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SubjectRe: 2.6.15-mm4 failure on power5

* Michael Ellerman <> wrote:

> On Tue, 17 Jan 2006 08:52, Dave C Boutcher wrote:
> > 2.6.15-mm4 won't boot on my power5 either. I tracked it down to the
> > following mutex patch from Ingo: kernel-kernel-cpuc-to-mutexes.patch
> >
> > If I revert just that patch, mm4 boots fine. Its really not obvious to
> > me at all why that patch is breaking things though...
> My POWER5 (gr) LPAR seems to boot ok (3 times so far) with that patch,
> guess it's something subtle. That's with CONFIG_DEBUG_MUTEXES=y. And
> it's just booted once with CONFIG_DEBUG_MUTEXES=n.
> And now it's booted the full mm4 patch set without blinking.

so it booted fine with CONFIG_DEBUG_MUTEXES=n but with that patch not

the patch will likely work around the bug, so DEBUG_MUTEXES=y/n should
make no difference with that patch applied.

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