From mboxrd@z Thu Jan 1 00:00:00 1970 From: bp@alien8.de (Borislav Petkov) Date: Sat, 4 Aug 2012 07:16:08 +0200 Subject: [PATCH v2] printk: add option to print cpu id In-Reply-To: References: <1343985378-22330-1-git-send-email-vikram.pandita@ti.com> <20120803104212.GA6936@x1.osrc.amd.com> Message-ID: <20120804051608.GB6728@liondog.tnic> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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.