From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christian Limpach <christian.limpach@gmail.com>
Subject: Re: watch event for die domain ?
Date: Sun, 11 Sep 2005 00:53:37 +0100
Message-ID: <3d8eece205091016531b985986@mail.gmail.com>
References: <5d7aca95050910071574eed9b@mail.gmail.com>
Reply-To: Christian.Limpach@cl.cam.ac.uk
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <5d7aca95050910071574eed9b@mail.gmail.com>
Content-Disposition: inline
List-Unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: nahieu@gmail.com
Cc: xen-devel@lists.xensource.com
List-Id: xen-devel@lists.xenproject.org

On 9/10/05, NAHieu <nahieu@gmail.com> wrote:
> I am writing a small application to watch for xenstore events. I want
> to know when a specific domain shutdown or reboot. It is best to watch
> it via xenbus interface, but how? Is there any event or node can give
> me such an event?

You can have a watch on @releaseDomain, the watch will fire whenever
xenstored unmaps the store page it has mapped from the domain.=20
There's also @introduceDomain for when xenstored maps the page after
the domain was created.

> If not, I must periodically scan the domains (using libxc interface)
> to detect if a domain dies, but that is not as good as xenbus
> approach.

Yeah, polling is definitely not the way to go ;-)

     christian