From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932315AbXCWQtf (ORCPT ); Fri, 23 Mar 2007 12:49:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S934286AbXCWQte (ORCPT ); Fri, 23 Mar 2007 12:49:34 -0400 Received: from main.gmane.org ([80.91.229.2]:58452 "EHLO ciao.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934281AbXCWQtd (ORCPT ); Fri, 23 Mar 2007 12:49:33 -0400 X-Injected-Via-Gmane: http://gmane.org/ To: linux-kernel@vger.kernel.org From: Parag Warudkar Subject: Re: [rfc][patch] queued spinlocks (i386) Date: Fri, 23 Mar 2007 16:48:56 +0000 (UTC) Message-ID: References: <20070323085910.GA11577@wotan.suse.de> <20070323100418.GA30740@elte.hu> <20070323101042.GD11577@wotan.suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: main.gmane.org User-Agent: Loom/3.14 (http://gmane.org/) X-Loom-IP: 68.60.176.179 (Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.3) Gecko/20070309 Firefox/2.0.0.3) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Nick Piggin suse.de> writes: > > On Fri, Mar 23, 2007 at 11:04:18AM +0100, Ingo Molnar wrote: > > > > * Nick Piggin suse.de> wrote: > > > > > Implement queued spinlocks for i386. [...] > > > > isnt this patented by MS? (which might not worry you SuSE/Novell guys, > > but it might be a worry for the rest of the world > > I never thought a FIFO queue would be patentable. > > Do you have a reference to the patent number? > The ReactOS guys none the less, seem to have implemented queued spin locks - http://www.reactos.org/en/newsletter_10.html (see the HAL section.) Now I haven't looked at the code to see if they are different from what MS has patented but given that it's a clone of Windows, one would think at least from the behavioral pov they are similar? Parag