On 10/15/2014 01:40 PM, Rusty Russell wrote: > Jason Wang <jasow...@redhat.com> writes: >> Below should be useful for some experiments Jason is doing. >> I thought I'd send it out for early review/feedback. >> >> event idx feature allows us to defer interrupts until >> a specific # of descriptors were used. >> Sometimes it might be useful to get an interrupt after >> a specific descriptor, regardless. >> This adds a descriptor flag for this, and an API >> to create an urgent output descriptor. >> This is still an RFC: >> we'll need a feature bit for drivers to detect this, >> but we've run out of feature bits for virtio 0.X. >> For experimentation purposes, drivers can assume >> this is set, or add a driver-specific feature bit. >> >> Signed-off-by: Michael S. Tsirkin <m...@redhat.com> >> Signed-off-by: Jason Wang <jasow...@redhat.com> > The new VRING_DESC_F_URGENT bit is theoretically nicer, but for > networking (which tends to take packets in order) couldn't we just set > the event counter to give us a tx interrupt at the packet we want? > > Cheers, > Rusty.
Yes, we could. Recent RFC of enabling tx interrupt use this. _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
