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| 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 /lib/memory-notifier-error-inject.c | |
| parent | 090cce42639c2c82bce2cc26a902e4c674c62882 (diff) | |
| download | talos-op-linux-9fe516ba3fb29b6f6a752ffd93342fdee500ec01.tar.gz talos-op-linux-9fe516ba3fb29b6f6a752ffd93342fdee500ec01.zip | |
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 'lib/memory-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions
