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Cc: Blue Swirl <blauwirbel@gmail.com>, Laurent Vivier <Laurent.Vivier@bull.net>, Andrea Arcangeli <andrea@qumranet.com>, Paul Brook <paul@codesourcery.com>

Jamie Lokier wrote:
> Anthony Liguori wrote:
>   
>> Actually, this is precisely what I'd like to do.  The key is to 
>> mmap(MAP_PRIVATE) from the underling file directly into the guest's 
>> memory.  Should be just as applicable to QEMU as KVM (although for KVM 
>> we need mmu-notifiers first).
>>     
>
> With QEMU, that would lead to a huge number of VMAs - different mmap
> address regions.  Linux (or any host for all I know) doesn't handle
> that well.
>
> On Linux you could use remap_file_pages to avoid the VMA problem.
>
>   

Hmm, if remap_file_pages() supports MAP_PRIVATE, that solves all the 
problems neatly.

Andrea, do you know if that combination works?

-- 
error compiling committee.c: too many arguments to function