From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: Re: [RFC PATCH] net: persistent device name bitmaps for faster name allocation Date: Fri, 20 Nov 2009 16:57:02 -0800 Message-ID: <20091120165702.2b337e46@nehalam> References: <200911210237.25855.opurdila@ixiacom.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: Octavian Purdila Return-path: Received: from mail.vyatta.com ([76.74.103.46]:33691 "EHLO mail.vyatta.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751652AbZKUA5R (ORCPT ); Fri, 20 Nov 2009 19:57:17 -0500 In-Reply-To: <200911210237.25855.opurdila@ixiacom.com> Sender: netdev-owner@vger.kernel.org List-ID: On Sat, 21 Nov 2009 02:37:25 +0200 Octavian Purdila 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". --