Messages in this thread | | | Date | Wed, 31 Oct 2012 17:05:47 +0200 | From | Gleb Natapov <> | Subject | Re: [GIT PULL] Linux KVM tool for v3.7-rc0 |
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On Tue, Oct 23, 2012 at 10:20:34AM +0800, Asias He wrote: > On Mon, Oct 22, 2012 at 6:16 PM, Gleb Natapov <gleb@redhat.com> wrote: > > On Mon, Oct 22, 2012 at 11:24:19AM +0200, Avi Kivity wrote: > >> On 10/21/2012 05:39 PM, Pekka Enberg wrote: > >> > > >> > On Sun, Oct 21, 2012 at 5:02 PM, richard -rw- weinberger > >> > <richard.weinberger@gmail.com> wrote: > >> >> qemu supports all these features. > >> >> E.g. to access the host fs use: > >> >> qemu ... \ > >> >> -fsdev local,security_model=passthrough,id=fsdev-root,path=/your/root/,readonly > >> >> \ > >> >> -device virtio-9p-pci,id=fs-root,fsdev=fsdev-root,mount_tag=rootshare > >> > > >> > IIRC, QEMU uses SLIRP non-root zero-config networking which is much > >> > more limited than what LKVM offers out of the box. > >> > >> Curious, what are the differences? > >> > > Me too, especially as we discussed replacing SLIRP with lkvm code for > > userspace networking and decided (for reasons I do not remember) that it > > lacks futures SLIRP has. Was it host port redirection? > > Yes. Currently, there is no host to guest port forward support in lkvm. > However, it's faster than slirp. > e.g. tcp bandwidth in a 100Mb/s environment > lkvm's userspace networking ~90Mb/s v.s qemu's slirp ~10Mb/s > This is not entirely slirp fault BTW. If you run QEMU with "-usbdevice tablet", slirp bandwidth goes up to 80-90Mb too.
-- Gleb.
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