Messages in this thread | | | From | Marvin Justice <> | Subject | Re: highmem question | Date | Fri, 7 Dec 2001 19:30:01 -0600 |
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> > > I heard that himem slows down systems. > > It does, because it's a hack to extend 32-bit machines beyond their > architectural lifetime. >
While it certainly makes sense to expect a performance hit for mem above 4GB on 32 bit systems I don't see why there should be any a priori reason to either move to 64 bit or take a performance hit for if you need, say, 2GB of RAM. The problem is that 2.4 Linux considers HIGHMEM to be anything above 896MB.
>From what I've read it looks like there will be changes in 2.5 to fix all this.
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