This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


RE: [Xen-devel] Linux mainstream balloon driver fails to grow memory= ->

To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: RE: [Xen-devel] Linux mainstream balloon driver fails to grow memory= -> maxmem=
From: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
Date: Wed, 25 Aug 2010 15:44:55 -0700 (PDT)
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Daniel Kiper <dkiper@xxxxxxxxxxxx>, Vasiliy G Tolstov <v.tolstov@xxxxxxxxx>
Delivery-date: Wed, 25 Aug 2010 15:46:42 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <be6bb3c0-28dd-4faa-9386-e3a99c99c733@default>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <a8aa7cb8-1f20-44ec-a6d5-72e991b0bb6f@default 4C731769.1050002@xxxxxxxx be6bb3c0-28dd-4faa-9386-e3a99c99c733@default>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
> So if Daniel's stuff works along with tmem, I'm not too bothered about
> fixing this known difference between 2.6.18-xen and mainstream.
> And IIRC the maxmem= parameter is required for PoD to work for Windows
> also.  IOW, this should probably be documented (any ideas where?)
> but the "old way" may best be left to obsolesce with 2.6.18-xen.

Hmmm... I spoke too soon.  We apparently have a number of customers
that use maxmem and would be upset if the functionality goes away.

> > There's a couple of experiments floating around in the tree to try to
> > honour maxmem, but they're somewhat rotted.  Its probably worth
> > trying to resurrect them though.

If you can send more information about the "experiments",
I may be able to take a look fairly soon (unless Daniel Kiper
is already looking into it).  Since the support is currently
missing from RHEL6 beta, future customers using RHEL6 as a
Xen PV guest may get very confused by what might appear to
them as a tools or Xen bug.


Xen-devel mailing list