[Xen-devel] RE: [PATCH 0/6] Add memory add support to Xen

["Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>]

Nakajima, Jun wrote:
> Jiang, Yunhong wrote on Sun, 28 Jun 2009 at 02:26:51:
> 
>> 
>> There are several option to support it.
>> a) Move the ACPI event to Xen HV, that is sure to be a big changes.
>> b) Add some hook in Dom0, so that instead of add the new memory to
>> dom0, it will use hypercall to notify Xen HV.
>> c) Change current dom0 implementation. When dom0 get the ACPI event
>> and get the memory device's resource, it will not directly add the
>> memry to system, instead, it will notify user space with uevent. The
>> uevent script will ask kernel to add the new memory to system. In Xen
>> environment, the uevent script will notify Xen HV. We are still
>> investigating on this option. 
>> 
>> We are in early stage . any suggestion or new idea will be helpful
>> to us and welcome. 
>> 
> 
> I think the option b is the practical choice because the
> kernel typically has a well-defined routine for that, and the
> maintenance cost of the diff for dom0 should be very low. The
> option c may not work for other OS like Solaris...

Yes, the diff will be low. We will work on this way.

--jyh

> 
> Jun
> ___
> Intel Open Source Technology Center
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel