https://bugzilla.kernel.org/show_bug.cgi?id=36532
Clemens Ladisch <clem...@ladisch.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |clem...@ladisch.de
--- Comment #6 from Clemens Ladisch <clem...@ladisch.de> 2011-07-05 06:50:30
---
Same message here when powering off (which actually still works fine):
=============================================
[ INFO: possible recursive locking detected ]
3.0.0-rc5+ #290
---------------------------------------------
poweroff/1547 is trying to acquire lock:
(&(lock)->rlock){......}, at: [<ffffffff8122243c>]
acpi_os_acquire_lock+0x9/0xb
but task is already holding lock:
(&(lock)->rlock){......}, at: [<ffffffff8122243c>]
acpi_os_acquire_lock+0x9/0xb
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&(lock)->rlock);
lock(&(lock)->rlock);
*** DEADLOCK ***
May be due to missing lock nesting notation
2 locks held by poweroff/1547:
#0: (reboot_mutex){+.+.+.}, at: [<ffffffff81046b47>] sys_reboot+0x91/0x16a
#1: (&(lock)->rlock){......}, at: [<ffffffff8122243c>]
acpi_os_acquire_lock+0x9/0xb
stack backtrace:
Pid: 1547, comm: poweroff Not tainted 3.0.0-rc5+ #290
Call Trace:
[<ffffffff81060147>] validate_chain+0x6b2/0xe4c
[<ffffffff8105d537>] ? save_trace+0x3f/0xb1
[<ffffffff81061160>] __lock_acquire+0x87f/0x8f0
[<ffffffff81238f23>] ? acpi_hw_enable_runtime_gpe_block+0x43/0x43
[<ffffffff810615fa>] lock_acquire+0x57/0x6d
[<ffffffff8122243c>] ? acpi_os_acquire_lock+0x9/0xb
[<ffffffff81480ae6>] _raw_spin_lock_irqsave+0x37/0x49
[<ffffffff8122243c>] ? acpi_os_acquire_lock+0x9/0xb
[<ffffffff812391f5>] ? acpi_hw_write+0x49/0x50
[<ffffffff8122243c>] acpi_os_acquire_lock+0x9/0xb
[<ffffffff812328d9>] acpi_ev_walk_gpe_list+0x23/0x87
[<ffffffff8123945a>] acpi_hw_clear_acpi_status+0x39/0x55
[<ffffffff81239a01>] acpi_enter_sleep_state+0x8b/0x1c2
[<ffffffff8147d9b4>] ? printk+0x3c/0x3e
[<ffffffff81223dd6>] acpi_power_off+0x29/0x2b
[<ffffffff81015f2d>] native_machine_power_off+0x22/0x24
[<ffffffff81015efd>] machine_power_off+0xa/0xc
[<ffffffff8104692c>] kernel_power_off+0x43/0x45
[<ffffffff81046bb9>] sys_reboot+0x103/0x16a
...
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