linux-kernel - Re: A proposal

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Message-Id: <1154647835.23655.161.camel@localhost.localdomain>
Date:	Fri, 04 Aug 2006 00:30:35 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Zachary Amsden <zach@...are.com>
Cc:	Greg KH <greg@...ah.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...l.org>,
	Andrew Morton <akpm@...l.org>,
	Christoph Hellwig <hch@...radead.org>,
	Rusty Russell <rusty@...tcorp.com.au>, Jack Lo <jlo@...are.com>
Subject: Re: A proposal - binary

Ar Iau, 2006-08-03 am 15:31 -0700, ysgrifennodd Zachary Amsden:
> Alan Cox wrote:
> > Could have fooled me. It seems to work for the IBM Mainframe people
> > really well. 
>Yes, but not because of source compatibility.  It works because the 
> hypervisor layer is actually architected in the hardware.

The hardware has nothing to do with it. It works because the hypervisor
API has a spec and is maintained compatibly. Its not entirely hardware
architected either, it has chunks of interfaces that are not present
hardware level or not meaningful at that level - the paging assists for
example are purely a hypervisor interface as are hipersockets.

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