linux-kernel - [signal] divide error

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Message-ID: <20120910005629.GB27826@localhost>
Date:	Mon, 10 Sep 2012 08:56:29 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Al Viro <viro@...iv.linux.org.uk>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: [signal] divide error

FYI, yet another dmesg, hope it helps debugging :)

x86_64-randconfig-s284      b______b___b_BBBBBB

--
12:	  f411932  
13:	B c2865bb  2012-09-10 kvm-waimea   [    2.295689] double fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC 
14:	B 549bf9c  2012-09-10 kvm-inn      [    2.779554] double fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC 
15:	B 4e382ff  2012-09-10 kvm-inn      [    2.751103] double fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC 
16:	B 23ddf94  2012-09-10 kvm-stoakley [    3.470572] double fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC 
17:	B f117e2a  2012-09-10 kvm-inn      [    4.024677] divide error: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [update_sd_lb_stats find_busiest_group load_balance lock_acquire idle_balance __schedule schedule worker_thread rescuer_thread kthread retint_restore_args __init_kthread_worker gs_change]
18:	B a392720  2012-09-10 kvm-fat      [    2.739769] double fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC 
18:	B a392720  2012-09-10 kvm-inn      [    3.974984] double fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC 
18:	B a392720  2012-09-10 kvm-stoakley [    3.471390] double fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC 

[    4.022721] bus: 'serio': really_probe: probing driver atkbd with device serio1
[    4.023973] atkbd: probe of serio1 rejects match -19
[    4.024677] divide error: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
[    4.025627] Modules linked in:
[    4.026041] CPU 0 
[    4.026282] Pid: 21, comm: kworker/0:1 Not tainted 3.6.0-rc3-00186-gf117e2a #47 Bochs Bochs
[    4.026414] RIP: 0010:[<ffffffff810536e7>]  [<ffffffff810536e7>] update_sd_lb_stats+0x2a8/0x484
[    4.026414] RSP: 0018:ffff8800001dfac0  EFLAGS: 00010046
[    4.026414] RAX: 0000000000100000 RBX: ffff8800001dfcb0 RCX: 0000000000000000
[    4.026414] RDX: 0000000000000000 RSI: 00000000000000ff RDI: 0000000000000000
[    4.026414] RBP: ffff8800001dfb90 R08: ffff8800000812b8 R09: 0000000000000013
[    4.026414] R10: ffffffff813be9d0 R11: ffff88000ddd3240 R12: 0000000000000000
[    4.026414] R13: 0000000000000008 R14: ffff8800001dfba0 R15: ffff8800000812a0
[    4.026414] FS:  0000000000000000(0000) GS:ffff88000dc00000(0000) knlGS:0000000000000000
[    4.026414] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[    4.026414] CR2: 0000000000000000 CR3: 00000000013a5000 CR4: 00000000000006b0
[    4.026414] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    4.026414] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[    4.026414] Process kworker/0:1 (pid: 21, threadinfo ffff8800001de000, task ffff880000172000)
[    4.026414] Stack:
[    4.026414]  00000000001d3240 ffff8800000812b8 ffff8800001dfd4c 00000000001d3240
[    4.026414]  0000000000000001 0000000000000001 0000000000000000 0000000000000400
[    4.026414]  0000000000000001 0000000000000400 00000000ffffffff ffff8800001dfb20
[    4.026414] Call Trace:
[    4.026414]  [<ffffffff810538ef>] find_busiest_group+0x2c/0x1db
[    4.026414]  [<ffffffff81053b69>] load_balance+0xcb/0x5c5
[    4.026414]  [<ffffffff81061a2d>] ? lock_acquire+0xa6/0xb1
[    4.026414]  [<ffffffff81054273>] idle_balance+0x9c/0x111
[    4.026414]  [<ffffffff81239918>] __schedule+0x241/0x4bd
[    4.026414]  [<ffffffff81239c9e>] schedule+0x60/0x62
[    4.026414]  [<ffffffff810429ae>] worker_thread+0x21a/0x24b
[    4.026414]  [<ffffffff81042794>] ? rescuer_thread+0x17d/0x17d
[    4.026414]  [<ffffffff8104600f>] kthread+0x73/0x7b
[    4.026414]  [<ffffffff8123ce44>] kernel_thread_helper+0x4/0x10
[    4.026414]  [<ffffffff8123b3f4>] ? retint_restore_args+0x13/0x13
[    4.026414]  [<ffffffff81045f9c>] ? __init_kthread_worker+0x55/0x55
[    4.026414]  [<ffffffff8123ce40>] ? gs_change+0x13/0x13
[    4.026414] Code: 47 10 48 8b 15 3b b9 3a 00 48 3b 50 10 78 0b 8b 73 14 48 8b 3b e8 f8 fb ff ff 49 8b 57 10 48 8b 45 98 8b 4a 04 48 c1 e0 0a 31 d2 <48> f7 f1 48 8b 4d a0 48 89 45 90 31 c0 48 85 c9 74 09 48 8b 45 
[    4.026414] RIP  [<ffffffff810536e7>] update_sd_lb_stats+0x2a8/0x484
[    4.026414]  RSP <ffff8800001dfac0>

Thanks,
Fengguang

View attachment "dmesg-kvm-inn-19896-2012-09-10-08-47-33-3.6.0-rc3-00186-gf117e2a-47" of type "text/plain" (104543 bytes)

View attachment "config-3.6.0-rc3-00186-gf117e2a" of type "text/plain" (62454 bytes)