hi
In netback netif_be_start_xmit()
if (!netif->copying_receiver ||
((skb_headlen(skb) + offset_in_page(skb->data)) >= PAGE_SIZE)) {
struct sk_buff *nskb = netbk_copy_skb(skb);
which calls skb_copy_bits()
it means when rx-flip, the skb data and frags are copied to another buffer.
then the buffer flip with domU''s pages.
so before page flip with domU, copying happens in dom0. Does rx-flip make any
sense?
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