tree 895dc92dcf6b658d78838e0a23db3dd29c8be695
parent fe1a5f031e76bd8761a7803d75b95ee96e84a574
author Timo Teräs <timo.teras@iki.fi> 1270600205 +0000
committer David S. Miller <davem@davemloft.net> 1270636999 -0700

xfrm: cache bundles instead of policies for outgoing flows

__xfrm_lookup() is called for each packet transmitted out of
system. The xfrm_find_bundle() does a linear search which can
kill system performance depending on how many bundles are
required per policy.

This modifies __xfrm_lookup() to store bundles directly in
the flow cache. If we did not get a hit, we just create a new
bundle instead of doing slow search. This means that we can now
get multiple xfrm_dst's for same flow (on per-cpu basis).

Signed-off-by: Timo Teras <timo.teras@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>