From: Michael Ellerman <michael@ellerman.id.au>
Reply-To: michael@ellerman.id.au
To: linuxppc64-dev@ozlabs.org
Subject: Re: how to limit memory with 2.6.10 on ppc64 machine?
Date: Sat, 4 Feb 2006 11:54:02 +1100
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Cc: "Christopher Friesen" <cfriesen@nortel.com>, linux-kernel@vger.kernel.org
References: <43E3E55C.90504@nortel.com>
In-Reply-To: <43E3E55C.90504@nortel.com>
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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=3D"
> 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=3D" was added?  I know it is there
> in the current git version, but the "powerpc" consolidation means
> everything is all different now.

=46rom memory (harhar) the mem=3D support was merged in 2.6.11, so the orig=
inal=20
patch should _probably_ apply on a vanilla 2.6.10 tree, try it:

http://patchwork.ozlabs.org/linuxppc64/patch?id=3D724

cheers

=2D-=20
Michael Ellerman
IBM OzLabs

email: michael:ellerman.id.au
inmsg: mpe:jabber.org
wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person

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