Re: 2.4.4 kernel reports wrong amount of physical memory

H. Peter Anvin (hpa@transmeta.com)
Mon, 14 May 2001 18:46:47 -0700

Brian Gerst wrote:
> >
> > It seems obvious once you know why the limits are there. The 1 GB
> > limit (actually 1024-128 MB = 896 MB) is a software limit; the 4 GB
> > and 64 GB limits are hardware limits and are exact.
>
> Even with the 4GB and 64GB options, some physical address space has to
> be reserved for memory mapped I/O.
>

Oh, right. It's not just virtual address space. Geez, I'm being really
dense today :)

-hpa

-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt
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