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On Sunday 25 September 2005 20:47, John C. Shimek wrote: |
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> You do a straight 32bit install on your amd64. |
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That's beside the point. His question was whether he could just use a 32-bit |
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kernel with a 64-bit userland (i.e. not having to recompile everything), the |
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answer to which is no. |
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> I don't know whether to call your precessor an athlon or maybe |
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> a generic x86 processor. |
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Depending on his version of GCC, he would use -march=athlon64 or |
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-march=athlon-xp, i believe |
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> It is the same as running Windows 2000/XP on this processor. The OS thinks |
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> it has a 32bit CPU. Only you are limited to 32bit limitation on hardware, |
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And you miss out on a bunch of extra general-purpose registers, which is |
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actually what makes x86_64 faster than x86, not the 64-bitness, which would |
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otherwise make it slower due to larger code size |
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> mainly memory |
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AFAIK, only if you have >= 4GB |
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> and possibly harddrive, I don't know. |
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No. |
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> I am sure others can point in the correct direction for |
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> rebuild your system if needed, let more experieced wiser minds help |
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> where they can. |
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Except that's what he's trying to avoid... |
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