Thursday, January 15, 2009


And here's another mind blower: If you have a machine with a VMX enabled CPU, you boot it to RHEL5, and cat /proc/cpuinfo, everything works as expected. If you boot that same machine to RHEL4, it masks the VMX flag.

Actually, what happens is that /proc is created at boot time. The cpuinfo file is created and formatted, based up on the kernels interpretation. Sine VMX wans't around in RHEL4 days, it doesn't know how to translate the bits and bytes of the flag.

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