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Date: Thu, 22 Apr 2010 09:13:22 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: Changli Gao <xiaosuo@...il.com> Cc: "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org, Tom Herbert <therbert@...gle.com>, jamal <hadi@...erus.ca> Subject: Re: [PATCH v3] net: batch skb dequeueing from softnet input_pkt_queue Le jeudi 22 avril 2010 à 14:33 +0800, Changli Gao a écrit : > On Thu, Apr 22, 2010 at 7:05 AM, Eric Dumazet <eric.dumazet@...il.com> wrote: > > Le mercredi 14 avril 2010 à 17:52 +0800, Changli Gao a écrit : > >> batch skb dequeueing from softnet input_pkt_queue > >> > >> batch skb dequeueing from softnet input_pkt_queue to reduce potential lock > >> contention and irq disabling/enabling. > >> > >> Signed-off-by: Changli Gao <xiaosuo@...il.com> > >> ---- > > > > lock contention _is_ a problem, Jamal tests can show it. > > > > irq disabling/enabling is not, and force to use stop_machine() killer. > > > > Although irq_disabling/enabling is not, we should do our best to make > fast path as quickly as possible, and because stop_machine() is used > in slow patch, I think we can afford its weight. > > No thanks, this is out of the question. Talk to ixiacom guys, some people settle/dismantle dozens of network device per second, on production machines. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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