Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933572Ab0DHVIO (ORCPT ); Thu, 8 Apr 2010 17:08:14 -0400 Received: from mail.skyhub.de ([78.46.96.112]:60215 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758950Ab0DHVIK (ORCPT ); Thu, 8 Apr 2010 17:08:10 -0400 Date: Thu, 8 Apr 2010 23:00:36 +0200 From: Borislav Petkov To: Linus Torvalds Cc: KOSAKI Motohiro , Rik van Riel , Andrew Morton , Minchan Kim , Linux Kernel Mailing List , Lee Schermerhorn , Nick Piggin , Andrea Arcangeli , Hugh Dickins , sgunderson@bigfoot.com, hannes@cmpxchg.org Subject: Re: [PATCH -v2] rmap: make anon_vma_prepare link in all the anon_vmas of a mergeable VMA Message-ID: <20100408210035.GA25834@a1.tnic> Mail-Followup-To: Borislav Petkov , Linus Torvalds , KOSAKI Motohiro , Rik van Riel , Andrew Morton , Minchan Kim , Linux Kernel Mailing List , Lee Schermerhorn , Nick Piggin , Andrea Arcangeli , Hugh Dickins , sgunderson@bigfoot.com, hannes@cmpxchg.org References:

<20100408101925.FB9F.A69D9226@jp.fujitsu.com> <20100408054707.GA9299@a1.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6066 Lines: 94 From: Linus Torvalds Date: Thu, Apr 08, 2010 at 07:11:11AM -0700 > [ The patch below also makes it warn once and return SIGBUS for the case > where there is no anon_vma. I decided I still want to hear about it if > there might be some path that tries to insert a vma on its own ] And this happens quite often - I changed the WARN_ONCE to WARN and can't start kvm, iceowl (mozilla calendar) and the console-kit-daemon craps up upon boot too: [ 55.814570] ------------[ cut here ]------------ [ 55.814623] WARNING: at mm/memory.c:3110 handle_mm_fault+0x43/0x66a() [ 55.814648] Hardware name: System Product Name [ 55.814671] Mapping with no anon_vma [ 55.814693] Modules linked in: powernow_k8 cpufreq_ondemand cpufreq_powersave cpufreq_userspace freq_table cpufreq_conservative binfmt_misc kvm_amd kvm ipv6 vfat fat dm_crypt dm_mod 8250_pnp 8250 edac_core ohci_hcd serial_core k10temp pcspkr [ 55.815249] Pid: 1936, comm: console-kit-dae Not tainted 2.6.34-rc3-00290-g2156db9-dirty #8 [ 55.815290] Call Trace: [ 55.815327] [] warn_slowpath_common+0x7c/0x94 [ 55.815362] [] warn_slowpath_fmt+0x41/0x43 [ 55.815391] [] handle_mm_fault+0x43/0x66a [ 55.815420] [] do_page_fault+0x30b/0x32d [ 55.815452] [] ? put_lock_stats+0xe/0x27 [ 55.815483] [] ? lock_release_holdtime+0x104/0x109 [ 55.815518] [] ? error_sti+0x5/0x6 [ 55.815553] [] ? trace_hardirqs_off_thunk+0x3a/0x3c [ 55.815585] [] page_fault+0x1f/0x30 [ 55.815613] ---[ end trace fa59f67cbfeeca44 ]--- [ 60.801651] ------------[ cut here ]------------ [ 60.801672] WARNING: at mm/memory.c:3110 handle_mm_fault+0x43/0x66a() [ 60.801681] Hardware name: System Product Name [ 60.801689] Mapping with no anon_vma [ 60.801702] Modules linked in: powernow_k8 cpufreq_ondemand cpufreq_powersave cpufreq_userspace freq_table cpufreq_conservative binfmt_misc kvm_amd kvm ipv6 vfat fat dm_crypt dm_mod 8250_pnp 8250 edac_core