From: Mark.Jac...@custserv.com
Subject: OS/390 Port
Date: 2000/07/01
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Have you noticed that LINUX has been ported to the OS/390 platform? Look at
http://www.s390.ibm.com/linux/ for details.
How hard would it be to do the same for one of the bsd's?
Mark Jacobs
Technical Services
Time Customer Service - Tampa, FL
------------------------------------------------------
"They couldn't hit an elephant at this dist-"
- Union General John Sedgewick, Last Words - 1864
From: so...@wheel.dk ("Soren S. Jorvang")
Subject: Re: OS/390 Port
Date: 2000/07/01
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On Fri, Jun 30, 2000 at 03:23:00PM -0400, Mark.Jac...@custserv.com wrote:
> Have you noticed that LINUX has been ported to the OS/390 platform? Look at
> http://www.s390.ibm.com/linux/ for details.
>
> How hard would it be to do the same for one of the bsd's?
It's doable. The 390 architecture is quite well-specified (big,
heavy books etc.) and there's even the Linux code to look at too,
of course.
Go for it :-)
--
Soren
From: jmayn...@conmicro.cx (Jay Maynard)
Subject: Re: OS/390 Port
Date: 2000/07/01
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(30 Jun 2000 20:46:33 GMT)
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On Fri, Jun 30, 2000 at 09:26:34PM +0200, Soren S. Jorvang wrote:
> On Fri, Jun 30, 2000 at 03:23:00PM -0400, Mark.Jac...@custserv.com wrote:
> > Have you noticed that LINUX has been ported to the OS/390 platform? Look at
> > http://www.s390.ibm.com/linux/ for details.
> > How hard would it be to do the same for one of the bsd's?
> It's doable. The 390 architecture is quite well-specified (big,
> heavy books etc.) and there's even the Linux code to look at too,
> of course.
Not only that, but there's even a quite functional emulator that runs on
real-people hardware (though, right now, it's Linux-specific, what it really
needs is POSIX threads, so changes to make it run on BSD would be doable, I
think). Hercules emulates the ESA/390 and S/370 architectures well enough to
run the major IBM OSes unchanged (with one exception: the assists needed for
VM/ESA aren't there). Check out http://www.conmicro.cx/hercules for the
scoop.
From: jaco...@gate.net (Mark Jacobs)
Subject: Re: OS/390 Port
Date: 2000/07/01
Message-ID: <8jjgno$120t$1@FreeBSD.csie.NCTU.edu.tw>#1/1
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I have been to two IBM presentations on Linux for OS/390, the excitement
within IBM and with many customers is very high.
IBM has provided four ways to run Linux under their hardware.
1) Bare Metal - One Linux system per S/390 machine
2) Lpar mode - LPAR (Logical Partition). Up to fifteen images in one
S/390 machine. Each image shares CPU's and channel (I/O) resources.
3) VM/ESA - Linux runs as a guest operating system's ) under IBM's
VM/ESA operating system.
4) Hipervisor - Stripped down version of VM/ESA.
Lets look at each one in order.
#1: I can think of better ways to use S/390 hardware.
#2: Useful for multiple operating systems per machine.
#3: This is the real sleeper here. One customer is running a web hosting
business running Linux under S/390 hardware. They run 1000 separate
Linux's under VM/ESA, and can clone a new image and give it to a new
customer in a matter of seconds. They charge half as much as everyone
else and make more profit. They did a cost analysis between S/390 and
Sun Workstations. The cost of the S/390 solution beat Sun at about 50
boxes.
#4: Look at #3.
Since about 80-90% of the worlds data is still behind S/390 hardware.
Multiple Linux's each running on S/390 hardware accessing host data at
speeds many times faster than the fastest lan has to be a win situation.
Mark Jacobs
From: so...@wheel.dk ("Soren S. Jorvang")
Subject: Re: OS/390 Port
Date: 2000/07/01
Message-ID: <8jkdov$1pbu$1@FreeBSD.csie.NCTU.edu.tw>#1/1
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On Fri, Jun 30, 2000 at 03:45:58PM -0500, Jay Maynard wrote:
> Not only that, but there's even a quite functional emulator that runs on
> real-people hardware (though, right now, it's Linux-specific, what it really
> needs is POSIX threads, so changes to make it run on BSD would be doable, I
I tried running it on NetBSD with only some very minor changes (except
the standalone tape copy program, which uses more than a few Linux-
specific ioctls) some time ago, and it got much of the way through the
boot process, but there were some subtle thread problem that prevented
it from working fully.
--
Soren
From: jmayn...@conmicro.cx (Jay Maynard)
Subject: Re: OS/390 Port
Date: 2000/07/01
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On Sat, Jul 01, 2000 at 11:30:24AM +0200, Soren S. Jorvang wrote:
> On Fri, Jun 30, 2000 at 03:45:58PM -0500, Jay Maynard wrote:
> > Not only that, but there's even a quite functional emulator that runs on
> > real-people hardware (though, right now, it's Linux-specific, what it really
> > needs is POSIX threads, so changes to make it run on BSD would be doable, I
> I tried running it on NetBSD with only some very minor changes (except
> the standalone tape copy program, which uses more than a few Linux-
> specific ioctls) some time ago, and it got much of the way through the
> boot process, but there were some subtle thread problem that prevented
> it from working fully.
Hercules' stated direction (due to maintenance issues) is to run on Linux,
but, as the maintainer, if it can be made to run on NetBSD (or, for that
matter, any other OS) without adding a lot of cruft, and still buildable and
runnable on Linux, those changes would be happily accepted.