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[Xen-devel] Re: A proposal - binary

To: David Lang <dlang@xxxxxxxxxxxxxxxxxx>
Subject: [Xen-devel] Re: A proposal - binary
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Fri, 04 Aug 2006 11:38:21 -0700
Cc: Andrew Morton <akpm@xxxxxxxx>, zach@xxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, jeremy@xxxxxxxxxxxxx, simon@xxxxxxxxxxxxx, jlo@xxxxxxxxxx, greg@xxxxxxxxx, Rusty Russell <rusty@xxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, hch@xxxxxxxxxxxxx, ian.pratt@xxxxxxxxxxxxx, torvalds@xxxxxxxx
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David Lang wrote:
if it's only a source-level API this implies that when you move your host kernel from 2.6.19 to 2.6.25 you would need to recompile your 2.6.19 guest kernel to support the modifications. where are the patches going to come from to do this?

No, the low-level interface between the kernel is an ABI, which will be as stable as your hypervisor author/vendor wants it to be (which is generally "very stable"). The question is whether that low-level interface is exposed to the rest of the kernel directly, or hidden behind a kernel-internal source-level API.

   J

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