diff options
author | Tom Herbert <therbert@google.com> | 2013-01-22 09:50:39 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2013-01-23 18:44:01 (GMT) |
commit | 5ba24953e9707387cce87b07f0d5fbdd03c5c11b (patch) | |
tree | c98e56f8a06f07ff585f85cbe6af8cd9c19f2ca6 /include/net/netfilter | |
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/netfilter')
-rw-r--r-- | include/net/netfilter/nf_tproxy_core.h | 1 |
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 1937964..36d9379 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); |