Re: [Xen-devel] Backport requests of cs 23420..23423 for 4.0 and 4.1

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 20/07/12 06:54, Juergen Gross wrote:
> Am 19.07.2012 17:11, schrieb Ian Jackson:
>> Keir Fraser writes ("Re: [Xen-devel] Backport requests of cs 23420..23423 
>> for 4.0 and 4.1"):
>>> On 13/07/2012 07:08, "Juergen Gross"<juergen.gross@xxxxxxxxxxxxxx>  wrote:
>>>> I would like to request to include these changesets in 4.0 and
>>>> 4.1. The backport is quite trivial, I can send patches if you are
>>>> willing to take them.
>>> Will need an Ack from George and then patches applied by (or at least an Ack
>>> from) a tools maintainer.
>> Thanks for replying Keir, but I'm rather queasy about this.
>>
>> These patches have not been in any released version of Xen and are
>> fairly substantial.  I would say that we should not backport anything
>> that isn't a critical bugfix which hasn't been sitting in a released
>> version of Xen for a while; and a new feature ought to be considered
>> very carefully.
>>
>> Now maybe the unfortunately extended 4.2 release cycle may mean we
>> should relax this rule but I'd prefer to see a clear justification for
>> why this is important to retrofit to 4.1.
> Live migration is a main high-availability feature of our next release.
>
> A performance degradation of 10% and more will not be easily accepted for
> a system which is expected to be up 24/7.
>
> I assume there is a reason the patches are in XCP right now. :-)
>
>
> Juergen
>

XCP is basically XenServer minus the propriety stuff, so it uses 'our'
Xen amongst other things.

-- 
Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer
T: +44 (0)1223 225 900, http://www.citrix.com


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