Avi Kivity <avi@xxxxxxxxxx> wrote: > > virtio is already non-kvm-specific (lguest uses it) and non-pci-specific > (s390 uses it). I think Greg's work shows that putting the backend in the kernel can dramatically reduce the cost of a single guest->host transaction. I'm sure the same thing would work for virtio too. > If you have a good exit mitigation scheme you can cut exits by a factor > of 100; so the userspace exit costs are cut by the same factor. If you > have good copyless networking APIs you can cut the cost of copies to > zero (well, to the cost of get_user_pages_fast(), but a kernel solution > needs that too). Given the choice of having to mitigate or not having the problem in the first place, guess what I would prefer :) Cheers, -- Visit Openswan at http://www.openswan.org/ Email: Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
