From: Tim Deegan <tim@xen.org>
To: Dan Magenheimer <dan.magenheimer@oracle.com>
Cc: Sander Eikelenboom <linux@eikelenboom.it>,
xen-devel@lists.xensource.com,
Alexander Bienzeisler <chosi@amd.co.at>,
Ian Campbell <Ian.Campbell@citrix.com>
Subject: Re: can not use all available memory
Date: Mon, 26 Nov 2012 21:32:49 +0000 [thread overview]
Message-ID: <20121126213249.GA37842@ocelot.phlegethon.org> (raw)
In-Reply-To: <b7ad6baf-e085-4ef7-860e-f9755b756339@default>
At 12:37 -0800 on 26 Nov (1353933449), Dan Magenheimer wrote:
> > > I could be wrong (and I am confident someone will correct me if I am) but
> > > I think this is because the Citrix memory model assumes there is an
> > > inference-driven policy engine for load-balancing memory across competing
> > > virtual machines ("squeezed"). I suspect squeezed returns unallocated
> > > xen "free" memory to dom0.
>
> I forgot... it is called Dynamic Memory Control (DMC), not squeezed
> in the XenServer product.
AFAIK XenServer uses dom0_mem= and doesn't balloon com0 after boot time.
The idea of ballooning all free memory into dom0 is a xl-ism, inherited
from xend, and not really a "Citrix" one. It's useful if you've
installed xen on a machine where dom0 is otherwise your main OS, but not
particularly for a dedicated platform.
Tim.
next prev parent reply other threads:[~2012-11-26 21:32 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-23 11:35 can not use all available memory Alexander Bienzeisler
2012-11-23 11:52 ` Pasi Kärkkäinen
2012-11-23 12:06 ` Alexander Bienzeisler
2012-11-23 12:21 ` Ian Campbell
2012-11-23 12:28 ` Pasi Kärkkäinen
2012-11-23 12:33 ` Ian Campbell
2012-11-23 12:41 ` Pasi Kärkkäinen
2012-11-23 12:47 ` Ian Campbell
2012-11-23 12:55 ` Pasi Kärkkäinen
2012-11-23 13:15 ` Ian Campbell
2012-11-23 13:29 ` Pasi Kärkkäinen
2012-11-23 13:33 ` Ian Campbell
2012-11-26 16:58 ` Dan Magenheimer
2012-11-26 18:25 ` Sander Eikelenboom
2012-11-26 20:20 ` Dan Magenheimer
2012-11-26 20:24 ` Pasi Kärkkäinen
2012-11-26 20:37 ` Dan Magenheimer
2012-11-26 21:32 ` Tim Deegan [this message]
2012-11-26 21:47 ` Dan Magenheimer
2012-11-27 2:52 ` William Pitcock
2012-11-27 10:52 ` Ian Campbell
2012-11-26 20:35 ` Sander Eikelenboom
2012-11-23 12:46 ` Alexander Bienzeisler
-- strict thread matches above, loose matches on Subject: below --
2012-11-23 11:38 Alexander Bienzeisler
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