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| author | Eric Dumazet <edumazet@google.com> | 2013-06-07 19:48:57 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-06-12 11:25:23 +0400 |
| commit | e9897071350bd9d94a56b5b6f79c85b1a98fc7e7 (patch) | |
| tree | d01026afb4450ef685722cd7a0fe1815336170ca /net/ipv4/udp_offload.c | |
| parent | 64153ce0a7b61b2a5cacb01805cbf670142339e9 (diff) | |
| download | linux-e9897071350bd9d94a56b5b6f79c85b1a98fc7e7.tar.xz | |
igmp: hash a hash table to speedup ip_check_mc_rcu()
After IP route cache removal, multicast applications using
a lot of multicast addresses hit a O(N) behavior in ip_check_mc_rcu()
Add a per in_device hash table to get faster lookup.
This hash table is created only if the number of items in mc_list is
above 4.
Reported-by: Shawn Bohrer <sbohrer@rgmadvisors.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Tested-by: Shawn Bohrer <sbohrer@rgmadvisors.com>
Reviewed-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/udp_offload.c')
0 files changed, 0 insertions, 0 deletions