Re: NetBSD Dom0 and (kind of) power management

[Jean-Yves Migeon <jeanyves.migeon%free.fr@localhost>]

On 18.03.2011 05:49, Jukka Ruohonen wrote:
> On Fri, Mar 11, 2011 at 01:04:05AM +0100, Jean-Yves Migeon wrote:
>> It needs ACPI work within NetBSD, oriented towards Xen. Most of the
>> machinery currently used for x86 can be reused I think, the missing part
>> being the code that will feed hypervisor with the information obtained
>> via ACPI.
> 
> Can you outline the general problems involving ACPI and Xen? These issues
> needs to be fixed sooner or later, given that the former is mandatory for
> things like NUMA, etc.

I'd say that the general problems reside in the power management area;
as dom0 is not necessarily aware of hypervisor's choices regarding
scheduling of other domains, it cannot make proper decisions regarding
physical CPU power control.

Other parts, like NUMA, or device configuration/attachement, are less
problematic. It is more a matter of parsing tables and feeding the
hypervisor with the obtained information.


-- 
Jean-Yves Migeon
jeanyves.migeon%free.fr@localhost