On Tue, Sep 06, 2016 at 09:00:14AM +0000, Xu, Qian Q wrote: > Just curious about the naming: vhost USER TX Zero copy. In fact, it's Vhost > RX zero-copy > For virtio, it's Virtio TX zero-copy. So, I wonder why we call it as Vhost TX > ZERO-COPY, > Any comments?
It's just that "Tx zero copy" looks more nature to me (yes, I took the name from the virtio point of view). Besides that, naming it to "vhost Rx zero copy" would be a little weird, based on we have functions like "virtio_dev_rx" in the enqueue path while here we just touch dequeue path. OTOH, I seldome say "vhost-user Tx zero copy"; I normally mention it as "Tx zero copy", without mentioning "vhost-user". For the flag RTE_VHOST_USER_TX_ZERO_COPY, all vhost-user flags start with "RTE_VHOST_USER_" prefix. --yliu