From: Ian Campbell <Ian.Campbell@citrix.com>
To: Ian Jackson <Ian.Jackson@eu.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>,
xen-devel <xen-devel@lists.xen.org>,
Dario Faggioli <raistlin@linux.it>
Subject: Re: [PATCH 1 of 3 v5/leftover] libxl: enable automatic placement of guests on NUMA nodes [and 1 more messages]
Date: Wed, 18 Jul 2012 14:12:25 +0100 [thread overview]
Message-ID: <1342617145.26734.30.camel@zakaz.uk.xensource.com> (raw)
In-Reply-To: <20486.38305.369947.333430@mariner.uk.xensource.com>
On Wed, 2012-07-18 at 11:53 +0100, Ian Jackson wrote:
> Dario Faggioli writes ("Re: [PATCH 1 of 3 v5/leftover] libxl: enable automatic placement of guests on NUMA nodes [and 1 more messages]"):
> ...
> > So basically I'm saying that it does have that property but that is
> > bringing benefits right now, and we have all the knobs to limit its
> > potential nasty effects for future (bigger) system at any time.
>
> I think that it is essential that we do not have a situation where the
> default behaviour is ever to hang while it searches zillions of
> combinations. That would be a release critical bug IMO.
>
> So I don't think "we will fix this after the series goes in" is
> acceptable. We should not be introducing new RC bugs during the
> freeze.
If this is the case then we need to consider that we may need to release
4.2.0 without this NUMA awareness unless we can find a simple
fix/bandaid soon.
I don't want this freeze to drag on for weeks or months while we sort
this out.
I'd like to see a solution agreed and implemented ASAP or else we need
to seriously consider deferring the whole thing to 4.3 (perhaps with a
4.2.1 backport)
Ian.
next prev parent reply other threads:[~2012-07-18 13:12 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-10 15:03 [PATCH 0 of 3 v4/leftover] Automatic NUMA placement for xl Dario Faggioli
2012-07-10 15:03 ` [PATCH 1 of 3 v4/leftover] libxl: enable automatic placement of guests on NUMA nodes Dario Faggioli
2012-07-17 15:55 ` Ian Jackson
2012-07-16 17:13 ` [PATCH 0 of 3 v5/leftover] Automatic NUMA placement for xl Dario Faggioli
2012-07-16 17:13 ` [PATCH 1 of 3 v5/leftover] libxl: enable automatic placement of guests on NUMA nodes Dario Faggioli
2012-07-17 18:04 ` [PATCH 1 of 3 v5/leftover] libxl: enable automatic placement of guests on NUMA nodes [and 1 more messages] Ian Jackson
2012-07-17 20:23 ` Ian Campbell
2012-07-18 0:31 ` Dario Faggioli
2012-07-18 10:44 ` Ian Jackson
2012-07-18 0:22 ` Dario Faggioli
2012-07-18 8:27 ` Dario Faggioli
2012-07-18 9:13 ` Ian Campbell
2012-07-18 9:43 ` Dario Faggioli
2012-07-18 9:53 ` Ian Campbell
2012-07-18 10:08 ` Dario Faggioli
2012-07-18 11:00 ` Ian Jackson
2012-07-18 13:14 ` Ian Campbell
2012-07-18 13:35 ` Dario Faggioli
2012-07-19 12:47 ` Dario Faggioli
2012-07-18 13:40 ` Andre Przywara
2012-07-18 13:54 ` Juergen Gross
2012-07-18 14:00 ` Dario Faggioli
2012-07-19 14:43 ` Ian Jackson
2012-07-19 18:37 ` Andre Przywara
2012-07-21 1:46 ` Dario Faggioli
2012-07-18 10:53 ` Ian Jackson
2012-07-18 13:12 ` Ian Campbell [this message]
2012-07-18 9:47 ` Dario Faggioli
2012-07-19 12:21 ` [PATCH 1 of 3 v5/leftover] libxl: enable automatic placement of guests on NUMA nodes Andre Przywara
2012-07-19 14:22 ` Dario Faggioli
2012-07-20 8:19 ` Andre Przywara
2012-07-20 9:39 ` Dario Faggioli
2012-07-20 10:01 ` Dario Faggioli
2012-07-20 8:20 ` Dario Faggioli
2012-07-20 8:26 ` Andre Przywara
2012-07-20 8:38 ` Juergen Gross
2012-07-20 9:52 ` Dario Faggioli
2012-07-20 9:56 ` Juergen Gross
2012-07-20 9:44 ` Dario Faggioli
2012-07-20 11:47 ` Andre Przywara
2012-07-20 12:54 ` Dario Faggioli
2012-07-20 13:07 ` Andre Przywara
2012-07-21 1:44 ` Dario Faggioli
2012-07-16 17:13 ` [PATCH 2 of 3 v5/leftover] libxl: have NUMA placement deal with cpupools Dario Faggioli
2012-07-16 17:13 ` [PATCH 3 of 3 v5/leftover] Some automatic NUMA placement documentation Dario Faggioli
2012-07-20 11:07 ` [PATCH 0 of 3 v5/leftover] Automatic NUMA placement for xl David Vrabel
2012-07-20 11:43 ` Andre Przywara
2012-07-20 12:00 ` Ian Campbell
2012-07-20 12:08 ` Ian Campbell
2012-07-23 10:38 ` Dario Faggioli
2012-07-23 10:42 ` Ian Campbell
2012-07-23 15:31 ` Dario Faggioli
2012-07-23 10:23 ` Dario Faggioli
2012-07-20 12:14 ` David Vrabel
2012-07-17 15:59 ` [PATCH 1 of 3 v4/leftover] libxl: enable automatic placement of guests on NUMA nodes Ian Campbell
2012-07-17 18:01 ` Ian Jackson
2012-07-17 22:15 ` Dario Faggioli
2012-07-10 15:03 ` [PATCH 2 of 3 v4/leftover] libxl: have NUMA placement deal with cpupools Dario Faggioli
2012-07-10 15:03 ` [PATCH 3 of 3 v4/leftover] Some automatic NUMA placement documentation Dario Faggioli
2012-07-16 17:03 ` [PATCH 0 of 3 v4/leftover] Automatic NUMA placement for xl Dario Faggioli
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