From: Jesper Dangaard Brouer <redacted>
Date: Wed, 27 Aug 2014 15:56:51 +0200

I do worry a bit, if writing skb->xmit_more in a more cache cold
scenarios could hurt us (as that cacheline seems to be read mostly),
but this is not a problem right now because it will always be cache
hot, as we always clear the entire SKB in alloc.

And as I mentioned to Eric, xmit_more sits right next to the queue
number which is also dirtied in the TX path.