summaryrefslogtreecommitdiff
path: root/include/net/inet6_hashtables.h
diff options
context:
space:
mode:
authorTom Herbert <therbert@google.com>2013-01-22 13:50:39 +0400
committerDavid S. Miller <davem@davemloft.net>2013-01-23 22:44:01 +0400
commit5ba24953e9707387cce87b07f0d5fbdd03c5c11b (patch)
treec98e56f8a06f07ff585f85cbe6af8cd9c19f2ca6 /include/net/inet6_hashtables.h
parentba418fa357a7b3c9d477f4706c6c7c96ddbd1360 (diff)
downloadlinux-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.h5
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,