Re: how to limit memory with 2.6.10 on ppc64 machine?

[Michael Ellerman <michael@ellerman.id.au>]

On Sat, 4 Feb 2006 10:21, Christopher Friesen wrote:
> I'm running 2.6.10 on a ppc64 machine with 4GB of memory.
>
> We're debugging an issue and would like to try and see if disabling the
> U3 DART makes the problem go away.  Unfortunately, this particular blade
> is unstable if not all the memory banks are populated.
>
> After some frustration I looked at the code and realized that the "mem="
> functionality is not supported for ppc64 on this particular kernel.
>
> Can anyone give me some advice on the simplest way to limit this thing
> to under 2GB of memory so that the DART is not allocated/used?
>
> Does anyone know when support for "mem=" was added?  I know it is there
> in the current git version, but the "powerpc" consolidation means
> everything is all different now.

From memory (harhar) the mem= support was merged in 2.6.11, so the original 
patch should _probably_ apply on a vanilla 2.6.10 tree, try it:

http://patchwork.ozlabs.org/linuxppc64/patch?id=724

cheers

-- 
Michael Ellerman
IBM OzLabs

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