People these days seem to forget about the overhead of interpretters and virtual machines. If the article is correct, then the z800's running zVM emulate Intel x86 architecture in order to run Linux.
Interpretation not correct -- article playing upon ambiguity. zVM does not emulate x86. 390/Linux is a real port to the zVM virtual machine. Optionally, you can run Linux natively on the bare S/390 hardware or in an LPAR or under the Virtual Image Facility. Virtualization overhead is not a consideration here.
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People these days seem to forget about the overhead of interpretters and virtual machines. If the article is correct, then the z800's running zVM emulate Intel x86 architecture in order to run Linux.
Interpretation not correct -- article playing upon ambiguity. zVM does not emulate x86. 390/Linux is a real port to the zVM virtual machine. Optionally, you can run Linux natively on the bare S/390 hardware or in an LPAR or under the Virtual Image Facility. Virtualization overhead is not a consideration here.