netdev - Re: [PATCH net-next-2.6] net_sched: sfq: allow divisor to be a parameter

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Message-Id: <20110120.165618.180427971.davem@davemloft.net>
Date:	Thu, 20 Jan 2011 16:56:18 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, kaber@...sh.net, hawk@...u.dk,
	jarkao2@...il.com, hadi@...erus.ca, shemminger@...tta.com
Subject: Re: [PATCH net-next-2.6] net_sched: sfq: allow divisor to be a
 parameter

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Thu, 20 Jan 2011 11:14:58 +0100

> SFQ currently uses a 1024 slots hash table, and its internal structure
> (sfq_sched_data) allocation needs order-1 page on x86_64
> 
> Allow tc command to specify a divisor value (hash table size), between 1
> and 65536.
> If no value is provided, assume the 1024 default size.
> 
> This allows admins to setup smaller (or bigger) SFQ for specific needs.
> 
> This also brings back sfq_sched_data allocations to order-0 ones, saving
> 3KB per SFQ qdisc.
> 
> Jesper uses ~55.000 SFQ in one machine, this patch should free 165 MB of
> memory.
> 
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Applied.
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