Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757067AbZD0Ojn (ORCPT ); Mon, 27 Apr 2009 10:39:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756710AbZD0Ojc (ORCPT ); Mon, 27 Apr 2009 10:39:32 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122]:36462 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756446AbZD0Ojb (ORCPT ); Mon, 27 Apr 2009 10:39:31 -0400 Date: Mon, 27 Apr 2009 10:39:29 -0400 (EDT) From: Steven Rostedt X-X-Sender: rostedt@gandalf.stny.rr.com To: Andi Kleen cc: Huang Ying , Robert Richter , Ingo Molnar , "H. Peter Anvin" , Thomas Gleixner , "linux-kernel@vger.kernel.org" , Hidetoshi Seto Subject: Re: Re-implement MCE log ring buffer as per-CPU ring buffer In-Reply-To: <49F5646F.4000305@linux.intel.com> Message-ID: References: <1240391484.6842.474.camel@yhuang-dev.sh.intel.com> <20090422092259.GC18226@elte.hu> <20090422101600.GL3226@erda.amd.com> <1240553210.6842.871.camel@yhuang-dev.sh.intel.com> <20090424100943.GJ27264@erda.amd.com> <1240818596.6842.1001.camel@yhuang-dev.sh.intel.com> <49F5646F.4000305@linux.intel.com> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1820 Lines: 47 On Mon, 27 Apr 2009, Andi Kleen wrote: > Huang Ying wrote: > > On Fri, 2009-04-24 at 21:36 +0800, Steven Rostedt wrote: > > > On Fri, 24 Apr 2009, Robert Richter wrote: > > > > > It seems that ring_buffer is not NMI-safe, while mcelog buffer will be > > > > > used in NMI context and interrupt context. When will ring_buffer to be > > > > > NMI-safe? > > > > You can use it in nmi context with separate read and write > > > > buffers. See this patch description: > > > > 6dad828b76c7224a22ddc9ce7aa495d994f03b31 > > > > > > > > Not sure if somebody will make the ring_buffer non-locking. > > > It already is ;-) > > > > > > I've put in for a patent application on the algorithm so I must wait till > > > it is processed before I can release the code. > > > > When will it be merged by mainline kernel? Do you have a plan? > > Patent applications tend to be measured in years. Also I'm not sure > we really want patented algorithms in the kernel anyways if it can > be avoided. So the patent probably makes it impractical to use this > thing at all. Once it is filed then I can post it, I do not need to wait till it is done. And what the hell do you mean about not using patents?? We have several patents in the kernel. Have you ever heard of the Open Invention Network? http://www.openinventionnetwork.com/ This patent will go under the Open Source patent pool to help protect against patent attacks against Linux, et. al. Yes, the Open Source community can file their own patents. The more patents owned by the Open Source community, the better. -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/