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Subject: Re: Kernel locks up after calling kernel_execve()
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Gerhard Pircher <gerhard_pircher@gmx.net>
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> I tried to use /bin/sh as init program and was able to enter a command,
> but then the machine locked up, too.
> Could that be a problem with a CPU sleeping/idle code?

That's possibly an issue, try disabling power save if any for that CPU
type. If it worked and broke, you may have to bisect tho.

Ben.