The vmkernel is not BSD! It is a proprietary kernel completely developed in-house. Also, ESX definitely does not "run" on Linux. The Red Hat 7.2 is used as a bootstrap loader for the vmkernel. The Red Hat installation is the console OS (vmnix) and it runs a "privileged guest" of the vmkernel after the kernel starts. To say that ESX runs on Linux would be like saying Windows 2000 "runs" on ntldr.
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The vmkernel is not BSD! It is a proprietary kernel completely developed in-house. Also, ESX definitely does not "run" on Linux. The Red Hat 7.2 is used as a bootstrap loader for the vmkernel. The Red Hat installation is the console OS (vmnix) and it runs a "privileged guest" of the vmkernel after the kernel starts. To say that ESX runs on Linux would be like saying Windows 2000 "runs" on ntldr.