From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sfi-mx-3.v28.ch3.sourceforge.com ([172.29.28.123] helo=mx.sourceforge.net) by h25xhf1.ch3.sourceforge.com with esmtp (Exim 4.69) (envelope-from ) id 1Ld40E-0006I9-UN for user-mode-linux-devel@lists.sourceforge.net; Fri, 27 Feb 2009 14:47:50 +0000 Received: from mail.scgiservices.com ([70.102.159.64]) by 3b2kzd1.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.69) id 1Ld405-0006mz-Jb for user-mode-linux-devel@lists.sourceforge.net; Fri, 27 Feb 2009 14:47:50 +0000 Received: from localhost (localhost [127.0.0.1]) by mail.scgiservices.com (Postfix) with ESMTP id D0A6C34044 for ; Fri, 27 Feb 2009 06:32:04 -0800 (PST) Received: from mail.scgiservices.com ([127.0.0.1]) by localhost (mail.scgiservices.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id yf3NGTUS1dOM for ; Fri, 27 Feb 2009 06:32:04 -0800 (PST) Received: from SCG3 (c-76-115-211-35.hsd1.or.comcast.net [76.115.211.35]) by mail.scgiservices.com (Postfix) with ESMTPSA id 380FA3403F for ; Fri, 27 Feb 2009 06:32:04 -0800 (PST) From: "Anthony Brock" Date: Fri, 27 Feb 2009 06:32:07 -0800 Message-ID: <000301c998e8$2ae364f0$80aa2ed0$@com> MIME-Version: 1.0 Content-Language: en-us Subject: [uml-devel] page_mapcount(page) went negative List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: user-mode-linux-devel-bounces@lists.sourceforge.net To: 'uml-devel' One of my customer UML instances started crashing last night. It was originally running under a very old version of the kernel, so I upgraded to 2.6.28.7. However, we are still encountering the crashes. I've verified that the customer has not exhausted their disk space, but the error seems to indicate something related to memory: Eeek! page_mapcount(page) went negative! (-1) page pfn = 1261 page->flags = 0 page->count = 2 page->mapping = 00000000 vma->vm_ops = 0x0 Kernel panic - not syncing: Kernel mode signal 4 EIP: 0073:[<40388868>] CPU: 0 Not tainted ESP: 007b:bfa7f060 EFLAGS: 00000246 Not tainted EAX: ffffffda EBX: 00000007 ECX: 080a3190 EDX: 00000000 ESI: 00000000 EDI: 00000000 EBP: bfa7fff8 DS: 007b ES: 007b 081fdbb4: [<0806a327>] show_regs+0xc4/0xc9 081fdbe0: [<08059a16>] panic_exit+0x25/0x3b 081fdbf4: [<0808411b>] notifier_call_chain+0x27/0x4c 081fdc1c: [<0808416e>] atomic_notifier_call_chain+0x15/0x17 081fdc2c: [<081984b1>] panic+0x4c/0xd2 081fdc48: [<080593cf>] relay_signal+0x31/0x6c 081fdc68: [<080650a2>] sig_handler_common+0x61/0x70 081fdce0: [<080651ca>] sig_handler+0x31/0x3d 081fdcec: [<08065363>] handle_signal+0x4f/0x7d 081fdd0c: [<08066a0b>] hard_handler+0xf/0x14 081fdd1c: [] _etext+0xf7e64328/0x0 It appears to be very repeatable at the moment as the crashes are occurring within a few minutes of boot. I noticed a similar bug report in the archives for kernel version 2.6.24. Is this a known issue? If so, is there a work-around? What additional information should I supply? I can supply the text from the earlier kernel version if that might help. Any help is appreciated! Tony ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel