Eric Dumazet <eric.duma...@gmail.com> wrote: > On Sat, 2015-02-21 at 18:46 +0100, Florian Westphal wrote: > > Eric Dumazet <eric.duma...@gmail.com> wrote: > > > Hold on. > > > > > > I believe there is one race in the way you access skb->xmit_more _after_ > > > > > > txd->opts1 = cpu_to_le32(status); > > > > > > After this point, TX might have completed and TX completion already have > > > freed skb > > > > Hmm, I _thought_ HW would not start xmit of this descriptor/skb until after > > > > RTL_W8(TxPoll, NPQ); > > Note this 'kick' does not provide tail ptr. > > NIC basically looks at TX descriptors to find ones with the DescOwn bit > set. It stops when if find one TX descriptor _without_ DescOwn.
Makes sense, thanks for explaining this. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
