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] [PATCH 1/9] Add cpu idle pwr mgmt to xen

To: "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] [PATCH 1/9] Add cpu idle pwr mgmt to xen
From: "Wei, Gang" <gang.wei@xxxxxxxxx>
Date: Sat, 26 Apr 2008 17:55:49 +0800
Delivery-date: Sat, 26 Apr 2008 02:56:26 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <C4379481.1FF24%keir.fraser@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/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <094BCE01AFBE9646AF220B0B3F367AAB02FE2C6E@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> <C4379481.1FF24%keir.fraser@xxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: AcimklJCPOH/MtO7S+K/FieFl7t35AAQgZa+ACusmWA=
Thread-topic: [Xen-devel] [PATCH 1/9] Add cpu idle pwr mgmt to xen
Revised according to Keir's comments. Resubmit.

Jimmy

On Friday, April 25, 2008 9:01 PM, Keir Fraser wrote:
> On 25/4/08 06:07, "Wei, Gang" <gang.wei@xxxxxxxxx> wrote:
> 
>> Add basic acpi C-states based cpu idle power mgmt in xen for x86.
>> 
>> It includes:
>>  1. hypercall definition for passing ACPI info.
>>  2. C1/C2 support.
>>  3. Mwait support, as well as legacy ioport.
>>  4. Ladder policy from Linux kernel.
>> 
>> A lot of code & ideas came from Linux.
> 
> Comments:
>  1. In the idle loop you can just replace default_idle() with
(*pm_idle)()
> directly.
>  2. Do not modify common/keyhandler.c. Instead add an __initcall() in
> cpu_idle.c to register your keyhandler. The initcall function and your
> keyhandler can both be 'static' functions.
>  3. I don't like ifdef COMPAT all over new files. Define a separate
compat
> shim file, built only for x86_64, which converts compat structures to
> native 64-bit structures. Then cpu_idle.c need know nothing about
compat
> issues and will be cleaner for it.
>  4. Don't define placeholders for Px and Tx info in the platform
hypercall
> header. They should be introduced when they are actually implemented.
> 
> That's it. I haven't looked at the other patches yet, but you can
probably
> make the above fixes and resubmit just this one patch without
affecting
> the others. I'll look at them after this one goes in.
> 
>  -- Keir

Attachment: xen-1-cx_base-0426.patch
Description: xen-1-cx_base-0426.patch

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