|
xen-devel
RE: [Xen-devel] [PATCH]ACPI: re-enable mwait for xen cpuidle
|
To: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
|
Subject: |
RE: [Xen-devel] [PATCH]ACPI: re-enable mwait for xen cpuidle |
|
From: |
"Wei, Gang" <gang.wei@xxxxxxxxx> |
|
Date: |
Fri, 2 Apr 2010 14:32:42 +0800 |
|
Accept-language: |
zh-CN, en-US |
|
Acceptlanguage: |
zh-CN, en-US |
|
Cc: |
Keir, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Fraser <keir.fraser@xxxxxxxxxxxxx>, "Yu, Ke" <ke.yu@xxxxxxxxx> |
|
Delivery-date: |
Thu, 01 Apr 2010 23:33:59 -0700 |
|
Envelope-to: |
www-data@xxxxxxxxxxxxxxxxxxx |
|
In-reply-to: |
<4BB58353.5000008@xxxxxxxx> |
|
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: |
<E6467867A6B05E4FA831B7DF29925F5C40E677DD@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx> <4BB58353.5000008@xxxxxxxx> |
|
Sender: |
xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
|
Thread-index: |
AcrSJwfP1cRYbKunSoq1Ihm8FHUCfgAA7V8Q |
|
Thread-topic: |
[Xen-devel] [PATCH]ACPI: re-enable mwait for xen cpuidle |
On Friday, 2010-4-2 1:41 PM, Jeremy Fitzhardinge wrote:
> On 04/01/2010 07:38 PM, Wei, Gang wrote:
>> I suggest including this patch in Xen 4.0 release. It is quite
>> straightforward, and make sure the better and widely equipped cpu
>> idle entry method MWAIT is used by xen if available.
>>
>> BTW, can we consider re-open MWAIT freature for dom0 in xen
>> hypervisor? We can discuss it post 4.0.
>>
>> Jimmy
>>
>> ACPI: re-enable mwait for xen cpuidle
>>
>> Xen hypervisor doesn't export mwait feature to dom0, but latest
>> Linux kernel start to check this feature while initializing _PDC
>> object. Bypass such check in pv-ops case to re-enable mwait for xen
>> cpuidle.
>>
>
> Why not just set or clear the MWAIT feature flag in xen_cpuid?
Yes, you pointed out another approach in dom0 side which has similar effect as
re-open MWAIT feature for dom0 in xen. I am not sure whether exposing the MWAIT
feature to whole dom0 kernel is ok. My way is just to narrow the impact.
Jimmy
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
| <Prev in Thread] |
Current Thread |
[Next in Thread>
|
- [Xen-devel] [PATCH]ACPI: re-enable mwait for xen cpuidle, Wei, Gang
- RE: [Xen-devel] [PATCH]ACPI: re-enable mwait for xen cpuidle, Wei, Gang
- Re: [Xen-devel] [PATCH]ACPI: re-enable mwait for xen cpuidle, Jeremy Fitzhardinge
- RE: [Xen-devel] [PATCH]ACPI: re-enable mwait for xen cpuidle, Wei, Gang
- Re: [Xen-devel] [PATCH]ACPI: re-enable mwait for xen cpuidle, Jeremy Fitzhardinge
- RE: [Xen-devel] [PATCH]ACPI: re-enable mwait for xen cpuidle, Wei, Gang
|
|
|
Home