From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dan Magenheimer <dan.magenheimer@oracle.com>
Subject: Re: [PATCH] xl.cfg: document the maxmem= option
Date: Mon, 7 May 2012 09:37:23 -0700 (PDT)
Message-ID: <aefbf18f-3bfe-4af2-bc49-2488bc9cc490@default>
References: <c414728d0d12f1c3e416.1336159902@probook.site>
	<20120504194222.GA28634@phenom.dumpdata.com>
	<20120504201802.GA16466@aepfle.de>
	<1336296932.5933.9.camel@cthulhu.hellion.org.uk>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <1336296932.5933.9.camel@cthulhu.hellion.org.uk>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Sender: xen-devel-bounces@lists.xen.org
Errors-To: xen-devel-bounces@lists.xen.org
To: Ian Campbell <Ian.Campbell@citrix.com>, Olaf Hering <olaf@aepfle.de>
Cc: xen-devel@lists.xensource.com, Konrad Wilk <konrad.wilk@oracle.com>
List-Id: xen-devel@lists.xenproject.org

> From: Ian Campbell [mailto:Ian.Campbell@citrix.com]
> Sent: Sunday, May 06, 2012 3:36 AM
> To: Olaf Hering
> Cc: xen-devel@lists.xensource.com; Konrad Rzeszutek Wilk
> Subject: Re: [Xen-devel] [PATCH] xl.cfg: document the maxmem= option
> 
> On Fri, 2012-05-04 at 16:18 -0400, Olaf Hering wrote:
> > On Fri, May 04, Konrad Rzeszutek Wilk wrote:
> >
> > > On Fri, May 04, 2012 at 09:31:42PM +0200, Olaf Hering wrote:
> > > > # HG changeset patch
> > > > # User Olaf Hering <olaf@aepfle.de>
> > > > # Date 1336159720 -7200
> > > > # Node ID c414728d0d12f1c3e416e40cceefca2f0b00578e
> > > > # Parent  8f556a70ae0bef47e242f9e7be0a054769fc8277
> > > > xl.cfg: document the maxmem= option
> > > >
> > > > Signed-off-by: Olaf Hering <olaf@aepfle.de>
> > > >
> > > > diff -r 8f556a70ae0b -r c414728d0d12 docs/man/xl.cfg.pod.5
> > > > --- a/docs/man/xl.cfg.pod.5
> > > > +++ b/docs/man/xl.cfg.pod.5
> > > > @@ -484,6 +484,14 @@ are not using hardware assisted paging (
> > > >  mode) and your guest workload consists of a a very large number of
> > > >  similar processes then increasing this value may improve performance.
> > > >
> > > > +=item B<maxmem=MBYTES>
> > > > +
> > > > +Specifies the maximum amount of memory the HVM guest can ever see.

can _ever_ see...

What about guest OS's that support hotplug memory?

Also, a subtle point, but is this the maximum physical address that
will contain read/write pages or the maximum amount of RAM that the
guest OS should be prepared to map as read/writeable (e.g. after
subtracting off reserved e820 ranges) or ???