Linked by David Adams on Wed 7th Sep 2011 21:15 UTC, submitted by sjvn
Ubuntu, Kubuntu, Xubuntu Sources close to Canonical and IBM are telling me that Ubuntu may soon be certified on IBM's System p mini-computers and blades and System z mainframes.
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RE[2]: Misleading?
by Lennie on Wed 7th Sep 2011 23:06 UTC in reply to "RE: Misleading?"
Lennie
Member since:
2007-09-22

RedHat and Suse don't run baremetal either.

But on System Z, as I understand it, most operating systems (must ?) use paravirtualization.

Which means special drivers for the special virtual devices which are available on system Z.

Reply Parent Score: 2

RE[3]: Misleading?
by Nth_Man on Fri 9th Sep 2011 17:24 in reply to "RE[2]: Misleading?"
Nth_Man Member since:
2010-05-16

RedHat and Suse don't run baremetal either.
Linux can run on the mainframe, natively, baremetal.

In the article, one comment says "IBM provides IFL which is a chip specifically for running Linux on the mainframe with or without zVM". Then we can see it graphically in
http://www-03.ibm.com/systems/resources/systems_z_os_linux_solution...

That image is from the page http://www-03.ibm.com/systems/z/os/linux/solutions/ifl.html, where you can search for the text "native Linux".

Reply Parent Score: 2

RE[4]: Misleading?
by Lennie on Fri 9th Sep 2011 18:47 in reply to "RE[3]: Misleading?"
Lennie Member since:
2007-09-22

Ohh, I didn't know that, seems they do that since 2000.

A special chip ?

I guess that means a special CPU-microcode ?

Yep, just checked on Wikipedia it says:
"The specialty processors are all identical and IBM locks out certain functions based on what the processor is characterized as" ... "reduced cost"

Seems the special chips are optional, has stuff disabled so you can only use it for Linux but at a reduced cost.

Reply Parent Score: 2

RE[4]: Misleading?
by Kebabbert on Sat 10th Sep 2011 12:01 in reply to "RE[3]: Misleading?"
Kebabbert Member since:
2007-07-27

I read from several places that all IBM Mainframe OSes are running ontop a hypervisor, that no OS runs baremetal.

Are you sure that Linux can run baremetal on IBM Mainframes? Do you have a reference or link?

Reply Parent Score: 2