Re: [Xen-devel] [PATCH] x86: Use deep C states for off-lined CPUs

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 29.02.12 at 15:55, Boris Ostrovsky <boris.ostrovsky@xxxxxxx> wrote:
> On 02/29/12 00:21, Liu, Jinsong wrote:
>> Hmm, no.
>>
>> It need flush cache, as long as *deep Cx* would be spurious-wokenup.
>> The reason clflush here is, it's a light-weight flush, in fact it also could 
> use wbinvd if not consider performance.
> 
> What address would need to be CFLUSH'd ? Both "address" and 
> "pmtmr_ioport_local"?

Hardly - these are both I/O ports.

Jan


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