netdev - Re: [PATCH net-next-2.6] net_sched: RCU conversion of stab

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Message-ID: <4D384E2D.5050001@trash.net>
Date:	Thu, 20 Jan 2011 16:01:01 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Jesper Dangaard Brouer <hawk@...u.dk>,
	Jarek Poplawski <jarkao2@...il.com>, jamal <hadi@...erus.ca>
Subject: Re: [PATCH net-next-2.6] net_sched: RCU conversion of stab

Am 20.01.2011 14:48, schrieb Eric Dumazet:
> This patch converts stab qdisc management to RCU, so that we can perform
> the qdisc_calculate_pkt_len() call before getting qdisc lock.
> 
> This shortens the lock's held time in __dev_xmit_skb().
> 
> This permits more qdiscs to get TCQ_F_CAN_BYPASS status, avoiding lot of
> cache misses and so reducing latencies.
> 

Looks good to me.

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