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authorEric Dumazet <edumazet@google.com>2012-05-02 09:58:29 +0000
committerDavid S. Miller <davem@davemloft.net>2012-05-02 21:11:11 -0400
commitb081f85c2977b1cbb6e635d53d9512f1ef985972 (patch)
tree3b41dfe3ee282c175907e8bcf9614385115fa2e6 /net/ipv4/tcp.c
parent923dd347b8904c24bcac89bf038ed4da87f8aa90 (diff)
net: implement tcp coalescing in tcp_queue_rcv()
Extend tcp coalescing implementing it from tcp_queue_rcv(), the main receiver function when application is not blocked in recvmsg(). Function tcp_queue_rcv() is moved a bit to allow its call from tcp_data_queue() This gives good results especially if GRO could not kick, and if skb head is a fragment. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexander Duyck <alexander.h.duyck@intel.com> Cc: Neal Cardwell <ncardwell@google.com> Cc: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp.c')
-rw-r--r--net/ipv4/tcp.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 6802c89bc44d..c2cff8b62772 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -981,8 +981,8 @@ static inline int select_size(const struct sock *sk, bool sg)
static int tcp_send_rcvq(struct sock *sk, struct msghdr *msg, size_t size)
{
struct sk_buff *skb;
- struct tcp_skb_cb *cb;
struct tcphdr *th;
+ bool fragstolen;
skb = alloc_skb(size + sizeof(*th), sk->sk_allocation);
if (!skb)
@@ -995,14 +995,14 @@ static int tcp_send_rcvq(struct sock *sk, struct msghdr *msg, size_t size)
if (memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size))
goto err_free;
- cb = TCP_SKB_CB(skb);
-
TCP_SKB_CB(skb)->seq = tcp_sk(sk)->rcv_nxt;
TCP_SKB_CB(skb)->end_seq = TCP_SKB_CB(skb)->seq + size;
TCP_SKB_CB(skb)->ack_seq = tcp_sk(sk)->snd_una - 1;
- tcp_queue_rcv(sk, skb, sizeof(*th));
-
+ if (tcp_queue_rcv(sk, skb, sizeof(*th), &fragstolen)) {
+ WARN_ON_ONCE(fragstolen); /* should not happen */
+ __kfree_skb(skb);
+ }
return size;
err_free: