various models of
> > AMD CPUs - is the change really .32 safe? Does it solve any problem
> > that makes it .32 material versus being for .33?
>
> IMHO getting rid of the PCI config space accesses as soon as possible
> is a benefit, I think.
Agreed.
Is the patch an identity transformation? Or are there CPUs where the
information from the PCI config space is different from the MSR derived
one?
Ingo
next prev parent reply other threads:[~2009-10-16 13:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-16 12:22 x86, amd: Get multi-node CPU info from NodeId MSR instead of PCI config space Andreas Herrmann
2009-10-16 12:38 ` Ingo Molnar
2009-10-16 12:57 ` Andreas Herrmann
2009-10-16 13:00 ` Ingo Molnar [this message]
2009-10-16 13:05 ` Andreas Herrmann
2009-10-27 9:33 ` [PATCH RESEND] " Andreas Herrmann
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