diff options
| author | Eric Dumazet <edumazet@google.com> | 2014-06-27 08:36:16 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-07-01 23:46:21 -0700 |
| commit | 9fe516ba3fb29b6f6a752ffd93342fdee500ec01 (patch) | |
| tree | 4254ea02ed5d51d92fd7109d33d28bc95b8d3fb1 /include/net/inet_timewait_sock.h | |
| parent | 090cce42639c2c82bce2cc26a902e4c674c62882 (diff) | |
inet: move ipv6only in sock_common
When an UDP application switches from AF_INET to AF_INET6 sockets, we
have a small performance degradation for IPv4 communications because of
extra cache line misses to access ipv6only information.
This can also be noticed for TCP listeners, as ipv6_only_sock() is also
used from __inet_lookup_listener()->compute_score()
This is magnified when SO_REUSEPORT is used.
Move ipv6only into struct sock_common so that it is available at
no extra cost in lookups.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/inet_timewait_sock.h')
| -rw-r--r-- | include/net/inet_timewait_sock.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/net/inet_timewait_sock.h b/include/net/inet_timewait_sock.h index 61474ea02152..6c566034e26d 100644 --- a/include/net/inet_timewait_sock.h +++ b/include/net/inet_timewait_sock.h @@ -108,6 +108,7 @@ struct inet_timewait_sock { #define tw_family __tw_common.skc_family #define tw_state __tw_common.skc_state #define tw_reuse __tw_common.skc_reuse +#define tw_ipv6only __tw_common.skc_ipv6only #define tw_bound_dev_if __tw_common.skc_bound_dev_if #define tw_node __tw_common.skc_nulls_node #define tw_bind_node __tw_common.skc_bind_node @@ -131,7 +132,7 @@ struct inet_timewait_sock { __be16 tw_sport; kmemcheck_bitfield_begin(flags); /* And these are ours. */ - unsigned int tw_ipv6only : 1, + unsigned int tw_pad0 : 1, /* 1 bit hole */ tw_transparent : 1, tw_flowlabel : 20, tw_pad : 2, /* 2 bits hole */ |