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

  • To: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
  • From: Juergen Gross <juergen.gross@xxxxxxxxxxxxxx>
  • Date: Fri, 20 Jul 2012 07:54:39 +0200
  • Cc: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, Keir Fraser <keir.xen@xxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxx>
  • Delivery-date: Fri, 20 Jul 2012 05:55:37 +0000
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  • List-id: Xen developer discussion <xen-devel.lists.xen.org>

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 Gross                 Principal Developer Operating Systems
PDG ES&S SWE OS6                       Telephone: +49 (0) 89 3222 2967
Fujitsu Technology Solutions              e-mail: juergen.gross@xxxxxxxxxxxxxx
Domagkstr. 28                           Internet: ts.fujitsu.com
D-80807 Muenchen                 Company details: ts.fujitsu.com/imprint.html

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