Re: [Qemu-devel] [PATCH] Inter-VM shared memory PCI device

[Avi Kivity]

On 03/10/2010 07:41 PM, Paul Brook wrote:
> > > You're much better off using a bulk-data transfer API that relaxes
> > > coherency requirements.  IOW, shared memory doesn't make sense for TCG
> > >        
> > Rather, tcg doesn't make sense for shared memory smp.  But we knew that
> > already.
> >      
> In think TCG SMP is a hard, but soluble problem, especially when you're
> running guests used to coping with NUMA.
>    

Do you mean by using a per-cpu tlb?  These kind of solutions are 
generally slow, but tcg's slowness may mask this out.

> TCG interacting with third parties via shared memory is probably never going
> to make sense.
>    

The third party in this case is qemu.

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