From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761024AbYEFMuU (ORCPT ); Tue, 6 May 2008 08:50:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753782AbYEFMuF (ORCPT ); Tue, 6 May 2008 08:50:05 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:53665 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752631AbYEFMuD (ORCPT ); Tue, 6 May 2008 08:50:03 -0400 Date: Tue, 6 May 2008 14:49:46 +0200 From: Ingo Molnar To: Jeff Chua Cc: Linus Torvalds , Linux Kernel Mailing List , Thomas Gleixner , "H. Peter Anvin" Subject: Re: Linux 2.6.26-rc1 - pgtable_32.c:178 pmd_bad Message-ID: <20080506124946.GA2146@elte.hu> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Jeff Chua wrote: > On Sun, May 4, 2008 at 3:38 AM, Linus Torvalds > wrote: > > > > So this merge window was somewhat rocky in the sense that there was a lot > > of arguments about it, but at the same time I at least personally think > > that from a technical angle, we had somewhat less scary stuff going on > > than has been almost the rule lately. > > I'm seeing this on a Dell 2950 (quad-core) during boot up, but not on > my IBM X60s (dual-core). This is using the lastest git 2.6.26-rc1. > > Just checking to see if this is a known bug before doing the bisect -- > more painful on the 2950 to reboot. > ------------[ cut here ]------------ > WARNING: at arch/x86/mm/pgtable_32.c:178 pmd_bad+0xa3/0xe3() > Modules linked in: > Pid: 1226, comm: khelper Not tainted 2.6.26-rc1 #4 > [] warn_on_slowpath+0x40/0x65 > [] kmap_atomic+0x11/0x14 > [] kunmap_atomic+0x4f/0x78 > [] get_page_from_freelist+0x33a/0x3da > [] __alloc_pages_internal+0x98/0x356 > [] kmap_atomic_prot+0x102/0x137 > [] kunmap_atomic+0x4f/0x78 > [] handle_mm_fault+0xb70/0xbba > [] pmd_bad+0xa3/0xe3 > [] follow_page+0x109/0x30a > [] get_user_pages+0x351/0x3c0 > [] get_arg_page+0x2b/0x7b > [] copy_strings+0xcd/0x173 > [] copy_strings_kernel+0x19/0x27 > [] do_execve+0xd9/0x18f > [] sys_execve+0x2a/0x4f > [] syscall_call+0x7/0xb > [] i8042_probe+0x29f/0x508 > [] kernel_execve+0x14/0x18 > [] ____call_usermodehelper+0x0/0x105 > [] ____call_usermodehelper+0xfb/0x105 > [] ____call_usermodehelper+0x0/0x105 > [] kernel_thread_helper+0x7/0x10 no, i have not seen this reported yet. we have an strace/ptrace fix pending in x86.git - but that should not affect khelper. Ingo