Re: PXM/Nid/SLIT patch

From: Robert Picco <Robert.Picco_at_hp.com>
Date: 2004-02-19 05:56:48
Christoph Hellwig wrote:

>On Wed, Feb 18, 2004 at 10:33:29AM -0500, Robert Picco wrote:
>  
>
>>This PXM value (255) isn't a SLIT or PXM defined quantity.  It is really 
>>specific to HP cell machines.  For example, a machine configured with 
>>two cells will report three PXMs.  Two for the CPUs and one for the 
>>interleaved memory at magic PXM 255.  The firmware doesn't report SLIT 
>>information for PXM 255. The patch approximates the SLIT value for PXM 
>>255. I have attempted to arrive at code which doesn't break non-HP 
>>hardware configurations. I have assumed the way the initialization code 
>>was written that all NIDs require memory.  Otherwise 
>>reserve_pernode_space will fail.
>>    
>>
>
>I know HP basically owns the IA64 ports, but honestly can't you fix
>the firmware to return sane information instead?  i.e. move the above
>fix to firmware instead of letting linux fixup the reported data.
>
>  
>
Well some of us would like to see this too.  Some legacy requirements 
from our other supported OSes require this to be the default 
configuration.  Perhaps a different default can be made in the future or 
some IPMI tool to change the default.

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Received on Wed Feb 18 15:28:09 2004

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