Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751836Ab2HDFQO (ORCPT ); Sat, 4 Aug 2012 01:16:14 -0400 Received: from mail.skyhub.de ([78.46.96.112]:38170 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751059Ab2HDFQN (ORCPT ); Sat, 4 Aug 2012 01:16:13 -0400 Date: Sat, 4 Aug 2012 07:16:08 +0200 From: Borislav Petkov To: "Pandita, Vikram" Cc: Kay Sievers , linux-omap , linux-arm-kernel@lists.infradead.org, Venu Byravarasu , "gregkh@linuxfoundation.org" , "linux-kernel@vger.kernel.org" , Mike Turquette , Vimarsh Zutshi Subject: Re: [PATCH v2] printk: add option to print cpu id Message-ID: <20120804051608.GB6728@liondog.tnic> Mail-Followup-To: Borislav Petkov , "Pandita, Vikram" , Kay Sievers , linux-omap , linux-arm-kernel@lists.infradead.org, Venu Byravarasu , "gregkh@linuxfoundation.org" , "linux-kernel@vger.kernel.org" , Mike Turquette , Vimarsh Zutshi References: <1343985378-22330-1-git-send-email-vikram.pandita@ti.com> <20120803104212.GA6936@x1.osrc.amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1319 Lines: 32 On Fri, Aug 03, 2012 at 09:46:15AM -0700, Pandita, Vikram wrote: > I mostly work with ARM Soc - specifically on OMAP. SMP multi core > systems in ARM-v7 world started to show up only few years back - > unlike x86 world. This is exactly the thing: other SMP vendors have made it so far without emitting which core is doing what in dmesg. > ARM systems are a bit unique when it comes to security( read trust > zone ), and handling of FIQ's. Most of the ARM cortex-A series SoC's > out there have some kind of affinity to CPU0 being the master. One use > case has been, it has helped to know with this printk logging, if such > constraints are honored. > > Sometimes, tracking of some lockup cases between cpu's because of bad > code has also been helpful with this logging support. For now i will > post v3 of the patch and add arm-list and linux-omap list, and there > might be users there can benefit. Right, so if arm people need this thing, why not make it arm-only? I still fail to see the need for this (... at all, actually). Thanks. -- Regards/Gruss, Boris. -- 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/