From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dario Faggioli <raistlin@linux.it>
Subject: Re: [PATCH 00 of 10 v3] Automatic NUMA placement for xl
Date: Mon, 09 Jul 2012 16:32:43 +0200
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To: Ian Campbell <ian.campbell@citrix.com>
Cc: Andre Przywara <andre.przywara@amd.com>, Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>, George Dunlap <George.Dunlap@eu.citrix.com>, Juergen Gross <juergen.gross@ts.fujitsu.com>, Ian Jackson <Ian.Jackson@eu.citrix.com>, "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>, Roger Pau Monne <roger.pau@citrix.com>
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On Sun, 2012-07-08 at 12:32 -0600, Ian Campbell wrote:=20
> On Wed, 2012-07-04 at 12:17 -0400, Dario Faggioli wrote:
> > Hello,
> >=20
> > Third version of the NUMA placement series Xen 4.2.
>=20
> Starting an HVM guest (although I don't suppose it is HVM specific) on a
> none NUMA system I get this:
>=20
>         libxl: debug: libxl_numa.c:270:libxl__get_numa_candidates: only 1=
 node. no placement required
>         libxl: detail: libxl_dom.c:175:numa_place_domain: 0 NUMA placemen=
t candidates found
>         libxl: notice: libxl_dom.c:180:numa_place_domain: NUMA placement =
failed, performance might be affected
>        =20
Mmm... I see. No, it's not HVM specific and you're right, it does not
make much sense.

> this being a non-NUMA system I suppose it is not the end of the world.
> It'd be nice to avoid the warning though -- perhaps
> libxl__get_numa_candidates should either not special case single node
> systems or it should manually return the trivial candidate set?
>=20
Yep, I can definitely do that, along with the other fix you suggested
and the wording of the doc patch and resend the last three.

Thanks and Regards,
Dario

--=20
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://retis.sssup.it/people/faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)



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