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inet: Decrease overhead of on-stack inet_cork.

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When we fast path datagram sends to avoid locking by putting
the inet_cork on the stack we use up lots of space that isn't
necessary.

This is because inet_cork contains a "struct flowi" which isn't
used in these code paths.

Split inet_cork to two parts, "inet_cork" and "inet_cork_full".
Only the latter of which has the "struct flowi" and is what is
stored in inet_sock.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
This commit is contained in:
David S. Miller
2011-05-06 15:02:07 -07:00
parent ad638bd16d
commit bdc712b4c2
5 changed files with 41 additions and 33 deletions
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2
include/net/ip.h
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@@ -132,7 +132,7 @@ extern struct sk_buff *ip_make_skb(struct sock *sk,
static inline struct sk_buff *ip_finish_skb(struct sock *sk)
{
return __ip_make_skb(sk, &sk->sk_write_queue, &inet_sk(sk)->cork);
return __ip_make_skb(sk, &sk->sk_write_queue, &inet_sk(sk)->cork.base);
}
/* datagram.c */