diff options
| author | David S. Miller | 2006-11-10 04:58:25 +0100 |
|---|---|---|
| committer | David S. Miller | 2006-12-03 06:21:52 +0100 |
| commit | 931731123a103cfb3f70ac4b7abfc71d94ba1f03 (patch) | |
| tree | 0af6636fde05f74a8aa5421bfe9828e2a209170d /net/ipv4/tcp_output.c | |
| parent | [NET] ip-sysctl.txt: Alphabetize. (diff) | |
| download | kernel-qcow2-linux-931731123a103cfb3f70ac4b7abfc71d94ba1f03.tar.gz kernel-qcow2-linux-931731123a103cfb3f70ac4b7abfc71d94ba1f03.tar.xz kernel-qcow2-linux-931731123a103cfb3f70ac4b7abfc71d94ba1f03.zip | |
[TCP]: Don't set SKB owner in tcp_transmit_skb().
The data itself is already charged to the SKB, doing
the skb_set_owner_w() just generates a lot of noise and
extra atomics we don't really need.
Lmbench improvements on lat_tcp are minimal:
before:
TCP latency using localhost: 23.2701 microseconds
TCP latency using localhost: 23.1994 microseconds
TCP latency using localhost: 23.2257 microseconds
after:
TCP latency using localhost: 22.8380 microseconds
TCP latency using localhost: 22.9465 microseconds
TCP latency using localhost: 22.8462 microseconds
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_output.c')
| -rw-r--r-- | net/ipv4/tcp_output.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index ca406157724c..f63e99aac2d5 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -426,7 +426,6 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it, th = (struct tcphdr *) skb_push(skb, tcp_header_size); skb->h.th = th; - skb_set_owner_w(skb, sk); /* Build TCP header and checksum it. */ th->source = inet->sport; @@ -479,7 +478,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it, if (after(tcb->end_seq, tp->snd_nxt) || tcb->seq == tcb->end_seq) TCP_INC_STATS(TCP_MIB_OUTSEGS); - err = icsk->icsk_af_ops->queue_xmit(skb, 0); + err = icsk->icsk_af_ops->queue_xmit(skb, sk, 0); if (likely(err <= 0)) return err; |