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Re: [Xen-devel] watch event for die domain ?
| To: | nahieu@xxxxxxxxx |
|---|---|
| Subject: | Re: [Xen-devel] watch event for die domain ? |
| From: | Christian Limpach <christian.limpach@xxxxxxxxx> |
| Date: | Sun, 11 Sep 2005 00:53:37 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Sat, 10 Sep 2005 23:51:27 +0000 |
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| Reply-to: | Christian.Limpach@xxxxxxxxxxxx |
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On 9/10/05, NAHieu <nahieu@xxxxxxxxx> 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.
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
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