Re: PPC upstream kernel ignored DABR bug

On the Blade DABRX had to be set additional to DABR. PS3 and Celleb
already did this. Uli Weigand found this back in November. I submitted
a patch for this which went into 2.6.25-rc4.
Can you please try again with rc4 ?

This is not the problem.  This came up before and everyone seems have
forgotten.  This bug has been reproduced on G5's, which do not have DABRX
as I understand it.


Thanks,
Roland

On Mon, 2008-03-10 at 12:19 -0700, Roland McGrath wrote:

quoted

On the Blade DABRX had to be set additional to DABR. PS3 and Celleb
already did this. Uli Weigand found this back in November. I submitted
a patch for this which went into 2.6.25-rc4.
Can you please try again with rc4 ?

This is not the problem.  This came up before and everyone seems have
forgotten.  This bug has been reproduced on G5's, which do not have DABRX
as I understand it.

Yes, now that you mentioned, i've been able to reproduce this on 970FX's
blades, which i don't think have DABRX registers. I guess it's the
almost the same CPU as G5's.

Regards,

-- 
Luis Machado
Software Engineer 
IBM Linux Technology Center

On Mon, Mar 10, 2008 at 04:36:37PM -0300, Luis Machado wrote:

On Mon, 2008-03-10 at 12:19 -0700, Roland McGrath wrote:

quoted

quoted

On the Blade DABRX had to be set additional to DABR. PS3 and Celleb
already did this. Uli Weigand found this back in November. I submitted
a patch for this which went into 2.6.25-rc4.
Can you please try again with rc4 ?

This is not the problem.  This came up before and everyone seems have
forgotten.  This bug has been reproduced on G5's, which do not have DABRX
as I understand it.

Yes, now that you mentioned, i've been able to reproduce this on 970FX's
blades, which i don't think have DABRX registers. I guess it's the
almost the same CPU as G5's.

What Apple called G5 were during the production runs three different
CPUs:

970
970FX
970MP

970 was only used in the very first models. 970MP was used in the last
(the models with pci-express and up to 4 cpus). 970FX was used on almost
everything else inbetween.


-Olof

quoted

On the Blade DABRX had to be set additional to DABR. PS3 and Celleb
already did this. Uli Weigand found this back in November. I submitted
a patch for this which went into 2.6.25-rc4.
Can you please try again with rc4 ?

This is not the problem.  This came up before and everyone seems have
forgotten.  This bug has been reproduced on G5's, which do not have DABRX
as I understand it.

970 (all versions) _does_ have a DABRX register.  Dunno if it has
the same register definition (I cannot find DABRX in the Cell docs).


Segher