On Tue, Nov 21, 2017 at 07:41:00AM +0000, Hu, Jiayu wrote: > Hi Stephen, > > > -----Original Message----- > > From: Stephen Hemminger [mailto:step...@networkplumber.org] > > Sent: Tuesday, November 21, 2017 3:13 PM > > To: Hu, Jiayu <jiayu...@intel.com> > > Cc: dev@dpdk.org; y...@fridaylinux.org; Tan, Jianfeng > > <jianfeng....@intel.com> > > Subject: Re: [dpdk-dev] [PATCH] vhost: support UDP Fragmentation Offload > > > > On Tue, 21 Nov 2017 14:56:52 +0800 > > Jiayu Hu <jiayu...@intel.com> wrote: > > > > > In virtio, UDP Fragmentation Offload (UFO) includes two parts: host UFO > > > and guest UFO. Guest UFO means the frontend can receive large UDP > > packets, > > > and host UFO means the backend can receive large UDP packets. This patch > > > supports host UFO and guest UFO for vhost-user. > > > > > > Signed-off-by: Jiayu Hu <jiayu...@intel.com> > > > > This may no longer be a desirable feature to implement. > > UFO was just deprecated and removed from Linux. > > It had no useful benefit. > > The main reason of supporting UFO is to make the backend live migration from > vhost-net to vhost-user possible. Host and guest UFO are default features for > virtio-net, > and vhost-net supports both. But vhosy-user doesn't support them. If we want > to > migrate from vhost-net to vhost-user, this features gap would cause live > migration fail. > > Thanks, > Jiayu >
Its not a widely used feature, but if it helps migrage people, its not a hard feature to support Acked-by: Neil Horman <nhor...@tuxdriver.com>
