Re: [PATCH 2/2] kvm: powerpc: set cache coherency only for kernel managed pages

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On 24.07.2013, at 11:35, Gleb Natapov wrote:

> On Wed, Jul 24, 2013 at 11:21:11AM +0200, Alexander Graf wrote:
>>> Are not we going to use page_is_ram() from  e500_shadow_mas2_attrib() as Scott commented?
>> 
>> rWhy aren't we using page_is_ram() in kvm_is_mmio_pfn()?
>> 
>> 
> Because it is much slower and, IIRC, actually used to build pfn map that allow
> us to check quickly for valid pfn.

Then why should we use page_is_ram()? :)

I really don't want the e500 code to diverge too much from what the rest of the kvm code is doing.


Alex

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