netdev - Re: [PATCH net-next-2.6] rtnetlink: speedup rtnl_dump

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Date:	Sat, 24 Oct 2009 06:13:29 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, bcrl@...et.ca
Subject: Re: [PATCH net-next-2.6] rtnetlink: speedup rtnl_dump_ifinfo()

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Thu, 22 Oct 2009 16:34:41 +0200

> When handling large number of netdevice, rtnl_dump_ifinfo()
> is very slow because it has O(N^2) complexity.
> 
> Instead of scanning one single list, we can use the 256 sub lists
> of the dev_index hash table.
> 
> This considerably speedups "ip link" operations
> 
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Applied, thanks!
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