Re: [openMosix-general] IA64

[Moshe B. <mo...@ql...>]

Hi Michael

The quick answer to your question: a lot. 

1. PentiumIV is by far not 64bit, but only 32bit, which is by the way
considerably worse than just half as good. 

2. You cannot simply recompile kernel code on written for a 32bit
computer on a 64bit computer, close your eyes, and hope all be fine. It
won't. 

3. Some openMosix code is an assembly and -sorry to disappoint you- but
the IA64 instruction set(s) are just different

4. The Linux kernels for IA32 and IA64 are similar but not the same. You
need to change the code not only marginally, but also structurally. 

5. No floating math in IA64 Linux kernel

there are some more issues, too, but let's stop here as it is by now
clear that just compiling on a PentiumIV will not be the easy fix, we
all hoped to just have somehow not seen. 

Moshe



On Wed, 2002-07-31 at 17:58, Michael Truog wrote:
> I know that your web site has said you do not yet have a 64 bit version. 
>  Isn't it possible to just compile on a 64bit Pentium 4 and have a 64 
> bit version of mosix.  What am I missing here?
> michael
> 
> -- 
> Michael Truog
> Software Engineer
> Signature Research Inc.
> 1122 Calumet Ave.
> Calumet, MI 49913
> 906-337-3360 (voice)
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