Date: Tue, 7 Nov 2000 08:57:47 -0800 From: Joshua Uziel <uzi@suse.com> Message-ID: <20001107085747.D17466@gimp.org> Subject: Re: [suse-sparc] Memory Mapped Problem
* Peter Berthold <nowistime@operamail.com> [001106 09:45]:
> Hey, ih have a problem.
> I want to install SUSE7 on my ULTRA10 with 768MB RAM.
> When i remove 2 128MB DIMM's all works fine!
> What can i do?
Nobody says it better than Dave... from the ultralinux@vger mailing list
on Aug 14, 2000, Subject: Re: Ultra 5 with 1GB of memory:
--- | It will not boot with more then 512MB of memory (using the mem=512m | boot option). Anything over that gives a: | | WARNING: not all physical memory mapped in IOMMU | | The prom-property for "virtual-dma" is c0000000 [20000000] for 512MB.Right, Linux does not support more than 512MB of physical memory on Ultra5/10 in the 2.2.x kernels.
| Does anyone know how to change this to 80000000 [40000000] for 1024MB? | Solaris 8 knows how to do this as I have two other machines just like | this running Solaris 8. Solaris is not changing the virtual-dma property, instead it does what Linux-2.4.x does, use dynamic dma mapping so that the amount of supportable memory is independant of the size of the DMA region.
2.4.x kernels are your only bet if you wish to use all 1GB of memory. ---
So, your two options are: 1) boot with a mem=512m line and live with it for now 2) Go to a 2.4.x kernel... your best bet here is to snarf it from cvs via the instructions at http://vger.samba.org/ ...
Good luck. :)
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