From: Jamal Hadi Salim <hadi@cyberus.ca>
Date: Tue, 10 Jun 2008 21:25:34 +0000 (-0700)
Subject: ipsec: pfkey should ignore events when no listeners
X-Git-Tag: v2.6.26-rc6~13^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=99c6f60e72f112b57ddb07abb2e5f771ee211f43;p=pandora-kernel.git

ipsec: pfkey should ignore events when no listeners

When pfkey has no km listeners, it still does a lot of work
before finding out there aint nobody out there.
If a tree falls in a forest and no one is around to hear it, does it make
a sound? In this case it makes a lot of noise:
With this short-circuit adding 10s of thousands of SAs using
netlink improves performance by ~10%.

Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
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