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Message-Id: <200905250023.31056.denys@visp.net.lb> Date: Mon, 25 May 2009 00:23:30 +0300 From: Denys Fedoryschenko <denys@...p.net.lb> To: Benjamin LaHaise <bcrl@...et.ca> Cc: netdev@...r.kernel.org Subject: Re: regression: unregister_netdev() unusably slow Once oprofile gave me hint about similar issue On Sunday 24 May 2009 22:21:50 Benjamin LaHaise wrote: > Hi folks, > > I just ran a few L2TP tests against 2.6.30-rc7, and it looks like network > device deletion has become unusably slow. At least in 2.6.27.10, deleting > 1000 network interfaces takes less than 2 seconds of real time. The same > test run under 2.6.30-rc7 is taking hundreds of seconds to delete 1000 > interfaces at a rate of about 5 per second. The interfaces all share the > same local ip address, but each have a single route to a unique client > ip address. > > This is a fairly reasonable use-case, as a single L2TP daemon can be > terminating thousands of client connections on a single tunnel, and a > tunnel flap will require tearing down all these interfaces. I'll work on > bisecting it, but if someone has any ideas of the source, I'd appreciate > hearing about it. > > -ben > -- > 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 -- 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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