From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755791Ab0IWRC1 (ORCPT ); Thu, 23 Sep 2010 13:02:27 -0400 Received: from fanny.its.uu.se ([130.238.4.241]:10928 "EHLO fanny.its.uu.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754499Ab0IWRCZ (ORCPT ); Thu, 23 Sep 2010 13:02:25 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <19611.34846.813757.309183@pilspetsen.it.uu.se> Date: Thu, 23 Sep 2010 19:02:22 +0200 From: Mikael Pettersson To: sparclinux@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: [2.6.36-rc regression] occasional complete system hangs on sparc64 SMP X-Mailer: VM 7.17 under Emacs 20.7.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On my Sun Blade 2500 (2 CPUs), post 2.6.35 kernels sometimes hang completely without visible messages on either the console or in the kernel logs. The first two times (with -rc1 or -rc3) it happended during gcc bootstraps + regression test runs, today (with -rc4) it happended while compiling the 2.6.36-rc5 kernel. It's very sporadic, perhaps one of ten boots will eventually hang like this. With 2.6.35 the machine is rock solid. The 2.6.36-rc kernels do appear to be solid on a UP Ultra5, but that one no longer does any gcc builds or tests, only kernel builds. Any ideas, or do I have to try to bisect this? /Mikael