netdev - Re: [RFC PATCH] net: persistent device name bitmaps for faster name allocation

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Message-ID: <20091120165702.2b337e46@nehalam>
Date:	Fri, 20 Nov 2009 16:57:02 -0800
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Octavian Purdila <opurdila@...acom.com>
Cc:	netdev@...r.kernel.org
Subject: Re: [RFC PATCH] net: persistent device name bitmaps for faster name
 allocation

On Sat, 21 Nov 2009 02:37:25 +0200
Octavian Purdila <opurdila@...acom.com> wrote:

> This patch solves the current scalability issues of dev_name_alloc() by
> making the device name bitmap persistent. It is based on an idea
> suggested by Stephen Hemminger.

Still not sure that this much code is worth it. Even with 10000 ISP PPPoE links,
I can't see that bringing up a new PPP device would be the real bottleneck
except in the case of some benchmark that starts them all at once. Even TPC-C
benchmarks have a "warm up period".

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