| commit | 78df76a065ae3b5dbcb9a29912adc02f697de498 | [log] [tgz] |
|---|---|---|
| author | Eric Dumazet <edumazet@google.com> | Fri Aug 24 05:40:47 2012 +0000 |
| committer | David S. Miller <davem@davemloft.net> | Fri Aug 24 11:47:48 2012 -0400 |
| tree | 5b9ab36790a2e0101a15d70bdf41b066ce0e55aa | |
| parent | a0dfb2634e5671770f598cda08002d8cda66ac77 [diff] |
ipv4: take rt_uncached_lock only if needed Multicast traffic allocates dst with DST_NOCACHE, but dst is not inserted into rt_uncached_list. This slowdown multicast workloads on SMP because rt_uncached_lock is contended. Change the test before taking the lock to actually check the dst was inserted into rt_uncached_list. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>