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Re: [Xen-devel] Will Xen 4.0 release use the pv-ops kernel despite it's

To: "Zhang, Xiantao" <xiantao.zhang@xxxxxxxxx>, Tom Rotenberg <tom.rotenberg@xxxxxxxxx>
Subject: Re: [Xen-devel] Will Xen 4.0 release use the pv-ops kernel despite it's performance hit
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Mon, 21 Dec 2009 10:55:48 +0000
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On 21/12/2009 06:39, "Zhang, Xiantao" <xiantao.zhang@xxxxxxxxx> wrote:

>> OK.
>> 
>> I just thought i saw Jeremy's mail about changing the APIC logic in
>> Xen to conform to the pv-ops kernel, which i thought will cause new
>> Xen not to work with old dom0 kernel. This isn't the case?
> 
> As I know, new Xen should work with old dom0 after APIC logic changes, but new
> dom0 may not be able to run on old Xen. To make new dom0 work with old Xen
> hypervisor, has to backport two small patches Cset#20491 and Cset20509.
> Keir, 
>    Do you think we should backport them to Xen3.4-testing tree ? Since logic
> has no any change, and just added a new hypercall, I think they should be good
> to xen-3.4-testing tree ?  :)

Yes, go ahead. They do require backporting (and testing) -- they don't apply
as-is.

 -- Keir



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