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Date: Tue, 10 Jan 2012 14:59:59 +0900
From: Kyungmin Park <kmpark@...radead.org>
To: Amit Sahrawat <amit.sahrawat83@...il.com>
Cc: Pavel Machek <pavel@....cz>, "Rafael J. Wysocki" <rjw@...k.pl>,
Len Brown <len.brown@...el.com>, linux-pm@...r.kernel.org,
linux-kernel@...r.kernel.org, Tejun Heo <tj@...nel.org>
Subject: Re: BUG: sleeping function called from invalid context at include/linux/freezer.h:45
On 1/10/12, Amit Sahrawat <amit.sahrawat83@...il.com> wrote:
> On Tue, Jan 10, 2012 at 9:57 AM, Kyungmin Park <kmpark@...radead.org> wrote:
>> Dear all
>>
>> with the latest kernel. I got the below bug message.
>> It calls the sleep function. Does it intended operation?
>>
>> static inline bool try_to_freeze(void)
>> {
>> might_sleep();
>> if (likely(!freezing(current)))
>> return false;
>> return __refrigerator(false);
>> }
> this change is part of this GIT:
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=a0acae0e886d44bd5ce6d2f173c1ace0fcf0d9f6
>
>>
>> # poweroff
>> [ 6.852523] BUG: sleeping function called from invalid context at
>> include/linux/freezer.h:45
>> [ 6.859489] in_atomic(): 0, irqs_disabled(): 128, pid: 1, name: init
>> [ 6.865846] [<c0013508>] (unwind_backtrace+0x0/0xec) from
>> [<c0010124>] (do_signal+0x88/0x588)
>> [ 6.874337] [<c0010124>] (do_signal+0x88/0x588) from [<c001063c>]
>> (do_notify_resume+0x18/0x38)
>> [ 6.882928] [<c001063c>] (do_notify_resume+0x18/0x38) from
>> [<c000dc18>] (work_pending+0x24/0x28)
> is this the complete backtrace...?
yes
> The above backtrace shows that freezing was called from a context
> wherein - IRQs are disabled - which resulted in this error.
> How about checking ...
> BUG_ON(irqs_disabled()); in try_to_freeze()...
> not sure though... please check and update me also...
Here's update trace with BUG_ON(irqs_disabled())
# poweroff
[ 8.147056] ------------[ cut here ]------------
[ 8.150205] kernel BUG at include/linux/freezer.h:45!
[ 8.155236] Internal error: Oops - undefined instruction: 0 [#1] PREEMPT SMP
[ 8.162266] Modules linked in:
[ 8.165306] CPU: 1 Not tainted (3.2.0+ #97)
[ 8.169830] PC is at do_signal+0x84/0x598
[ 8.173814] LR is at do_notify_resume+0x18/0x38
[ 8.178327] pc : [<c0010120>] lr : [<c001064c>] psr: 20000093
[ 8.178333] sp : df849ed0 ip : 00100100 fp : 00000000
[ 8.189781] r10: b6cd089c r9 : df848000 r8 : 00000000
[ 8.194991] r7 : c000dd44 r6 : fffffe00 r5 : b6cd08a0 r4 : df849fb0
[ 8.201500] r3 : ffffffff r2 : 00000080 r1 : c000dd44 r0 : df849fb0
[ 8.208011] Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment use
r
[ 8.215215] Control: 10c53c7d Table: 5f9c004a DAC: 00000015
[ 8.220945] Process init (pid: 1, stack limit = 0xdf8482f0)
[ 8.226498] Stack: (0xdf849ed0 to 0xdf84a000)
[ 8.230840] 9ec0: df848000 00000000 00000
000 c0042b18
[ 8.239001] 9ee0: df849f30 c0269028 0000c350 00000001 bee6fc08 df849f30 0000c
350 0000c350
[ 8.247161] 9f00: 00000000 3b9aca00 00000001 df84a00c 00000001 00000001 df849
f2c c004bc18
[ 8.255320] 9f20: df849f60 df848000 00000000 c026aa60 df849f60 c0025890 df849
f60 df844168
[ 8.263478] 9f40: 00000004 00000003 00000000 00000000 00000000 df848000 00000
000 c0025960
[ 8.271637] 9f60: 00000003 00000004 00000000 00000000 00000000 00000000 00000
000 df844000
[ 8.279797] 9f80: c0024468 00000001 00000000 00000000 00000072 00000000 df848
000 00000000
[ 8.287956] 9fa0: 00000000 c001064c b6f0fa88 c000dc18 ffffffff 00000000 00000
000 00000000
[ 8.296115] 9fc0: b6f0fa88 00000000 00000000 00000072 ffffffff 00000000 00000
2fe 00000000
[ 8.304275] 9fe0: b6d73000 bee6fc18 b6ed2c8c b6cd089c 60000010 ffffffff fffff
fff ffffffff
[ 8.312442] [<c0010120>] (do_signal+0x84/0x598) from [<c001064c>] (do_notify_
resume+0x18/0x38)
[ 8.321032] [<c001064c>] (do_notify_resume+0x18/0x38) from [<c000dc18>] (work
_pending+0x24/0x28)
[ 8.329795] Code: e5843000 e10f2000 e2122080 0a000001 (e7f001f2)
