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Date: Mon, 24 Feb 2014 23:00:35 +0100
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai] RaspberryPi kernel 3.8 issue
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To: Gregory Dymarek <gregd72002@gmail.com>
Cc: xenomai@xenomai.org

On 02/24/2014 10:19 PM, Gregory Dymarek wrote:
> Hi Gilles,
> 
> I compiled the kernel width the stack unwind disabled and it throws the
> same warning while booting: http://pastebin.com/mSTnPACr
> [    1.948056] WARNING: at kernel/irq/handle.c:146
> handle_irq_event_percpu+0x198/0x1c0(
> [    1.959568] irq 32 handler usb_hcd_irq+0x0/0x84 enabled interrupts
> 
> Also, when unlpugging USB devices I get kernel panics:
> http://pastebin.com/Nr87y8Ki

Yes, but we now have a clear trace, where we see that ipipe_do_irq is
indeed called.

> 
> What else would you need to see to identify the actual failure?
> How should be the root domain stalled, how to look for it?

The simplest solution is to enable the I-pipe tracer, and trigger a
trace freeze instead of the warning.

The I-pipe tracer should show us where the root domain is unstalled.

-- 
                                                                Gilles.