On Tue, Nov 29, 2016 at 12:05:20PM -0800, John Fastabend wrote: > This implements virtio_net for the mergeable buffers and big_packet > modes. I tested this with vhost_net running on qemu and did not see > any issues. For testing num_buf > 1 I added a hack to vhost driver > to only but 100 bytes per buffer. > > There are some restrictions for XDP to be enabled and work well > (see patch 3) for more details. > > 1. LRO must be off > 2. MTU must be less than PAGE_SIZE > 3. queues must be available to dedicate to XDP > 4. num_bufs received in mergeable buffers must be 1 > 5. big_packet mode must have all data on single page > > Please review any comments/feedback welcome as always. > > v2, fixes rcu usage throughout thanks to Eric and the use of > num_online_cpus() usage thanks to Jakub. > > v3, add slowpath patch to handle num_bufs > 1 > > Thanks, > John
BTW this is threaded incorrectly: patch 1/6 isn't a reply to 0/6, patches 2 and on are replies to patch 1. I'm busy until end of week, I'll review Monday. Sorry about the delay. > --- > > John Fastabend (6): > net: virtio dynamically disable/enable LRO > net: xdp: add invalid buffer warning > virtio_net: Add XDP support > virtio_net: add dedicated XDP transmit queues > virtio_net: add XDP_TX support > virtio_net: xdp, add slowpath case for non contiguous buffers > > > drivers/net/virtio_net.c | 344 > +++++++++++++++++++++++++++++++++++++++++++++- > include/linux/filter.h | 1 > net/core/filter.c | 6 + > 3 files changed, 346 insertions(+), 5 deletions(-) > > -- > Signature
