WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

RE: [Xen-devel] 2.6.31.6 pv_ops with K8 cpufreq

To: "'xen-devel@xxxxxxxxxxxxxxxxxxx'" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] 2.6.31.6 pv_ops with K8 cpufreq
From: "Langsdorf, Mark" <mark.langsdorf@xxxxxxx>
Date: Mon, 8 Feb 2010 06:32:45 -0800
Accept-language: en-US
Acceptlanguage: en-US
Delivery-date: Mon, 08 Feb 2010 06:33:15 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <4B6D9428.7080209@xxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <4B6D9428.7080209@xxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: AcqnRsmQ+AgQCqtsQMqY+RhN5vSatgBhF7UA
Thread-topic: [Xen-devel] 2.6.31.6 pv_ops with K8 cpufreq
> i've an Xen Server running on AMD K8 CPU.
> With Xen-3.4.0 and 2.6.24-24-xen Ubuntu Dom0 Kernel i can use 
> cpufreq via:
> cpufreq=dom0-kernel
> 
> But on 2.6.31.6 pv_ops Kernel i get:
> powernow-k8: Found 1 AMD Athlon(tm) 64 X2 Dual Core Processor 3800+
> processors (2 cpu cores) (version 2.20.00)
> [Firmware Bug]: powernow-k8: No compatible ACPI _PSS objects found.
> [Firmware Bug]: powernow-k8: Try again with latest BIOS.
> 
> I've installed latest BIOS.
> I've read that cpufreq=xen only work with K10.
> Is it so?

cpufreq=xen only works with Family 10h and later processors,
but that's not the problem you're having.

Your problem is that the pv_ops kernel is not finding the
_PSS objects that the 2.6.24 kernel is finding.

A lot of people are reporting this problem recently.  There
appears to be a code change in recent Linux kernels that
causes some BIOSes to stop providing the _PSS objects to
the Linux kernel.  I'm not sure if this is a broken BIOS
issue or a broken Linux issue but I am investigating it.

-Mark Langsdorf
Operating System Research Center
AMD

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

<Prev in Thread] Current Thread [Next in Thread>