[TUHS] UNIX on S/370
lm at mcvoy.com
Tue Nov 21 09:23:01 AEST 2017
On Mon, Nov 20, 2017 at 04:56:27PM -0600, Michael Parson wrote:
> 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.
Sorry, we were running Linux/370 on Hercules simulator:
which I _thought_ emulated the bare metal.
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