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Date: Thu, 8 Apr 2010 23:00:36 +0200 From: Borislav Petkov <bp@...en8.de> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>, Rik van Riel <riel@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>, Minchan Kim <minchan.kim@...il.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Lee Schermerhorn <Lee.Schermerhorn@...com>, Nick Piggin <npiggin@...e.de>, Andrea Arcangeli <aarcange@...hat.com>, Hugh Dickins <hugh.dickins@...cali.co.uk>, sgunderson@...foot.com, hannes@...xchg.org Subject: Re: [PATCH -v2] rmap: make anon_vma_prepare link in all the anon_vmas of a mergeable VMA From: Linus Torvalds <torvalds@...ux-foundation.org> 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] [<ffffffff81037ea8>] warn_slowpath_common+0x7c/0x94 [ 55.815362] [<ffffffff81037f17>] warn_slowpath_fmt+0x41/0x43 [ 55.815391] [<ffffffff810b856a>] handle_mm_fault+0x43/0x66a [ 55.815420] [<ffffffff8101f392>] do_page_fault+0x30b/0x32d [ 55.815452] [<ffffffff810615ce>] ? put_lock_stats+0xe/0x27 [ 55.815483] [<ffffffff81062a55>] ? lock_release_holdtime+0x104/0x109 [ 55.815518] [<ffffffff813f93e3>] ? error_sti+0x5/0x6 [ 55.815553] [<ffffffff813f7dd2>] ? trace_hardirqs_off_thunk+0x3a/0x3c [ 55.815585] [<ffffffff813f91ff>] 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] [<ffffffff81037ea8>] warn_slowpath_common+0x7c/0x94 [ 60.802191] [<ffffffff81037f17>] warn_slowpath_fmt+0x41/0x43 [ 60.802203] [<ffffffff810b856a>] handle_mm_fault+0x43/0x66a [ 60.802213] [<ffffffff8101f392>] do_page_fault+0x30b/0x32d [ 60.802225] [<ffffffff810615ce>] ? put_lock_stats+0xe/0x27 [ 60.802235] [<ffffffff81062a55>] ? lock_release_holdtime+0x104/0x109 [ 60.802268] [<ffffffff813f93e3>] ? error_sti+0x5/0x6 [ 60.802279] [<ffffffff813f7dd2>] ? trace_hardirqs_off_thunk+0x3a/0x3c [ 60.802290] [<ffffffff813f91ff>] 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] [<ffffffff81037ea8>] warn_slowpath_common+0x7c/0x94 [ 92.124002] [<ffffffff81037ed4>] warn_slowpath_null+0x14/0x16 [ 92.124031] [<ffffffff8102d5d8>] add_preempt_count+0x9c/0xcb [ 92.124061] [<ffffffff813f7ee9>] _raw_spin_lock_nest_lock+0x21/0x7a [ 92.124090] [<ffffffff810bc079>] ? mm_take_all_locks+0xf9/0x150 [ 92.124118] [<ffffffff810bc079>] mm_take_all_locks+0xf9/0x150 [ 92.124146] [<ffffffff810cc48d>] ? do_mmu_notifier_register+0xd3/0x19d [ 92.124174] [<ffffffff810cc495>] do_mmu_notifier_register+0xdb/0x19d [ 92.124202] [<ffffffff810cc57c>] mmu_notifier_register+0x13/0x15 [ 92.124256] [<ffffffffa00c67e3>] kvm_dev_ioctl+0x2c8/0x495 [kvm] [ 92.124318] [<ffffffff810e24ff>] vfs_ioctl+0x32/0xa6 [ 92.124357] [<ffffffff810e2a91>] do_vfs_ioctl+0x495/0x4db [ 92.124390] [<ffffffff813f93e3>] ? error_sti+0x5/0x6 [ 92.124425] [<ffffffff813f8fad>] ? retint_swapgs+0xe/0x13 [ 92.124458] [<ffffffff810e2b1e>] sys_ioctl+0x47/0x6a [ 92.124498] [<ffffffff810021db>] 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] [<ffffffff81037ea8>] warn_slowpath_common+0x7c/0x94 [ 92.214647] [<ffffffff81037f17>] warn_slowpath_fmt+0x41/0x43 [ 92.214683] [<ffffffff810b856a>] handle_mm_fault+0x43/0x66a [ 92.214718] [<ffffffff8101f392>] do_page_fault+0x30b/0x32d [ 92.214751] [<ffffffff810be3ab>] ? do_mmap_pgoff+0x290/0x2f3 [ 92.214787] [<ffffffff813f93e3>] ? error_sti+0x5/0x6 [ 92.214821] [<ffffffff81062b97>] ? trace_hardirqs_off_caller+0x1f/0xa9 [ 92.214857] [<ffffffff813f7dd2>] ? trace_hardirqs_off_thunk+0x3a/0x3c [ 92.214896] [<ffffffff813f91ff>] 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@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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