Re: Regarding Xenstore/Xenbus

["Andrew D. Ball" <aball@linux.vnet.ibm.com>]

I think that's right.  Look into using libxenstore inside of the domU --
I think there are functions to do what you want there.

Peace.
Andrew


On Sun, 2006-11-19 at 03:09 -0500, Umar Farooq Minhas wrote:
> Hi everyone,
>  
> I have installed Xen on OpenSUSE Linux 10.1 and am just starting to
> develop with Xen. I want to implement a very straightforward
> application in domUs which simply gets notified whenever a resource
> provisioning change (specifically for cpu/memory allocation) is made
> for that particular domU using for example xm mem-set. From the
> readings that I have done so far it seems that since xenstore is a
> shared database between all the domains which keeps track of domain
> specific values(including values of allocated resources) and that it
> can be accessed through xenbus from domUs so what I need to do is to
> write a program that would access xenstore from withing that domU over
> xenbus. Or more specifically I will have to register a 'watch' in
> xenstore (just as the balloon driver does) to monitor memory values. I
> don't know whether this is true or not. I would greatly appreciate if
> someone could verify this understanding or point me in the right
> direction. Also if this is true some pointers to start developing with
> xenbus/xenstore would be very helpful.
>  
> A prompt response will be appreciated as I am running on a deadline :)
>  
> Thanks.
> -Umar
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