From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161338AbXAHQTG (ORCPT ); Mon, 8 Jan 2007 11:19:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161337AbXAHQTG (ORCPT ); Mon, 8 Jan 2007 11:19:06 -0500 Received: from sj-iport-3-in.cisco.com ([171.71.176.72]:30734 "EHLO sj-iport-3.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161338AbXAHQTE (ORCPT ); Mon, 8 Jan 2007 11:19:04 -0500 X-IronPort-AV: i="4.13,159,1167638400"; d="scan'208"; a="455797760:sNHT194173840" To: kvm-devel , linux-kernel@vger.kernel.org Subject: guest crash on 2.6.20-rc4 X-Message-Flag: Warning: May contain useful information From: Roland Dreier Date: Mon, 08 Jan 2007 08:18:57 -0800 Message-ID: User-Agent: Gnus/5.1007 (Gnus v5.10.7) XEmacs/21.4.19 (linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-OriginalArrivalTime: 08 Jan 2007 16:18:58.0445 (UTC) FILETIME=[B36BABD0:01C73340] Authentication-Results: sj-dkim-2; header.From=rdreier@cisco.com; dkim=pass ( sig from cisco.com/sjdkim2002 verified; ); Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I'm running a 64-bit Fedora 6 install as a guest on a host running 2.6.20-rc4 with the kvm-10 userspace release. The CPU is a Xeon 5160 and I have 6 GB of RAM. The guest is given 512 MB of memory. I left the guest idle overnight, and the makewhatis cron job seems to have triggered this: Unable to handle kernel paging request at ffff81000ba04000 RIP: [] clear_page+0x16/0x44 PGD 8063 PUD 9063 PMD 800000000ba001e3 PTE aad8a7d881d984d9 Oops: 0003 [1] SMP last sysfs file: /block/hda/removable CPU 0 Modules linked in: autofs4 hidp nfs lockd fscache nfs_acl rfcomm l2cap bluetooth sunrpc ip_conntrack_netbios_ns ipt_REJECT xt_state ip_conntrack nfnetlink iptable_filter ip_tables ip6t_REJECT xt_tcpudp ip6table_filter ip6_tables x_tables dm_multipath video sbs i2c_ec i2c_core button battery asus_acpi ac ipv6 parport_pc lp parport floppy pcspkr ne2k_pci 8390 serio_raw ide_cd cdrom dm_snapshot dm_zero dm_mirror dm_mod ext3 jbd ehci_hcd ohci_hcd uhci_hcd Pid: 4687, comm: makewhatis Not tainted 2.6.18-1.2869.fc6 #1 RIP: 0010:[] [] clear_page+0x16/0x44 RSP: 0018:ffff810003e85c40 EFLAGS: 00010216 RAX: 0000000000000000 RBX: ffff8100012e9140 RCX: 000000000000003f RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff81000ba04000 RBP: 0000000000000001 R08: ffff81001fdc4d8e R09: 00000000000021e6 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8100012e9100 R13: ffff81000000b500 R14: ffff81000000c400 R15: 0000000000000001 FS: 00002aaaaaac6db0(0000) GS:ffffffff805e4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: ffff81000ba04000 CR3: 0000000003c05000 CR4: 00000000000006e0 Process makewhatis (pid: 4687, threadinfo ffff810003e84000, task ffff81001f3a77f0) Stack: ffffffff8020a632 ffff81000000c400 0000004400000000 ffff81000000c400 000284d000000000 0000000000000001 0000000000000001 00000000000084d0 ffff81000000c400 00000000000084d0 ffff81000000c400 ffff81001f3a77f0 Call Trace: Inexact backtrace: [] get_page_from_freelist+0x351/0x3c4 [] __alloc_pages+0x76/0x2c3 [] get_zeroed_page+0x21/0x74 [] __pud_alloc+0x14/0x90 [] copy_page_range+0x122/0x6c1 [] dup_fd+0x208/0x2a8 [] copy_process+0xd28/0x159d [] do_fork+0x69/0x163 [] _spin_lock_irqsave+0x9/0xe [] system_call+0x7e/0x83 [] ptregscall_common+0x67/0xac Code: 48 89 07 48 89 47 08 48 89 47 10 48 89 47 18 48 89 47 20 48 RIP [] clear_page+0x16/0x44 RSP CR2: ffff81000ba04000 I just let yum update the guest to the 2.6.18-1.2869.fc6 kernel, but I'm more suspicious of the MMU changes to kvm... I don't see anything come up in the host logs when this happens. Let me know if there is other debugging info that would be helpful. - R.