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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2009-09-24 12:16:51 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-10-05 00:21:54 -0700 |
| commit | b3a5b6cc7cab89dcc3301add750f88019d910a2b (patch) | |
| tree | b22e79b455ee2c9b3b131ef1dcf9d997a24fe2ce /net/ipv4 | |
| parent | a9828ec6bc0b7e19a65f7e13daa8bd35a926a753 (diff) | |
| download | blackbird-op-linux-b3a5b6cc7cab89dcc3301add750f88019d910a2b.tar.gz blackbird-op-linux-b3a5b6cc7cab89dcc3301add750f88019d910a2b.zip | |
icmp: No need to call sk_write_space()
We can make icmp messages tx completion callback a litle bit faster.
Setting SOCK_USE_WRITE_QUEUE sk flag tells sock_wfree() to
not call sk_write_space() on a socket we know no thread is posssibly
waiting for write space. (on per cpu kernel internal icmp sockets only)
This avoids the sock_def_write_space() call and
read_lock(&sk->sk_callback_lock)/read_unlock(&sk->sk_callback_lock) calls
as well.
We avoid three atomic ops.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/icmp.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index 5bc13fe816d1..84adb5754c96 100644 --- a/net/ipv4/icmp.c +++ b/net/ipv4/icmp.c @@ -1165,6 +1165,10 @@ static int __net_init icmp_sk_init(struct net *net) sk->sk_sndbuf = (2 * ((64 * 1024) + sizeof(struct sk_buff))); + /* + * Speedup sock_wfree() + */ + sock_set_flag(sk, SOCK_USE_WRITE_QUEUE); inet_sk(sk)->pmtudisc = IP_PMTUDISC_DONT; } |
