Subject: Re: Mutex debug lock failure [was Re: Bad gcc-4.1.0 leads to Power4 crashes... and power5 too, actually

From: Ingo Molnar <[email-masked]>
Date: Thu, 21 Dec 2006 15:41:39 +0100

On Wed, 2006-12-20 at 19:03 -0600, Linas Vepstas wrote:
> Same kernel runs fine on power5. Although it does have patches
> applied, those very same patches boot fine when applied to a slightly
> older kernel (2.6.19-rc4).  I haven't been messing with buids or 
> pci config space (at least not intentionaly).
> 
> I'll try again with an unpatched, unmodified kernel.

there have been a number of fixes to lockdep recently - could you try
the kernel/lockdep.c file from latest -mm, does that fail too?

one possibility would be a chain-hash collision.

	Ingo