On Thu, 2012-01-12 at 00:13 +0200, Michael S. Tsirkin wrote:

quoted

We typically pre-populate the data rings with skb's for 1500 and 9000
bytes packets. Small packets come in immediately in the completion ring,
and large packets via the data ring. 

Won't real workloads suffer from packet reordering?

No, they aren't re-ordered. The completion ring has an entry for each
packet, in order. Those entries eventually reference the entry index in
the data rings if the data was put there instead of being immediate.

Cheers,
Ben.