From mboxrd@z Thu Jan  1 00:00:00 1970
From: Greg KH <greg@kroah.com>
Subject: Re: [PATCH 1/3] sysfs directory scaling: rbtree for dirent name
	lookups
Date: Tue, 3 Nov 2009 09:56:54 -0800
Message-ID: <20091103175654.GA27222@kroah.com>
References: <20091101163130.GA7911@kvack.org> <20091103035058.GA19515@kroah.com> <4AEFCA49.4020305@gmail.com> <20091103160715.GD23857@kroah.com> <20091103164550.GM8227@kvack.org>
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Cc: Eric Dumazet <eric.dumazet@gmail.com>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Octavian Purdila <opurdila@ixiacom.com>,
	netdev@vger.kernel.org, Cosmin Ratiu <cratiu@ixiacom.com>,
	linux-kernel@vger.kernel.org
To: Benjamin LaHaise <bcrl@lhnet.ca>
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On Tue, Nov 03, 2009 at 11:45:50AM -0500, Benjamin LaHaise wrote:
> On Tue, Nov 03, 2009 at 08:07:15AM -0800, Greg KH wrote:
> > But registering 20000 devices is a far different problem from using
> > those 20000 devices :)
> 
> Registering 20,000 devices *is* a real world problem (I'm actually aiming 
> for 100,000, as that's what roughly fits in a single 10Gbps link -- something 
> that a mid range system can now route).  When an edge router comes up from 
> reboot, or after a link has been down, the rate at which customers connect 
> is important -- too slow, and you get a pile of support calls from customers 
> complaining that their connection is down.  Because of the data structures 
> used, there isn't even any improvement from an SMP system, so this needs 
> to be addressed directly.

Ok, how long are we talking about here?

thanks,

greg k-h