WARNING - OLD ARCHIVES

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/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

Re: [Xen-users] Problem for "xm create": "kernel: Setting mem allocation

To: "Ulrich Windl" <ulrich.windl@xxxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-users] Problem for "xm create": "kernel: Setting mem allocation to ..."
From: harm <harmweites@xxxxxxxxx>
Date: Thu, 19 Oct 2006 16:48:02 +0200
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date: Thu, 19 Oct 2006 07:48:51 -0700
Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:references; b=MnaJ+EXGNC6dehr4AV7GdjTDf3ImEp227Rj0b0bk5q3XntcCjsK+1oCHArvjSaeGOitUmBU3NgGPY725eTOaMgARNacCd1FnLKlFHchZllCkdtmUk8LXfkggZfabFk8mKswoPYmWf3B0TlE07oZNXOS126RC8ni9cWhk6qW8Gq4=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <4537AA20.8304.10001F2D@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <4537AA20.8304.10001F2D@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
there is a balloon setting to specify the ram usage by Dom0, look in your /etc/xend-config.sxp near the end of the file.
Your error msg indicates there is not enough free ram.

You can check it with xm list, that will show the current mem usage with Xen. Free -h will show system mem usage.

On 10/19/06, Ulrich Windl <ulrich.windl@xxxxxxxxxxxxxxxxxxxx> wrote:
Hi,

When trying to boot a freshly created VM, nothing seems to happen, but Dom0
repeats  messages like
kernel: Setting mem allocation to ... kIB
while "..." is some large number like this:
Oct 19 15:55:33 rkdvmso1 kernel: Setting mem allocation to 816764 kiB
Oct 19 15:55:41 rkdvmso1 kernel: Setting mem allocation to 816764 kiB
Oct 19 15:55:46 rkdvmso1 kernel: Setting mem allocation to 816764 kiB
Oct 19 15:55:54 rkdvmso1 kernel: Setting mem allocation to 816764 kiB

Eventually I see (after "xm create"):
Error: The privileged domain did not balloon!

Now I think the error message on the console and in the syslog could be improved:
Is Dom0 kernel retrying, how much is available (I assume less than demanded).
Could this be a NUMA problem?

A "# xm mem-set 0 256" to reduce the mem of Domain-0, but the VM wouldn't start,
and Domain-0 re-allocated the previous size (556M)

How do I limit the maximum mem for Domain-0, so that DomUs have enough RAM left
over for them?

Regards,
Ulrich


_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users