Re: Kernel locks up after calling kernel_execve()

["Gerhard Pircher" <gerhard_pircher@gmx.net>]

-------- Original-Nachricht --------
> Datum: Fri, 09 Nov 2007 10:20:17 +1100
> Von: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> An: Gerhard Pircher <gerhard_pircher@gmx.net>
> CC: linuxppc-dev@ozlabs.org
> Betreff: Re: Kernel locks up after calling kernel_execve()

> 
> On Thu, 2007-11-08 at 22:47 +0100, Gerhard Pircher wrote:
> > Hi,
> > 
> > I tested my patches for the AmigaOne platform with the lastest
> > 2.6.24-rc2 kernel snapshot. The kernel runs through all initcalls, but
> > locks up completely after calling INIT (/sbin/init) by kernel_execve().
> > Thus I couldn't capture any kernel oops or panic output. Also the magic 
> > sysrq key doesn't work. Enabling debug code for soft lockups and
> > spinlock debugging didn't reveal any information.
> > I'm not sure, but I think it is the same problem I had with all kernels
> > >= 2.6.17. All of these kernels lock up shortly before or right at
> > calling the init program (resp. as soon as the kernel forks some kernel
> > theads).
> > Any suggestions on how to track down this problem?
> 
> You don't have a HW debugger or anything like that ?
> 
> Ben.
Unfortunately, no. A BDI2000 is too costly for me.

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?

Gerhard

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