ohci_hcd serial_core k10temp pcspkr [ 60.802156] Pid: 2008, comm: iceowl-bin Tainted: G W 2.6.34-rc3-00290-g2156db9-dirty #8 [ 60.802169] Call Trace: [ 60.802181] [] warn_slowpath_common+0x7c/0x94 [ 60.802191] [] warn_slowpath_fmt+0x41/0x43 [ 60.802203] [] handle_mm_fault+0x43/0x66a [ 60.802213] [] do_page_fault+0x30b/0x32d [ 60.802225] [] ? put_lock_stats+0xe/0x27 [ 60.802235] [] ? lock_release_holdtime+0x104/0x109 [ 60.802268] [] ? error_sti+0x5/0x6 [ 60.802279] [] ? trace_hardirqs_off_thunk+0x3a/0x3c [ 60.802290] [] page_fault+0x1f/0x30 [ 60.802305] ---[ end trace fa59f67cbfeeca45 ]--- [ 92.123350] ------------[ cut here ]------------ [ 92.123402] WARNING: at kernel/sched.c:3555 add_preempt_count+0x9c/0xcb() [ 92.123428] Hardware name: System Product Name [ 92.123451] Modules linked in: powernow_k8 cpufreq_ondemand cpufreq_powersave cpufreq_userspace freq_table cpufreq_conservative binfmt_misc kvm_amd kvm ipv6 vfat fat dm_crypt dm_mod 8250_pnp 8250 edac_core ohci_hcd serial_core k10temp pcspkr [ 92.123902] Pid: 2111, comm: kvm Tainted: G W 2.6.34-rc3-00290-g2156db9-dirty #8 [ 92.123940] Call Trace: [ 92.123973] [] warn_slowpath_common+0x7c/0x94 [ 92.124002] [] warn_slowpath_null+0x14/0x16 [ 92.124031] [] add_preempt_count+0x9c/0xcb [ 92.124061] [] _raw_spin_lock_nest_lock+0x21/0x7a [ 92.124090] [] ? mm_take_all_locks+0xf9/0x150 [ 92.124118] [] mm_take_all_locks+0xf9/0x150 [ 92.124146] [] ? do_mmu_notifier_register+0xd3/0x19d [ 92.124174] [] do_mmu_notifier_register+0xdb/0x19d [ 92.124202] [] mmu_notifier_register+0x13/0x15 [ 92.124256] [] kvm_dev_ioctl+0x2c8/0x495 [kvm] [ 92.124318] [] vfs_ioctl+0x32/0xa6 [ 92.124357] [] do_vfs_ioctl+0x495/0x4db [ 92.124390] [] ? error_sti+0x5/0x6 [ 92.124425] [] ? retint_swapgs+0xe/0x13 [ 92.124458] [] sys_ioctl+0x47/0x6a [ 92.124498] [] system_call_fastpath+0x16/0x1b [ 92.124527] ---[ end trace fa59f67cbfeeca46 ]--- [ 92.213834] ------------[ cut here ]------------ [ 92.213888] WARNING: at mm/memory.c:3110 handle_mm_fault+0x43/0x66a() [ 92.213913] Hardware name: System Product Name [ 92.213937] Mapping with no anon_vma [ 92.213959] Modules linked in: powernow_k8 cpufreq_ondemand cpufreq_powersave cpufreq_userspace freq_table cpufreq_conservative binfmt_misc kvm_amd kvm ipv6 vfat fat dm_crypt dm_mod 8250_pnp 8250 edac_core ohci_hcd serial_core k10temp pcspkr [ 92.214529] Pid: 2111, comm: kvm Tainted: G W 2.6.34-rc3-00290-g2156db9-dirty #8 [ 92.214571] Call Trace: [ 92.214612] [] warn_slowpath_common+0x7c/0x94 [ 92.214647] [] warn_slowpath_fmt+0x41/0x43 [ 92.214683] [] handle_mm_fault+0x43/0x66a [ 92.214718] [] do_page_fault+0x30b/0x32d [ 92.214751] [] ? do_mmap_pgoff+0x290/0x2f3 [ 92.214787] [] ? error_sti+0x5/0x6 [ 92.214821] [] ? trace_hardirqs_off_caller+0x1f/0xa9 [ 92.214857] [] ? trace_hardirqs_off_thunk+0x3a/0x3c [ 92.214896] [] page_fault+0x1f/0x30 [ 92.214928] ---[ end trace fa59f67cbfeeca47 ]--- -- Regards/Gruss, Boris. -- 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/