Re: [Qemu-devel] Re: [PATCH][v2] Align file accesses with cache=off (O_DIRECT)

[Andrea Arcangeli]

On Wed, May 21, 2008 at 03:35:33PM -0500, Anthony Liguori wrote:
> Or if multiple guests are using the same backing file (imagine each guest 
> has it's own qcow file backed to a common one).  Or if we had a more 
> advanced storage system that did something like content addressable 
> storage.

Agreed. At least the pagecache sharing among different guests, can be
achieved with ksm too though, even if they don't share any qcow.