Messages in this thread | | | Date | Tue, 6 Nov 2007 20:53:05 +0100 | From | Willy Tarreau <> | Subject | Re: x86_64 ten times slower than i386 |
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On Tue, Nov 06, 2007 at 11:50:13AM -0800, H. Peter Anvin wrote: > Willy Tarreau wrote: > >Just out of curiosity, what would be the problem if the MTRRs covered more > >than the memory size ? For instance, instead of having 512 MB at 4G, why > >not have 1G at 4G ? > > That's fine, *as long as* you don't have any I/O devices there, > including things like UMA graphics devices or memory areas used by SMM. > In theory, those should be marked reserved in e820. In practice...
OK, thanks Peter for the explanation.
Cheers, Willy
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