2015-12-03 10:27, Yuanhan Liu: > So that we will not break ABI in future extension by adding few more > fields. > > Struct vhost_virtqueue is reserved with 16 qwords (the later vhost-live > migration support would at least consume 3 of them), and struct virtio_net > is reserved with a bit more, 64 qwords, as there is only one instance for > a virtio nic instance. > > Note that both reservation are not placed at the end of the struct, but > instead before the last field, since both the last field at the two struct > take a lot spaces. Putting the reservation after it would divide those > reserved fields to another cacheline. (we might need fix them in future, btw) > > CC: Panu Matilainen <pmatilai at redhat.com> > CC: Thomas Monjalon <thomas.monjalon at 6wind.com> > CC: Michael S. Tsirkin <mst at redhat.com> > CC: Victor Kaplansky <vkaplans at redhat.com> > Suggested-by: Panu Matilainen <pmatilai at redhat.com> > Signed-off-by: Yuanhan Liu <yuanhan.liu at linux.intel.com> > --- > > Is the reservation a bit too large? :)
You are maintainer in this area. Applied, thanks
