T. Eichstädt
2009-Oct-23 22:02 UTC
[Xen-users] [PATCH] RHEL/CentOS 5, Xen 3.4.1 and Power Management
Dear all,
Hypervisor-based PM is not working under CentOS 5 with its original kernel.
I had some difficulties to get at least Domain0 based cpufreq working
under the CentOS 5 Kernel and Xen 3.4.1. There are problems with the
detection of the corrrect Processor ID because the interface of Xen
changed a little bit.
With the following patch power management in the combination of CentOS 5
Kernel and Xen 3.4.1 is working again (It is mainly a revert of
http://xen.markmail.org/message/ptnjmjaobb3bsutp?q=cpu_id.phys_id).
Hope somebody finds this useful.
Best regards
Thimo Eichstädt
!!! ATTENTION, PATCH IS ONLY MEANT TO GET PM WORKING WITH CENTOS 5
KERNEL !!!
diff -uNr xen-3.4.1.orig/xen/arch/x86/domain.c
xen-3.4.1/xen/arch/x86/domain.c
--- xen-3.4.1.orig/xen/arch/x86/domain.c 2009-08-06
15:57:27.000000000 +0200
+++ xen-3.4.1/xen/arch/x86/domain.c 2009-09-07 22:15:33.000000000 +0200
@@ -911,9 +911,8 @@
if ( !v->domain->is_pinned )
break;
- cpu_id.phys_id - (uint64_t)x86_cpu_to_apicid[v->vcpu_id]
|
- ((uint64_t)acpi_get_processor_id(v->vcpu_id) << 32);
+ cpu_id.phys_id = (x86_cpu_to_apicid[v->vcpu_id] |
+ (acpi_get_processor_id(v->vcpu_id) << 8));
rc = -EFAULT;
if ( copy_to_guest(arg, &cpu_id, 1) )
diff -uNr xen-3.4.1.orig/xen/common/domain.c xen-3.4.1/xen/common/domain.c
--- xen-3.4.1.orig/xen/common/domain.c 2009-08-06 15:57:27.000000000 +0200
+++ xen-3.4.1/xen/common/domain.c 2009-09-07 22:14:13.000000000 +0200
@@ -41,7 +41,7 @@
boolean_param("dom0_vcpus_pin", opt_dom0_vcpus_pin);
/* set xen as default cpufreq */
-enum cpufreq_controller cpufreq_controller = FREQCTL_xen;
+enum cpufreq_controller cpufreq_controller = FREQCTL_dom0_kernel;
static void __init setup_cpufreq_option(char *str)
{
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Stephen Spector
2009-Oct-23 23:57 UTC
[Xen-devel] RE: [Xen-users] [PATCH] RHEL/CentOS 5, Xen 3.4.1 and Power Management
Forwarded to xen-devel mailing list for review. Thanks for the Patch.
Stephen Spector
-----Original Message-----
From: xen-users-bounces@lists.xensource.com
[mailto:xen-users-bounces@lists.xensource.com] On Behalf Of "T.
Eichstädt"
Sent: Friday, October 23, 2009 6:03 PM
To: xen-users@lists.xensource.com
Subject: [Xen-users] [PATCH] RHEL/CentOS 5, Xen 3.4.1 and Power Management
Dear all,
Hypervisor-based PM is not working under CentOS 5 with its original kernel.
I had some difficulties to get at least Domain0 based cpufreq working
under the CentOS 5 Kernel and Xen 3.4.1. There are problems with the
detection of the corrrect Processor ID because the interface of Xen
changed a little bit.
With the following patch power management in the combination of CentOS 5
Kernel and Xen 3.4.1 is working again (It is mainly a revert of
http://xen.markmail.org/message/ptnjmjaobb3bsutp?q=cpu_id.phys_id).
Hope somebody finds this useful.
Best regards
Thimo Eichstädt
!!! ATTENTION, PATCH IS ONLY MEANT TO GET PM WORKING WITH CENTOS 5
KERNEL !!!
diff -uNr xen-3.4.1.orig/xen/arch/x86/domain.c
xen-3.4.1/xen/arch/x86/domain.c
--- xen-3.4.1.orig/xen/arch/x86/domain.c 2009-08-06
15:57:27.000000000 +0200
+++ xen-3.4.1/xen/arch/x86/domain.c 2009-09-07 22:15:33.000000000 +0200
@@ -911,9 +911,8 @@
if ( !v->domain->is_pinned )
break;
- cpu_id.phys_id - (uint64_t)x86_cpu_to_apicid[v->vcpu_id]
|
- ((uint64_t)acpi_get_processor_id(v->vcpu_id) << 32);
+ cpu_id.phys_id = (x86_cpu_to_apicid[v->vcpu_id] |
+ (acpi_get_processor_id(v->vcpu_id) << 8));
rc = -EFAULT;
if ( copy_to_guest(arg, &cpu_id, 1) )
diff -uNr xen-3.4.1.orig/xen/common/domain.c xen-3.4.1/xen/common/domain.c
--- xen-3.4.1.orig/xen/common/domain.c 2009-08-06 15:57:27.000000000 +0200
+++ xen-3.4.1/xen/common/domain.c 2009-09-07 22:14:13.000000000 +0200
@@ -41,7 +41,7 @@
boolean_param("dom0_vcpus_pin", opt_dom0_vcpus_pin);
/* set xen as default cpufreq */
-enum cpufreq_controller cpufreq_controller = FREQCTL_xen;
+enum cpufreq_controller cpufreq_controller = FREQCTL_dom0_kernel;
static void __init setup_cpufreq_option(char *str)
{
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