I got a whole bunch of these in 3.0.14-rt31 that basically look alike.
Will try to drill deeper down. In the meantime, I'm happy to provide
more information if anyone would like.
Thanks, John
[ 4251.928097] BUG: sleeping function called from invalid context at
/home/jkacur/rt.linux.git/kernel/rtmutex.c:645
[ 4251.928100] in_atomic(): 1, irqs_disabled(): 1, pid: 168, name: irq/9-acpi
[ 4251.928102] INFO: lockdep is turned off.
[ 4251.928103] irq event stamp: 5888
[ 4251.928104] hardirqs last enabled at (5887): [<ffffffff810b2a69>]
rcu_preempt_note_context_switch+0x1c8/0x1d9
[ 4251.928109] hardirqs last disabled at (5888): [<ffffffff813e4326>]
_raw_spin_lock_irq+0x19/0x79
[ 4251.928113] softirqs last enabled at (0): [<ffffffff81041c88>]
copy_process+0x517/0xfbd
[ 4251.928116] softirqs last disabled at (0): [< (null)>]
(null)
[ 4251.928119] Pid: 168, comm: irq/9-acpi Not tainted
3.0.14-rt31-debug-00322-g6aaac97b #1
[ 4251.928121] Call Trace:
[ 4251.928125] [<ffffffff81037b06>] __might_sleep+0xf4/0xf9
[ 4251.928128] [<ffffffff8107e4f5>] rt_spin_lock_fastlock.clone.0+0x24/0x31
[ 4251.928130] [<ffffffff813e3b33>] rt_spin_lock+0x16/0x40
[ 4251.928133] [<ffffffff8103eb60>] __wake_up+0x28/0x50
[ 4251.928136] [<ffffffff8122ca51>] acpi_ec_gpe_handler+0x72/0xc4
[ 4251.928145] [<ffffffff81238443>] acpi_ev_gpe_dispatch+0xbd/0x12e
[ 4251.928147] [<ffffffff81238727>] acpi_ev_gpe_detect+0xbb/0x110
[ 4251.928150] [<ffffffff81236e88>] acpi_ev_sci_xrupt_handler+0x22/0x2b
[ 4251.928152] [<ffffffff81226e5e>] acpi_irq+0x16/0x31
[ 4251.928155] [<ffffffff810adcab>] irq_forced_thread_fn+0x25/0x45
[ 4251.928157] [<ffffffff813e45d1>] ? _raw_spin_unlock_irq+0x50/0x5e
[ 4251.928159] [<ffffffff810adaee>] irq_thread+0xff/0x1e9
[ 4251.928162] [<ffffffff810adc86>] ? exit_irq_thread+0x74/0x74
[ 4251.928164] [<ffffffff810ad9ef>] ? irq_finalize_oneshot+0xaf/0xaf
[ 4251.928166] [<ffffffff810ad9ef>] ? irq_finalize_oneshot+0xaf/0xaf
[ 4251.928169] [<ffffffff81062b48>] kthread+0x94/0x9c
[ 4251.928171] [<ffffffff813e1f99>] ? preempt_schedule+0x4b/0x53
[ 4251.928174] [<ffffffff813e45da>] ? _raw_spin_unlock_irq+0x59/0x5e
[ 4251.928177] [<ffffffff813ebb54>] kernel_thread_helper+0x4/0x10
[ 4251.928180] [<ffffffff813e4984>] ? retint_restore_args+0xe/0xe
[ 4251.928182] [<ffffffff81062ab4>] ? kthreadd+0x168/0x168
[ 4251.928184] [<ffffffff813ebb50>] ? gs_change+0xb/0xb
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