ia32 kernel on amd64 box?
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Quoted 3 lines · Andreas Jaeger
Any 32-bit x86 kernel should work on an AMD Opteron machine. The only question is whether all drivers are supported. Red Hat 7.2 might not have support for all the hardware that is in an AMD Opteron ystem.
Actually some things will not work with older kernels because the Linux kernel does explicit CPUID model checks in a few places. But it is relative obscure stuff and unlikely to be a problem in practice.
-Andi