On Friday, December 07, 2012 04:18:56 PM Michael S. Tsirkin wrote: > Add multiqueue support to virtio network device. > Add a new feature flag VIRTIO_NET_F_MQ for this feature, a new > configuration field max_virtqueue_pairs to detect supported number of > virtqueues as well as a new command VIRTIO_NET_CTRL_MQ to program > packet steering for unidirectional protocols. > > --- > > Changes in v6: > - rename RFS -> multiqueue to avoid confusion with RFS in linux > mention automatic receive steering as Rusty suggested > > Changes in v5: > - Address Rusty's comments. > Changes are only in the text, not the ideas. > - Some minor formatting changes. > > Changes in v4: > - address Jason's comments > - have configuration specify the number of VQ pairs and not pairs - 1 > > Changes in v3: > - rename multiqueue -> rfs this is what we support > - Be more explicit about what driver should do. > - Simplify layout making VQs functionality depend on feature. > - Remove unused commands, only leave in programming # of queues > > Changes in v2: > Address Jason's comments on v2: > - Changed STEERING_HOST to STEERING_RX_FOLLOWS_TX: > this is both clearer and easier to support. > It does not look like we need a separate steering command > since host can just watch tx packets as they go. > - Moved RX and TX steering sections near each other. > - Add motivation for other changes in v2 > > Changes in v1 (from Jason's rfc): > - reserved vq 3: this makes all rx vqs even and tx vqs odd, which > looks nicer to me. > - documented packet steering, added a generalized steering programming > command. Current modes are single queue and host driven multiqueue, > but I envision support for guest driven multiqueue in the future. > - make default vqs unused when in mq mode - this wastes some memory > but makes it more efficient to switch between modes as > we can avoid this causing packet reordering. > > Rusty, could you please take a look and comment soon? > If this looks OK to everyone, we can proceed with finalizing the > implementation. Would be nice to try and put it in 3.8. > > diff --git a/virtio-spec.lyx b/virtio-spec.lyx > index 83f2771..c5b32c4 100644 > --- a/virtio-spec.lyx > +++ b/virtio-spec.lyx > @@ -59,6 +59,7 @@ > \author -608949062 "Rusty Russell,,," > \author -385801441 "Cornelia Huck" cornelia.huck@xxxxxxxxxx > \author 1531152142 "Paolo Bonzini,,," > +\author 1986246365 "Michael S. Tsirkin" > \end_header [...] > + > +\begin_layout Plain Layout > + > +\change_inserted 1986246365 1353594263 > + > +#define VIRTIO_NET_CTRL_MQ 1 Should be 4 here. > +\end_layout > + > +\begin_layout Plain Layout > + > +\change_inserted 1986246365 1353594273 > + > + #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET 0 > +\end_layout > + > +\begin_layout Plain Layout > + > +\change_inserted 1986246365 1353594273 > + > + #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN 1 > +\end_layout > + [...] -- 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
