]> err.no Git - linux-2.6/commit
[XFRM]: Speed up xfrm_policy and xfrm_state walking
authorTimo Teras <timo.teras@iki.fi>
Fri, 29 Feb 2008 05:31:08 +0000 (21:31 -0800)
committerDavid S. Miller <davem@davemloft.net>
Fri, 29 Feb 2008 05:31:08 +0000 (21:31 -0800)
commit4c563f7669c10a12354b72b518c2287ffc6ebfb3
tree056ec93f192f31640f32983c9e11bc7ce1c0692f
parent1e04d530705280770e003ac8db516722cca54758
[XFRM]: Speed up xfrm_policy and xfrm_state walking

Change xfrm_policy and xfrm_state walking algorithm from O(n^2) to O(n).
This is achieved adding the entries to one more list which is used
solely for walking the entries.

This also fixes some races where the dump can have duplicate or missing
entries when the SPD/SADB is modified during an ongoing dump.

Dumping SADB with 20000 entries using "time ip xfrm state" the sys
time dropped from 1.012s to 0.080s.

Signed-off-by: Timo Teras <timo.teras@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/linux/xfrm.h
include/net/xfrm.h
net/key/af_key.c
net/xfrm/xfrm_policy.c
net/xfrm/xfrm_state.c
net/xfrm/xfrm_user.c