Re: [PATCH 00/23] Add KVM support for PPC64 (970) host

[Avi Kivity <avi@redhat.com>]

On 07/08/2009 12:51 PM, Benjamin Herrenschmidt wrote:
> On Wed, 2009-07-08 at 11:43 +0300, Avi Kivity wrote:
>    
>> On 07/08/2009 11:19 AM, Benjamin Herrenschmidt wrote:
>>      
>>>> Can you explain your concerns?
>>>>
>>>>          
>>> Nothing really just yet. As I said, I need to get my head around Alex
>>> code and figure before I take a position here. It might just be easier
>>> for us to hook into the low level hash table invalidation code instead
>>> and totally ignore the linux PTEs.
>>>
>>>        
>> Are the hashes lazily or eagerly populated wrt the linux ptes?
>>      
>
> Lazily.
>    

In this case how can hooking the hashes work?

kvm obtains pages by calling get_user_pages_fast() so you can have a 
page in the shadow hash which is not present in the host hash.

-- 
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