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Re: EM64T server kernel architecture - ia32e or x86_64?



On Fri, 2004-12-17 at 08:44 -0500, Brian Long wrote:

> Arjan,
> 
> Does that mean RHEL 4's single x86_64 kernel removed AMD-specific
> optimizations so it would run on AMD64 and EM64T?

sort of kinda but not quite.
the RHEL4 kernel will runtime patch the code to put such cpu specific
optimizations in. So on AMD64 you do get the optimisations, on EM64T you
don't get those. But that's done by runtime patching not a separate
binary image.

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