From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932136AbZHLHsH (ORCPT ); Wed, 12 Aug 2009 03:48:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754238AbZHLHsG (ORCPT ); Wed, 12 Aug 2009 03:48:06 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:57494 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753667AbZHLHsE (ORCPT ); Wed, 12 Aug 2009 03:48:04 -0400 Date: Wed, 12 Aug 2009 09:47:53 +0200 From: Robert Schwebel To: Juergen Beisert Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.arm.linux.org.uk, linux-hotplug@vger.kernel.org, Mel Gorman Subject: Re: Patch "page-allocator: preserve PFN ordering when __GFP_COLD is set" fails on my system Message-ID: <20090812074753.GL13320@pengutronix.de> References: <200908111830.03224.jbe@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <200908111830.03224.jbe@pengutronix.de> X-Sent-From: Pengutronix Entwicklungszentrum Nord - Hildesheim X-URL: http://www.pengutronix.de/ X-IRC: #ptxdist @freenode X-Accept-Language: de,en X-Accept-Content-Type: text/plain X-Impressum: Pengutronix - Linux Solutions for Science and Industry Handelsregister: Amtsgericht Hildesheim, HRA 2686 Peiner Strasse 6-8, 31137 Hildesheim, Germany Phone: +49-5121-206917-0 | Fax: +49-5121-206917-5555 Inhaber: Dipl.-Ing. Robert Schwebel X-Message-Flag: See Message Headers for Impressum X-Uptime: 09:47:05 up 6 days, 19:06, 14 users, load average: 2.14, 2.94, 1.98 User-Agent: Mutt/1.5.18 (2008-05-17) X-SA-Exim-Connect-IP: 2001:6f8:1178:2:215:17ff:fe12:23b0 X-SA-Exim-Mail-From: rsc@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Jürgen, adding the patch author to Cc: ... rsc On Tue, Aug 11, 2009 at 06:30:02PM +0200, Juergen Beisert wrote: > Hi, > > I get the following Ooops message when "udevadm" is running on an ARM S3C2440 > CPU based system: > > [...] > starting udevd...done > Unable to handle kernel paging request at virtual address e3540000 > pgd = c39d4000 > [e3540000] *pgd=00000000 > Internal error: Oops: 5 [#1] > Modules linked in: > CPU: 0 Not tainted (2.6.31-rc4-00296-ge084b2d-dirty #10) > PC is at strlen+0xc/0x20 > LR is at kobject_get_path+0x24/0xa4 > pc : [] lr : [] psr: a0000013 > sp : c39bdea0 ip : 00000005 fp : c029645b > r10: c02e0430 r9 : 00000000 r8 : c3802c60 > r7 : c001de30 r6 : 000000d0 r5 : 00000001 r4 : c001de30 > r3 : e3550001 r2 : e3540000 r1 : 000000d0 r0 : e3540000 > Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user > Control: c000717f Table: 339d4000 DAC: 00000015 > Process udevadm (pid: 325, stack limit = 0xc39bc270) > Stack: (0xc39bdea0 to 0xc39be000) > dea0: c001de28 00000003 c393d778 c399d000 c3802c60 c014dce0 c029645b c0112200 > dec0: c393d778 00000000 00000003 c393d780 c399d000 c0112400 00000000 00020001 > dee0: c0307fdc 00000000 c3950960 c027ddc3 c380cda0 c343b3d4 c3811e60 00000000 > df00: 00000000 c393d778 00000003 c3960520 c393d780 c02e0470 c3960538 c39bdf88 > df20: 00019cb0 c014dd80 c382db20 00000000 c3960538 c38ede7c 00000003 c014d464 > df40: c38ede7c c00bf224 c382db20 00019cb0 c39bdf88 00000004 00000003 c39bc000 > df60: 00000000 c0080bd8 c343b3d4 00000020 00000000 00000000 c382db20 00000004 > df80: c0022fa8 c0080d38 00000000 00000000 bead3250 00000000 00026d98 00000003 > dfa0: bead3250 c0022e00 00026d98 00000003 00000003 00019cb0 00000003 00000000 > dfc0: 00026d98 00000003 bead3250 00000004 00022a90 bead3678 00019cb0 00019cb0 > dfe0: 00022a94 bead3250 00018114 400d8f1c 40000010 00000003 00000000 00000000 > [] (strlen+0xc/0x20) from [] (kobject_get_path+0x24/0xa4) > [] (kobject_get_path+0x24/0xa4) from [] (dev_uevent+0x1dc/0x208) > [] (dev_uevent+0x1dc/0x208) from [] (kobject_uevent_env+0x18c/0x3a8) > [] (kobject_uevent_env+0x18c/0x3a8) from [] (store_uevent+0x74/0x88) > [] (store_uevent+0x74/0x88) from [] (dev_attr_store+0x20/0x28) > [] (dev_attr_store+0x20/0x28) from [] (sysfs_write_file+0x104/0x13c) > [] (sysfs_write_file+0x104/0x13c) from [] (vfs_write+0xb0/0x15c) > [] (vfs_write+0xb0/0x15c) from [] (sys_write+0x40/0x6c) > [] (sys_write+0x40/0x6c) from [] (ret_fast_syscall+0x0/0x2c) > Code: c02dbe78 e1a02000 ea000000 e2800001 (e5d03000) > ---[ end trace 4d391449ae70e71a ]--- > Segmentation fault > [...] > > This Oops does not occure in v2.6.31-rc4 and occures in v2.6.31-rc5. Bisected > to the commit: > > e084b2d95e48b31aa45f9c49ffc6cdae8bdb21d4 > "page-allocator: preserve PFN ordering when __GFP_COLD is set" > > But its curious: The same binary kernel still runs without this oops on an ARM > S3C2410 CPU. > > Regards, > Juergen > > -- > Pengutronix e.K. | Juergen Beisert | > Linux Solutions for Science and Industry | Phone: +49-8766-939 228 | > Vertretung Sued/Muenchen, Germany | Fax: +49-5121-206917-5555 | > Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de/ | > -- > 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/ > -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |