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Re: [Xen-devel] [Hackathon minutes] PV network improvements

At 17:58 +0100 on 21 May (1369159125), Stefano Stabellini wrote:
> On Tue, 21 May 2013, Tim Deegan wrote:
> > At 11:51 +0100 on 21 May (1369137063), Stefano Stabellini wrote:
> > > Obviously in an ideal world we would be able to offer both at the same
> > > time, and maybe George's proposal is exactly what is going to achieve
> > > that. But I was describing the case that requires us to make a choice.
> > 
> > Righto.  I don't think we need to worry about that yet.  You're all
> > smart engineers, and I've heard a bunch of good ideas flying around that
> > address the costs of mapping and unmapping in backends.
> Right. I would consider the performance of "backend with all the memory
> mapped" as the limit we should try to achieve even without having all
> the memory mapped.

Yes, absolutely.

> But if it turns out that we are very far from it, we
> might want to consider allowing it as an option in the meantime.

Understood, and I still strongly disagree.


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