Re: [Xen-devel] What's XenBus and what's its relation with XenStore

["Tej Parkash" <bewith.tej@xxxxxxxxx>]

On Fri, Jul 11, 2008 at 8:39 PM, Mark Williamson
<mark.williamson@xxxxxxxxxxxx> wrote:
> On Thursday 10 July 2008, Tom Creck wrote:
>> Hello, I'm a new comer to understanding Xen internals.
>>
>> I want to know what is XenBus.
>> I wonder where can I find materials explaining the internal of XenBus.
>> Does it relate to XenStore?
>
> Xenstore is a "registry"-like hierarchical store of domain configuration data.
> It's used to do various stuff, including negotiating connections to device
> drivers at start-up time, asking a domain to adjust its memory footprint or
> shutdown, etc.  It's not a static store of information - domains can watch
> for changes to it and respond accordingly.
>
> Xenbus is a Linux interface to Xenstore.  This looks like a kind of "bus" to
> Linux, which can be "scanned" to reveal what virtual devices are available.
> It provides an API for paravirtualised drivers to receive notification and
> information from Xenstore and to write data back to it.

Can we say that (XEN bus + Xenstore) is an alternative way to ( XEND +
xm ) to find the information regarding the virtulised XEN environment.


>
> Cheers,
> Mark
>
> --
> Push Me Pull You - Distributed SCM tool (http://www.cl.cam.ac.uk/~maw48/pmpu/)
>
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