Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756307AbZKENVK (ORCPT ); Thu, 5 Nov 2009 08:21:10 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755971AbZKENVK (ORCPT ); Thu, 5 Nov 2009 08:21:10 -0500 Received: from mx.logic.tuwien.ac.at ([128.130.175.19]:53927 "EHLO mx.logic.tuwien.ac.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755867AbZKENVI (ORCPT ); Thu, 5 Nov 2009 08:21:08 -0500 Date: Thu, 5 Nov 2009 14:21:09 +0100 To: Minchan Kim Cc: KAMEZAWA Hiroyuki , KOSAKI Motohiro , linux-kernel@vger.kernel.org, linux-mm Subject: Re: OOM killer, page fault Message-ID: <20091105132109.GA12676@gamma.logic.tuwien.ac.at> References: <20091030063216.GA30712@gamma.logic.tuwien.ac.at> <20091102005218.8352.A69D9226@jp.fujitsu.com> <20091102135640.93de7c2a.minchan.kim@barrios-desktop> <28c262360911012300h4535118ewd65238c746b91a52@mail.gmail.com> <20091102155543.E60E.A69D9226@jp.fujitsu.com> <20091102140216.02567ff8.kamezawa.hiroyu@jp.fujitsu.com> <20091102141917.GJ2116@gamma.logic.tuwien.ac.at> <28c262360911020640k3f9dfcdct2cac6cc1d193144d@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <28c262360911020640k3f9dfcdct2cac6cc1d193144d@mail.gmail.com> User-Agent: Mutt/1.5.18 (2008-05-17) From: Norbert Preining Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3229 Lines: 74 Hi Kim, hi all, (still please Cc) sorry for the late reply. I have two news, one good and one bad: The good being that I can reproduce the bug by running VirtualBox with some W7 within. Anyway, I don't have a trace or better debug due to the bad news: Both 2.6.32-rc5 and 2.6.32-rc6 do *not* boot with the patch below. Don't ask me why, please, and I don't have a serial/net console so that I can tell you more, but the booting hangs badly at: [ 6.657492] usb 4-1: Product: Globetrotter HSDPA Modem [ 6.657494] usb 4-1: Manufacturer: Option N.V. [ 6.657496] usb 4-1: SerialNumber: Serial Number [ 6.657558] usb 4-1: configuration #1 chosen from 1 choice [ 6.837364] input: PS/2 Mouse as /devices/platform/i8042/serio2/input/input6 [ 6.853693] input: AlpsPS/2 ALPS GlidePoint as /devices/platform/i8042/serio2/input/input7 Normally it continues like that, but with the patch below it hangs here and does not continue. I need to Sysrq-s/u/b out of it. [ 6.904119] usb 8-2: new full speed USB device using uhci_hcd and address 2 [ 7.075524] usb 8-2: New USB device found, idVendor=044e, idProduct=3017 > diff --git a/mm/memory.c b/mm/memory.c > index 7e91b5f..47e4b15 100644 > --- a/mm/memory.c > +++ b/mm/memory.c > @@ -2713,7 +2713,11 @@ static int __do_fault(struct mm_struct *mm, > struct vm_area_struct *vma, > vmf.page = NULL; > > ret = vma->vm_ops->fault(vma, &vmf); > - if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE))) > + if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE))) { > + printk(KERN_DEBUG "vma->vm_ops->fault : 0x%lx\n", > vma->vm_ops->fault); > + WARN_ON(1); > + > + } > return ret; > > if (unlikely(PageHWPoison(vmf.page))) { I know it sounds completely crazy, the patch only does harmless things afais. But I tried it. Several times. rc6+patch never did boot, while rc5 without path did boot. Then I patched it into -rc5, recompiled, and boom, no boot. booting into .31.5, recompiling rc6 and rc5 without that patch and suddenly rc6 boots (and I am sure rc5, too). Sorry that I cannot give more infos, please let me know what else I can do. Ah yes, I can reproduce the original strange bug with oom killer! Best wishes Norbert ------------------------------------------------------------------------------- Dr. Norbert Preining Associate Professor JAIST Japan Advanced Institute of Science and Technology preining@jaist.ac.jp Vienna University of Technology preining@logic.at Debian Developer (Debian TeX Task Force) preining@debian.org gpg DSA: 0x09C5B094 fp: 14DF 2E6C 0307 BE6D AD76 A9C0 D2BF 4AA3 09C5 B094 ------------------------------------------------------------------------------- MELTON CONSTABLE (n.) A patent anti-wrinkle cream which policemen wear to keep themselves looking young. --- Douglas Adams, The Meaning of Liff -- 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/