[ 8.335894] ---[ end trace 036b1d3292ef9478 ]---
# [ 8.340671] Kernel panic - not syncing: Attempted to kill init!
[ 8.346579] [<c0013508>] (unwind_backtrace+0x0/0xec) from [<c0267eac>] (panic
+0x5c/0x1a0)
[ 8.354724] [<c0267eac>] (panic+0x5c/0x1a0) from [<c0025b54>] (do_exit+0xa0/0
x6d4)
[ 8.362279] [<c0025b54>] (do_exit+0xa0/0x6d4) from [<c0011534>] (die+0x1c4/0x
1f0)
[ 8.369735] [<c0011534>] (die+0x1c4/0x1f0) from [<c0008368>] (do_undefinstr+0
x164/0x188)
[ 8.377806] [<c0008368>] (do_undefinstr+0x164/0x188) from [<c000d868>] (__und
_svc+0x48/0x60)
[ 8.386221] Exception stack(0xdf849e88 to 0xdf849ed0)
[ 8.391256] 9e80: df849fb0 c000dd44 00000080 ffffffff df849
fb0 b6cd08a0
[ 8.399416] 9ea0: fffffe00 c000dd44 00000000 df848000 b6cd089c 00000000 00100
100 df849ed0
[ 8.407571] 9ec0: c001064c c0010120 20000093 ffffffff
[ 8.412612] [<c000d868>] (__und_svc+0x48/0x60) from [<c0010120>] (do_signal+0
x84/0x598)
[ 8.420598] [<c0010120>] (do_signal+0x84/0x598) from [<c001064c>] (do_notify_
resume+0x18/0x38)
[ 8.429190] [<c001064c>] (do_notify_resume+0x18/0x38) from [<c000dc18>] (work
_pending+0x24/0x28)
[ 8.437952] CPU0: stopping
[ 8.440645] [<c0013508>] (unwind_backtrace+0x0/0xec) from [<c0012524>] (handl
e_IPI+0xec/0x168)
[ 8.449234] [<c0012524>] (handle_IPI+0xec/0x168) from [<c0008558>] (gic_handl
e_irq+0xa0/0xac)
[ 8.457740] [<c0008558>] (gic_handle_irq+0xa0/0xac) from [<c000d7c0>] (__irq_
svc+0x40/0x70)
[ 8.466066] Exception stack(0xc036df40 to 0xc036df88)
[ 8.471106] df40: 0006542c 00001f40 00000008 18b8ce13 c0801318 00000000 c036c
000 c03859d4
[ 8.479264] df60: c03a6538 412fc091 00000000 00000000 18b8cdfb c036df88 c0058
f6c c001da9c
[ 8.487419] df80: 20000013 ffffffff
[ 8.490904] [<c000d7c0>] (__irq_svc+0x40/0x70) from [<c001da9c>] (exynos4_ent
er_idle+0x2c/0x5c)
[ 8.499583] [<c001da9c>] (exynos4_enter_idle+0x2c/0x5c) from [<c021c3e4>] (cp
uidle_idle_call+0x1a0/0x340)
[ 8.509128] [<c021c3e4>] (cpuidle_idle_call+0x1a0/0x340) from [<c000ed24>] (c
pu_idle+0x74/0xe0)
[ 8.517810] [<c000ed24>] (cpu_idle+0x74/0xe0) from [<c034a858>] (start_kernel
+0x32c/0x384)
[ 8.526049] Rebooting in 1 seconds..
>>
>> commit e4e11180dfa545233e5145919b75b7fac88638df
>> Merge: 37cfc3f adc0e91
>> Author: Linus Torvalds <torvalds@...ux-foundation.org>
>> Date: Mon Jan 9 17:37:37 2012 -0800
>>
>> Merge branch 'for-linus' of
>> git://git.kernel.org/pub/scm/linux/kernel/git/vi
>>
>> Thank you,
>> Kyungmin Park
>> --
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