Messages in this thread |  | | Date | Mon, 14 May 2001 18:46:47 -0700 | From | "H. Peter Anvin" <> | Subject | Re: 2.4.4 kernel reports wrong amount of physical memory |
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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
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