net: skb_segment() provides list head and tail
authorEric Dumazet <edumazet@google.com>
Sat, 4 Oct 2014 03:59:19 +0000 (20:59 -0700)
committerDavid S. Miller <davem@davemloft.net>
Mon, 6 Oct 2014 04:37:30 +0000 (00:37 -0400)
commitbec3cfdca36bf43cfa3751ad7b56db1a307e0760
treed9c2d8352b0cc41d43dc23b7a7eafdac6758aeb3
parent45d9cc7c609680e921060d3eb4e399043eb5e4be
net: skb_segment() provides list head and tail

Its unfortunate we have to walk again skb list to find the tail
after segmentation, even if data is probably hot in cpu caches.

skb_segment() can store the tail of the list into segs->prev,
and validate_xmit_skb_list() can immediately get the tail.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/core/dev.c
net/core/skbuff.c