Problems with AMD64 and 8 GB RAM?

David O'Brien obrien at
Thu Mar 31 10:45:25 PST 2005

On Wed, Mar 30, 2005 at 03:25:37PM -0800, Peter Wemm wrote:
> Greg:  The busdma problems from 5.3-RELEASE are fixed.  That doesn't 
> mean that there are no *other* problems.  Scott is saying "the old 
> busdma bug shouldn't be affecting 5.4-PRE", and he's correct.
> Most likely, something else is happening, eg: you're running out of KVM 
> or something silly like that.  I know we're right on the brink at 8GB.   
> The layout of the devices may be just enough to tip it over the edge.

Grog's motherboard is a 4+0 configuration -- which would mean he is using
(trying to) 2GB DIMM's.  There are memory bus loading specifictions he
may be out of spec of.

-- David  (obrien at

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