[TUHS] UNIX on S/370
mparson at bl.org
Tue Nov 21 08:56:27 AEST 2017
On Mon, 20 Nov 2017, Larry McVoy wrote:
> On Mon, Nov 20, 2017 at 12:27:25PM -0700, arnold at skeeve.com wrote:
>> Any idea what Linux/370 does? I think it runs on bare iron.
> Pretty sure that's correct, we used to run Linux/370 on simulator to
> build BitKeeper images for it. I don't remember any VM stuff.
When I was at IBM, I had a few customers running the product I supported
under Linux on z, and what wikipedia says matches my memory of it being
able to run either on metal or as a VM:
Linux runs on standard, general purpose mainframe CPs (Central
Processors) as well as IFLs (Integrated Facility for Linux). IFLs are
mainframe processors dedicated to running Linux, either natively or
under a hypervisor (z/VM or KVM on z). Microcode restricts IFLs from
running "traditional" workloads, such as z/OS, but they are physically
identical to other z System processors. IFLs are typically less
expensive to acquire from IBM than CPs.
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