On Thu, 30 Apr 2020 14:20:20 +0000 Haiyang Zhang <haiyangz@xxxxxxxxxxxxx> wrote: > > -----Original Message----- > > From: Jesper Dangaard Brouer <brouer@xxxxxxxxxx> > > > > The hyperv NIC drivers XDP implementation is rather disappointing as it will > > be a slowdown to enable XDP on this driver, given it will allocate a new page > > for each packet and copy over the payload, before invoking the XDP BPF- > > prog. > > This needs correction. As I said previously -- > This statement is not accurate -- The data path of netvsc driver does memory > allocation and copy even without XDP, so it's not "a slowdown to enable XDP". Okay, I have changed the paragraph text to: The hyperv NIC driver does memory allocation and copy even without XDP. In XDP mode it will allocate a new page for each packet and copy over the payload, before invoking the XDP BPF-prog. -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer
