On Thu, 2012-01-19 at 17:16 +0100, John Kacur wrote:

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

Could you test 3.2-rt. If that has the issue then we know we have more
to fix. If not, we know I missed a patch.

-- Steve