>>> On 1/28/2014 at 12:59 PM, Itschak Mugzach <[email protected]> wrote: 
> Afaik IFLs are not seen to z/os and z/vm lpars...

Not true.  You can _try_ to IPL z/OS in an LPAR with IFLs, but the entire LPAR 
will checkstop as soon as it hits the instruction that's been 
disabled/disallowed on an IFL.  z/VM, on the other hand, works quite nicely on 
either IFLs or CPs.

In fact, with the newer machines and newer z/VM you can define "VM Mode" LPARs 
that contain both CPs and IFLs (and other specialty engines) and use the z/VM 
CP directory to indicate what type of processors a guest should be run on.  
That means you can have your test (or even production) z/OS systems running 
under z/VM right along side Linux, each being dispatched on the appropriate 
processor for that workload.


Mark Post

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