xiaomi-sm8450/android_kernel_xiaomi_sm8450
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[TCP]: Don't set SKB owner in tcp_transmit_skb().

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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>
This commit is contained in:
David S. Miller
2006-11-09 19:58:25 -08:00
parent ef56e622c6
commit 931731123a
8 changed files with 10 additions and 12 deletions
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3
include/net/inet_connection_sock.h
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@@ -36,7 +36,8 @@ struct tcp_congestion_ops;
* (i.e. things that depend on the address family)
*/
struct inet_connection_sock_af_ops {
int (*queue_xmit)(struct sk_buff *skb, int ipfragok);
int (*queue_xmit)(struct sk_buff *skb, struct sock *sk,
int ipfragok);
void (*send_check)(struct sock *sk, int len,
struct sk_buff *skb);
int (*rebuild_header)(struct sock *sk);