Re: [kvm-devel] mmu notifiers

[Avi K. <av...@qu...>]

Christoph Lameter wrote:
> On Thu, 10 Jan 2008, Avi Kivity wrote:
>
>   
>> Actually sharing memory is possible even without this patch; one simply
>> mmap()s a file into the address space of both guests.  Or are you referring to
>> something else?
>>     
>
> A file from where? If a file is read by two guests then they will have 
> distinct page structs.
>
>   

Two kvm instances mmap() the file (from anywhere) into the guest address 
space.  That memory is shared, and will be backed by the same page 
structs at the same offset.

-- 
Any sufficiently difficult bug is indistinguishable from a feature.