tree 5478cafc2fd175ea7f2307e4eda1f6a9a8618733
parent baf785bacc9f840104fc2dfedd2b72b5cbb4e103
author Eric Dumazet <edumazet@google.com> 1382052427 -0700
committer David S. Miller <davem@davemloft.net> 1382069331 -0400

net: refactor sk_page_frag_refill()

While working on virtio_net new allocation strategy to increase
payload/truesize ratio, we found that refactoring sk_page_frag_refill()
was needed.

This patch splits sk_page_frag_refill() into two parts, adding
skb_page_frag_refill() which can be used without a socket.

While we are at it, add a minimum frag size of 32 for
sk_page_frag_refill()

Michael will either use netdev_alloc_frag() from softirq context,
or skb_page_frag_refill() from process context in refill_work()
 (GFP_KERNEL allocations)

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Michael Dalton <mwdalton@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>