https://bugzilla.kernel.org/show_bug.cgi?id=36532


Tetsuo Handa <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[email protected]
                   |                            |A.ne.jp




--- Comment #5 from Tetsuo Handa <[email protected]>  
2011-06-21 07:55:42 ---
Same except that mine has a "lockdep: fixing up alternatives." line
after the "Disabling non-boot CPUs ..." line.
The machine can reach power off.

[  130.472652] ACPI: Preparing to enter system sleep state S5
[  130.474450] Disabling non-boot CPUs ...
[  130.478419] lockdep: fixing up alternatives.
[  130.513228] Power down.
[  130.514314] 
[  130.514315] =============================================
[  130.515138] [ INFO: possible recursive locking detected ]
[  130.515138] 3.0.0-rc4-ccs #3
[  130.515138] ---------------------------------------------
[  130.515138] halt/3843 is trying to acquire lock:
[  130.515138]  (&(lock)->rlock){......}, at: [<c11e1659>]
acpi_os_acquire_lock+0x8/0xa
[  130.515138] 
[  130.515138] but task is already holding lock:
[  130.515138]  (&(lock)->rlock){......}, at: [<c11e1659>]
acpi_os_acquire_lock+0x8/0xa
[  130.515138] 
[  130.515138] other info that might help us debug this:
[  130.515138]  Possible unsafe locking scenario:
[  130.515138] 
[  130.515138]        CPU0
[  130.515138]        ----
[  130.515138]   lock(&(lock)->rlock);
[  130.515138]   lock(&(lock)->rlock);
[  130.515138] 
[  130.515138]  *** DEADLOCK ***
[  130.515138] 
[  130.515138]  May be due to missing lock nesting notation
[  130.515138] 
[  130.515138] 2 locks held by halt/3843:
[  130.515138]  #0:  (reboot_mutex){+.+.+.}, at: [<c1050dc9>]
sys_reboot+0xb9/0x1a0
[  130.515138]  #1:  (&(lock)->rlock){......}, at: [<c11e1659>]
acpi_os_acquire_lock+0x8/0xa
[  130.515138] 
[  130.515138] stack backtrace:
[  130.515138] Pid: 3843, comm: halt Not tainted 3.0.0-rc4-ccs #3
[  130.515138] Call Trace:
[  130.515138]  [<c106df30>] print_deadlock_bug+0xd0/0xe0
[  130.515138]  [<c106dffe>] check_deadlock+0xbe/0x160
[  130.515138]  [<c106ec5b>] validate_chain+0x27b/0x530
[  130.515138]  [<c1070f04>] __lock_acquire+0x2a4/0x8f0
[  130.515138]  [<c1070f3c>] ? __lock_acquire+0x2dc/0x8f0
[  130.515138]  [<c10725ca>] lock_acquire+0x7a/0xa0
[  130.515138]  [<c11e1659>] ? acpi_os_acquire_lock+0x8/0xa
[  130.515138]  [<c138fcf4>] _raw_spin_lock_irqsave+0x44/0x80
[  130.515138]  [<c11e1659>] ? acpi_os_acquire_lock+0x8/0xa
[  130.515138]  [<c11e1659>] acpi_os_acquire_lock+0x8/0xa
[  130.515138]  [<c11ef803>] acpi_ev_walk_gpe_list+0x1b/0x6f
[  130.515138]  [<c11f5ca7>] ? acpi_hw_disable_gpe_block+0x34/0x34
[  130.515138]  [<c11f5efc>] acpi_hw_clear_acpi_status+0x32/0x46
[  130.515138]  [<c11f6317>] acpi_enter_sleep_state+0x83/0x1ac
[  130.515138]  [<c1020995>] ? disable_IO_APIC+0xb5/0xd0
[  130.515138]  [<c103fcc8>] ? printk+0x18/0x20
[  130.515138]  [<c11e297b>] acpi_power_off+0x21/0x26
[  130.515138]  [<c101b048>] native_machine_power_off+0x18/0x30
[  130.515138]  [<c101b069>] machine_power_off+0x9/0x10
[  130.515138]  [<c1050cfe>] kernel_power_off+0x3e/0x50
[  130.515138]  [<c1050e1d>] sys_reboot+0x10d/0x1a0
[  130.515138]  [<c104dbe3>] ? kill_something_info+0x13/0x170
[  130.515138]  [<c10722c7>] ? __lock_release+0x47/0x70
[  130.515138]  [<c104dbe3>] ? kill_something_info+0x13/0x170
[  130.515138]  [<c104dc38>] ? kill_something_info+0x68/0x170
[  130.515138]  [<c104dbe3>] ? kill_something_info+0x13/0x170
[  130.515138]  [<e087bd58>] ? ccs_signal_acl+0x28/0x90 [ccsecurity]
[  130.515138]  [<c104f821>] ? sys_kill+0x81/0x90
[  130.515138]  [<c10ebb13>] ? mntput+0x13/0x20
[  130.515138]  [<c10d1d67>] ? __fput+0x147/0x220
[  130.515138]  [<c10d1e59>] ? fput+0x19/0x20
[  130.515138]  [<c10cfbf9>] ? filp_close+0x49/0x70
[  130.515138]  [<c13907e4>] ? restore_all+0xf/0xf
[  130.515138]  [<c13907b1>] syscall_call+0x7/0xb

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