On 19/04/2018 17:42, Michael S. Tsirkin wrote: >> A compiler barrier is enough on strongly-ordered memory platform. >> As it doesn't re-order store, PCI device won't see a stale index >> value. But a weakly-ordered memory needs sfence. > > Oh you are right. > > So it's only needed for non-intel platforms or when packets are in > WC memory then. And I don't know whether dpdk ever puts packets in WC > memory. > > I guess we'll cross this bridge when we get to it.
Non-TSO architectures seem important... Paolo --------------------------------------------------------------------- To unsubscribe, e-mail: virtio-dev-unsubscr...@lists.oasis-open.org For additional commands, e-mail: virtio-dev-h...@lists.oasis-open.org
