On Wed, Jan 18, 2012 at 2:02 AM, Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
> On Wed, 2012-01-18 at 00:53 +0100, Karsten Wiese wrote:
>
>> The bug happens because acpi_ev_gpe_detect does
>> raw_spin_lock_irqsave(&acpi_gbl_gpe_lock, flags) before it calls
>> acpi_ev_gpe_dispatch.
>
> Correct. I believe there's a fix in the 3.2-rt. I'm working on getting
> the updates from it to the stable tree.
I'm testing v3.0.14-rt32-rc1, and it greatly reduced the number of
these, but I still got one during boot.
[ 11.938649] BUG: sleeping function called from invalid context at
/home/jkacur/rt.linux.git/kernel/rtmutex.c:645
[ 11.938651] in_atomic(): 1, irqs_disabled(): 1, pid: 168, name: irq/9-acpi
[ 11.938653] 1 lock held by irq/9-acpi/168:
[ 11.938653] #0: (acpi_gbl_gpe_lock){......}, at:
[<ffffffff8123881d>] acpi_ev_gpe_detect+0x31/0x110
[ 11.938661] irq event stamp: 1148
[ 11.938662] hardirqs last enabled at (1147): [<ffffffff813e4731>]
_raw_spin_unlock_irq+0x30/0x5e
[ 11.938667] hardirqs last disabled at (1148): [<ffffffff813e4524>]
_raw_spin_lock_irqsave+0x1e/0x85
[ 11.938669] softirqs last enabled at (0): [<ffffffff81041c88>]
copy_process+0x517/0xfbd
[ 11.938673] softirqs last disabled at (0): [< (null)>]
(null)
[ 11.938676] Pid: 168, comm: irq/9-acpi Not tainted
3.0.14-rt32-rc1-debug-00323-ga86a4da #1
[ 11.938677] Call Trace:
[ 11.938681] [<ffffffff81037b06>] __might_sleep+0xf4/0xf9
[ 11.938684] [<ffffffff8107e6b1>] rt_spin_lock_fastlock.clone.0+0x24/0x31
[ 11.938687] [<ffffffff813e3cb3>] rt_spin_lock+0x16/0x40
[ 11.938690] [<ffffffff8107574c>] ? trace_hardirqs_off_caller+0x1f/0x99
[ 11.938694] [<ffffffff8111ac19>] __local_lock_irq+0x29/0x7c
[ 11.938696] [<ffffffff8111ac8c>] __local_lock_irqsave+0x20/0x31
[ 11.938698] [<ffffffff8111dfc1>] kmem_cache_alloc_trace+0x5f/0x14f
[ 11.938701] [<ffffffff81238683>] ? acpi_os_allocate_zeroed+0x2d/0x2d
[ 11.938704] [<ffffffff81227831>] __acpi_os_execute+0x38/0x143
[ 11.938706] [<ffffffff81227969>] acpi_os_execute+0x10/0x12
[ 11.938708] [<ffffffff812385e5>] acpi_ev_gpe_dispatch+0xdf/0x12e
[ 11.938710] [<ffffffff812388a7>] acpi_ev_gpe_detect+0xbb/0x110
[ 11.938713] [<ffffffff81237008>] acpi_ev_sci_xrupt_handler+0x22/0x2b
[ 11.938715] [<ffffffff8122700e>] acpi_irq+0x16/0x31
[ 11.938719] [<ffffffff810ade67>] irq_forced_thread_fn+0x25/0x45
[ 11.938721] [<ffffffff813e4751>] ? _raw_spin_unlock_irq+0x50/0x5e
[ 11.938723] [<ffffffff810adcaa>] irq_thread+0xff/0x1e9
[ 11.938725] [<ffffffff810ade42>] ? exit_irq_thread+0x74/0x74
[ 11.938727] [<ffffffff810adbab>] ? irq_finalize_oneshot+0xaf/0xaf
[ 11.938730] [<ffffffff810adbab>] ? irq_finalize_oneshot+0xaf/0xaf
[ 11.938733] [<ffffffff81062b48>] kthread+0x94/0x9c
[ 11.938735] [<ffffffff813e7633>] ? sub_preempt_count+0xa3/0xb6
[ 11.938738] [<ffffffff813e4751>] ? _raw_spin_unlock_irq+0x50/0x5e
[ 11.938741] [<ffffffff813ebcd4>] kernel_thread_helper+0x4/0x10
[ 11.938744] [<ffffffff8103bec0>] ? finish_task_switch+0x85/0xe2
[ 11.938746] [<ffffffff813e4b04>] ? retint_restore_args+0xe/0xe
[ 11.938749] [<ffffffff81062ab4>] ? kthreadd+0x168/0x168
[ 11.938751] [<ffffffff813ebcd0>] ? gs_change+0xb/0xb
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