netdev - Re: [PATCHv2] [XFRM]: Speed up xfrm_policy and xfrm

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Date:	Thu, 28 Feb 2008 21:31:48 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	timo.teras@....fi
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCHv2] [XFRM]: Speed up xfrm_policy and xfrm_state walking

From: Timo_Teräs <timo.teras@....fi>
Date: Fri, 15 Feb 2008 20:22:54 +0200

> 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@....fi>

Applied, although this will make add/delete slightly slower.

Could you do that AF_KEY dumping patch you talked about?  I change my
mind, we can do it.

THanks.
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