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Message-ID: <20091103175654.GA27222@kroah.com>
Date: Tue, 3 Nov 2009 09:56:54 -0800
From: Greg KH <greg@...ah.com>
To: Benjamin LaHaise <bcrl@...et.ca>
Cc: Eric Dumazet <eric.dumazet@...il.com>,
"Eric W. Biederman" <ebiederm@...ssion.com>,
Octavian Purdila <opurdila@...acom.com>,
netdev@...r.kernel.org, Cosmin Ratiu <cratiu@...acom.com>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] sysfs directory scaling: rbtree for dirent name
lookups
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
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