Kernel locks up after calling kernel_execve()

Gerhard Pircher gerhard_pircher at
Wed Nov 14 21:15:24 EST 2007

-------- Original-Nachricht --------
> Datum: Wed, 14 Nov 2007 21:04:57 +1100
> Von: Benjamin Herrenschmidt <benh at>
> An: Gerhard Pircher <gerhard_pircher at>
> CC: linuxppc-dev at
> Betreff: Re: Kernel locks up after calling kernel_execve()

> On Wed, 2007-11-14 at 10:39 +0100, Gerhard Pircher wrote:
> > Yeah, the northbridge hates the M bit! Thus the AmigaOne platform code
> > masks out the CPU_FTR_NEED_COHERENT flag and disables the L2 cache
> > prefetch engines (I don't care about the performance loss).
> > I couldn't find any other code that sets the M bit, except for huge
> > TLB
> > page support, but isn't that only for PPC64?
> Right, it's only 64 bits. You've double checked nothing broke the M bit
> thing ? In which case, I don't know what else...
Yes, I did. Otherwise the machine dies much earlier in the boot process.

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