Re: ABI coupling to hypervisors via CONFIG_PARAVIRT

From: Linus Torvalds
Date: Fri Mar 09 2007 - 16:09:06 EST




On Fri, 9 Mar 2007, Ingo Molnar wrote:
>
> _new kernel must not break on an older hypervisor_

Total red herring. AGAIN.

The paravirt_ops isn't a 1:1 hypervisor ABI.

If we change paravirt_ops to be higher-level ops (as we should), yes, the
paravirt->VMI layer needs to be extended to have the "higher->lower"
translation. But at no point did we break the hypervisor.

Anyway, please don't even bother cc'ing or replying to me any more.

Linus
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