skbuff: optimize the pull_pages code in __pskb_pull_tail()
authorlinzhang <xiaolou4617@gmail.com>
Mon, 17 Jul 2017 09:25:02 +0000 (17:25 +0800)
committerDavid S. Miller <davem@davemloft.net>
Mon, 17 Jul 2017 15:56:50 +0000 (08:56 -0700)
commit3ccc6c6faaa93da70989177b91c7c3ef0df10937
tree4fcc27c0a605eae9a6a8740d5933c6030fc9837a
parentb3a703c7a698bcc0938fe22ba74d32593ad6e662
skbuff: optimize the pull_pages code in __pskb_pull_tail()

In the pull_pages code block, if the first frag size > eat,
we can end the loop in advance to avoid extra copy.

Signed-off-by: Lin Zhang <xiaolou4617@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/core/skbuff.c