24 May
2020
24 May
'20
3:04 p.m.
On Sun, May 24, 2020 at 3:47 PM Peter Coghlan via cctalk <
cctalk at classiccmp.org> wrote:
Sorry, it was VM/370, so the successor to CP/67 with virtual memory added.
https://akapugs.blog/2018/05/12/370unixpart2/
Warner
On Sun, 24 May 2020 at 15:18:34 -0600, Warner Losh
wrote:
I mean that 4th edition UNIX ran under a hypervisor in MERT in 74 as a
process in that real-time executive.
Oh. I thought maybe you meant Unix was able to do virtualization.
What's special about being able to run under a hypervisor? If the
hypervisor does it's job right, whatever is running under it should
not be aware that it is not running directly on hardware.
MERT was more a real-time executive than a hypervisor, so there was some
work needed to port UNIX to run as a process in MERT. The port was the unix
kernel, so that programs could have a UNIX API. It wasn't a pure
hypervisor, though, since a number of changes were required to Unix itself
to cope with running in what we'd likely call a paravirtualized environment.
The topic for my talk next week. Unix had virtualization in 74. The
second
Unix port ran under OS/360's VM in 78.
What do you mean by "Unix had virtualization"?
Come to think
of it, what do you mean by "OS/360's VM"?
IBM's standard VM/360. Sorry for the confusion.
CP/67 or something like that maybe? I don't think there was a VM/360
either.