From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stanislav Meduna Subject: Re: BUG: spinlock trylock failure on UP - reverting timer patches helps Date: Fri, 18 Apr 2014 00:55:19 +0200 Message-ID: <53505BD7.9050004@meduna.org> References: <534C3606.7010206@meduna.org> <534C731F.1050406@meduna.org> <534DADF1.6060608@meduna.org> <53500184.4050309@meduna.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Linux ARM Kernel , "linux-kernel@vger.kernel.org" , bigeasy@linutronix.de, Steven Rostedt , Thomas Gleixner To: "linux-rt-users@vger.kernel.org" , triplesquarednine@gmail.com Return-path: Received: from www.meduna.org ([92.240.244.38]:39364 "EHLO meduna.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750928AbaDQWz3 (ORCPT ); Thu, 17 Apr 2014 18:55:29 -0400 In-Reply-To: <53500184.4050309@meduna.org> Sender: linux-rt-users-owner@vger.kernel.org List-ID: On 17.04.2014 18:29, Stanislav Meduna wrote: > Note: the bug goes away reverting the very same patches that are > helping the Jordan's problms. I did follow > > http://www.spinics.net/lists/linux-rt-users/msg11639.html > > and no BUG while booting anymore. I'll try to let it run some > more time. Erm.. nope # (cat /proc/meminfo ; cat /proc/meminfo) | grep KernelStack KernelStack: 5920 kB KernelStack: 5928 kB # (cat /proc/meminfo ; cat /proc/meminfo) | grep KernelStack KernelStack: 5952 kB KernelStack: 5960 kB maybe interrupt nesting ad nauseum? How does one debug such issues? It is possible that my previous posting was also caused by this - disregard, I'll post again if the problem persists. Jordan, could you check whether your kernel stack remains stable with only the 3 patches reverted? Thanks -- Stano From mboxrd@z Thu Jan 1 00:00:00 1970 From: stano@meduna.org (Stanislav Meduna) Date: Fri, 18 Apr 2014 00:55:19 +0200 Subject: BUG: spinlock trylock failure on UP - reverting timer patches helps In-Reply-To: <53500184.4050309@meduna.org> References: <534C3606.7010206@meduna.org> <534C731F.1050406@meduna.org> <534DADF1.6060608@meduna.org> <53500184.4050309@meduna.org> Message-ID: <53505BD7.9050004@meduna.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 17.04.2014 18:29, Stanislav Meduna wrote: > Note: the bug goes away reverting the very same patches that are > helping the Jordan's problms. I did follow > > http://www.spinics.net/lists/linux-rt-users/msg11639.html > > and no BUG while booting anymore. I'll try to let it run some > more time. Erm.. nope # (cat /proc/meminfo ; cat /proc/meminfo) | grep KernelStack KernelStack: 5920 kB KernelStack: 5928 kB # (cat /proc/meminfo ; cat /proc/meminfo) | grep KernelStack KernelStack: 5952 kB KernelStack: 5960 kB maybe interrupt nesting ad nauseum? How does one debug such issues? It is possible that my previous posting was also caused by this - disregard, I'll post again if the problem persists. Jordan, could you check whether your kernel stack remains stable with only the 3 patches reverted? Thanks -- Stano