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authorTom Herbert <therbert@google.com>2013-01-22 09:50:39 +0000
committerDavid S. Miller <davem@davemloft.net>2013-01-23 13:44:01 -0500
commit5ba24953e9707387cce87b07f0d5fbdd03c5c11b (patch)
treec98e56f8a06f07ff585f85cbe6af8cd9c19f2ca6 /include/net/netfilter
parentba418fa357a7b3c9d477f4706c6c7c96ddbd1360 (diff)
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/netfilter')
-rw-r--r--include/net/netfilter/nf_tproxy_core.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/netfilter/nf_tproxy_core.h b/include/net/netfilter/nf_tproxy_core.h
index 19379644564..36d9379d4c4 100644
--- a/include/net/netfilter/nf_tproxy_core.h
+++ b/include/net/netfilter/nf_tproxy_core.h
@@ -152,6 +152,7 @@ nf_tproxy_get_sock_v6(struct net *net, const u8 protocol,
break;
case NFT_LOOKUP_LISTENER:
sk = inet6_lookup_listener(net, &tcp_hashinfo,
+ saddr, sport,
daddr, ntohs(dport),
in->ifindex);