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

Avi Kivity
2010-03-11T06:33:53Z

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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