diff options
| author | Tom Herbert <therbert@google.com> | 2013-01-22 13:50:39 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-01-23 22:44:01 +0400 |
| commit | 5ba24953e9707387cce87b07f0d5fbdd03c5c11b (patch) | |
| tree | c98e56f8a06f07ff585f85cbe6af8cd9c19f2ca6 /include/net/inet6_hashtables.h | |
| parent | ba418fa357a7b3c9d477f4706c6c7c96ddbd1360 (diff) | |
| download | linux-5ba24953e9707387cce87b07f0d5fbdd03c5c11b.tar.xz | |
soreuseport: TCP/IPv6 implementation
Motivation for soreuseport would be something like a web server
binding to port 80 running with multiple threads, where each thread
might have it's own listener socket. This could be done as an
alternative to other models: 1) have one listener thread which
dispatches completed connections to workers. 2) accept on a single
listener socket from multiple threads. In case #1 the listener thread
can easily become the bottleneck with high connection turn-over rate.
In case #2, the proportion of connections accepted per thread tends
to be uneven under high connection load (assuming simple event loop:
while (1) { accept(); process() }, wakeup does not promote fairness
among the sockets. We have seen the disproportion to be as high
as 3:1 ratio between thread accepting most connections and the one
accepting the fewest. With so_reusport the distribution is
uniform.
Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/inet6_hashtables.h')
| -rw-r--r-- | include/net/inet6_hashtables.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/net/inet6_hashtables.h b/include/net/inet6_hashtables.h index 9e34c877a770..7ca75cbbf75e 100644 --- a/include/net/inet6_hashtables.h +++ b/include/net/inet6_hashtables.h @@ -71,6 +71,8 @@ extern struct sock *__inet6_lookup_established(struct net *net, extern struct sock *inet6_lookup_listener(struct net *net, struct inet_hashinfo *hashinfo, + const struct in6_addr *saddr, + const __be16 sport, const struct in6_addr *daddr, const unsigned short hnum, const int dif); @@ -88,7 +90,8 @@ static inline struct sock *__inet6_lookup(struct net *net, if (sk) return sk; - return inet6_lookup_listener(net, hashinfo, daddr, hnum, dif); + return inet6_lookup_listener(net, hashinfo, saddr, sport, + daddr, hnum, dif); } static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo, |