tree 597daa1cb98dba8fe8c2b679646ae7a9c8f0fa41
parent 07842561a873e8f25272bcebe7f6c7f1af7c1a2d
author Francesco Ruggeri <fruggeri@arista.com> 1510169026 -0800
committer David S. Miller <davem@davemloft.net> 1510535584 +0900

ipv6: try not to take rtnl_lock in ip6mr_sk_done

Avoid traversing the list of mr6_tables (which requires the
rtnl_lock) in ip6mr_sk_done(), when we know in advance that
a match will not be found.
This can happen when rawv6_close()/ip6mr_sk_done() is invoked
on non-mroute6 sockets.
This patch helps reduce rtnl_lock contention when destroying
a large number of net namespaces, each having a non-mroute6
raw socket.

v2: same patch, only fixed subject line and expanded comment.

Signed-off-by: Francesco Ruggeri <fruggeri@arista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>