Re: x86/mce: machine check warning during poweroff

[Justin P. Mattock]

On 01/13/2012 01:24 PM, Andi Kleen wrote:
> > Yes, I think you're hitting the exact same thing.
> >
> > I *think* that what is going on is that we free some data structure
> > too early, and we didn't use to free them before.
>
> Assuming the problem is with the multiple devices (not fully sure):
>
> The redundant devices don't make much sense anyways, they are all
> mirrors of each other
> (state changes always affect all CPUs) Could just collapse down to a
> single device and symlink
> the others.
>
> -Andi

this showed up using no_console_suspend


  131.875143] usb 5-1: device descriptor read/64, error -110
[  140.599340] PM: Syncing filesystems ... done.
[  140.815981] PM: Preparing system for mem sleep
[  140.829117] Freezing user space processes ... (elapsed 0.01 seconds) 
done.
[  140.840150] Freezing remaining freezable tasks ...
[  147.079160] usb 5-1: device descriptor read/64, error -110
[  147.282166] usb 5-1: new full-speed USB device number 6 using uhci_hcd
[  157.686165] usb 5-1: device not accepting address 6, error -110
[  157.788183] usb 5-1: new full-speed USB device number 7 using uhci_hcd
[  160.849310]
[  160.849320] Freezing of tasks failed after 20.00 seconds (1 tasks 
refusing to freeze, wq_busy=0):
[  160.849460] khubd           D f5d90020     0    20      2 0x00000000
[  160.849471]  f5d95d50 00000046 f5d095d0 f5d90020 00000000 c16ec3c0 
bce8e78a 00000024
[  160.849488]  c16ec3c0 bce7b7f6 00000024 f60063c0 f5d09170 f5d95d20 
c120490b c1039aa6
[  160.849505]  00000000 00000046 c1721180 00000296 f5d95d70 f5d95d40 
c1465208 00000000
[  160.849521] Call Trace:
[  160.849538]  [<c120490b>] ? do_raw_spin_lock+0x3b/0xf0
[  160.849548]  [<c1039aa6>] ? lock_timer_base.isra.24+0x26/0x50
[  160.849558]  [<c1465208>] ? _raw_spin_lock_irqsave+0x58/0x70
[  160.849567]  [<c1204a4e>] ? do_raw_spin_unlock+0x4e/0x90
[  160.849574]  [<c1463c30>] schedule+0x30/0x50
[  160.849582]  [<c1461b7f>] schedule_timeout+0x10f/0x1f0
[  160.849589]  [<c10396f0>] ? usleep_range+0x40/0x40
[  160.849597]  [<c1463ae0>] wait_for_common+0xb0/0x120
[  160.849605]  [<c1053bb0>] ? try_to_wake_up+0x260/0x260
[  160.849614]  [<c1463bdd>] wait_for_completion_timeout+0xd/0x10
[  160.849624]  [<c13250e1>] usb_start_wait_urb+0xb1/0xe0
[  160.849632]  [<c10e0101>] ? sys_swapon+0xab1/0xc50
[  160.849640]  [<c1325308>] usb_control_msg+0xb8/0xf0
[  160.849648]  [<c12ad1e8>] ? _dev_info+0x28/0x30
[  160.849656]  [<c131e627>] hub_port_init+0x627/0x710
[  160.849664]  [<c131d396>] ? usb_set_device_state+0x76/0x130
[  160.849672]  [<c1320906>] hub_thread+0x626/0x1080
[  160.849681]  [<c10515a1>] ? finish_task_switch+0x31/0xf0
[  160.849688]  [<c14635c0>] ? __schedule+0x3b0/0x7b0
[  160.849698]  [<c10490c0>] ? __init_waitqueue_head+0x50/0x50
[  160.849705]  [<c1050ef9>] ? complete+0x49/0x60
[  160.849713]  [<c13202e0>] ? usb_remote_wakeup+0x40/0x40
[  160.849720]  [<c1048928>] kthread+0x78/0x80
[  160.849728]  [<c10488b0>] ? __init_kthread_worker+0x60/0x60
[  160.849736]  [<c146b0fe>] kernel_thread_helper+0x6/0xd
[  160.849755]
[  160.849759] Restarting tasks ... done.
[  160.865733] power_supply BAT0: uevent
[  160.865737] power_supply BAT0: POWER_SUPPLY_NAME=BAT0
[  160.886551] power_supply BAT0: prop STATUS=Full
[  160.886562] power_supply BAT0: prop PRESENT=1
[  160.886570] power_supply BAT0: prop TECHNOLOGY=Unknown
[  160.886577] power_supply BAT0: prop CYCLE_COUNT=0

I can supply full dmesg if needed.
a bisect on this should not take too long, just need the time to do so.

last good kernel I have here is: 3.2.0-06541-gf33180c

Justin P. Mattock
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