netdev - Re: [PATCH iproute2] ip: speedup ip link

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Message-ID: <20120611145719.6337066e@nehalam.linuxnetplumber.net>
Date:	Mon, 11 Jun 2012 14:57:19 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH iproute2] ip: speedup ip link

On Sat, 09 Jun 2012 13:55:55 +0200
Eric Dumazet <eric.dumazet@...il.com> wrote:

> From: Eric Dumazet <edumazet@...gle.com>
> 
> ip link has quadratic behavior because store_nlmsg()
> has a head list pointer and search the end of list.
> 
> Provides a head/tail to cut time.
> 
> Time with 128000 net devices, to do "ip link show dev xxx"
> 
> Before: 2m3.594s
> After: 0m2.830s
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Looks good applied
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