Re: Early boot hang on recent 2.6 kernels (> 2.6.3), on x86-64 with 16gb of RAM

[Robin Lee Powell]

On Mon, Sep 18, 2006 at 09:50:41AM +0200, Andi Kleen wrote:
> Robin Lee Powell <rlpowell@xxxxxxxxxxxxxxxxxx> writes:
> > 
> > This version is rather different, as it ends in:
> > 
> >     HARDWARE ERROR
> >     CPU 0: Machine Check Exception:                7 Bank 3: b40000000000083b
> >     RIP 10:<ffffffff80446e3e> {pci_conf1_read+0xbe/0xf0}
> >     TSC 2e7932dbf8 ADDR fdfc000cfc
> >     This is not a software problem!
> >     Run through mcelog --ascii to decode and contact your hardware vendor
> >     Kernel panic - not syncing: Uncorrected machine check
> 
> Decoded it gives
> 
> ..
>   bus error 'local node origin, request didn't time out
>       data read mem transaction
>       i/o access, level generic'
> ..
> 
> It will probably boot with mce=off acpi=off pci=conf1 

Indeed!  Even on the ones that weren't having an MCE problem.

> You got some buggy device that causes a bus timeout when its
> config space is read. The old kernel most likely didn't touch it
> by luck.
> 
> Please add the following patch and send the whole log. This will
> tell us which device has this problem.

OK.  I'll post results in a bit.

-Robin

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