Re: Re: Re: Proposal for init/kexec/hotplug format for Xen

[harry@hebutterworth.freeserve.co.uk]

You are thinking about the code differences from the point of view of the code running inside the domain.  What about the code outside the domain, for example, is the code required to remove a device from one domain and give it to another going to have to be different depending on whether the target domain has been booted yet?


> Message date : Feb 28 2005, 01:01 PM
> From : "Rusty Russell" <rusty@rustcorp.com.au>
> To : harry@hebutterworth.freeserve.co.uk
> Copy to : "Anthony Liguori" <aliguori@us.ibm.com>, "Keir Fraser" <Keir.Fraser@cl.cam.ac.uk>, "Jeremy Katz" <katzj@redhat.com>, "Xen Mailing List" <xen-devel@lists.sourceforge.net>
> Subject : Re: Re: [Xen-devel] Proposal for init/kexec/hotplug format for Xen
> 
> On Mon, 2005-02-28 at 13:22 +0100, harry@hebutterworth.freeserve.co.uk
> wrote:
> > Why have two separate mechanisms when the mechanism required for
> > hotplug can be used to build the tree from scratch?
> 
> The only difference would be the transport for hotplug events, which is
> infrastructure which needs to exist anyway to transport other
> information between domains.
> 
> We'll see when the code's finished, but I see the code being:
> 
> 	__init boot_devtree_setup()
> 	{
> 		devtree_add(boot_devtree_ptr);
> 	}
> 
> 	hotplug_receive_event()
> 	{
> 		receive data
> 		if (op == ADD)
> 			devtree_add(data);
> 		else if (op == REMOVE)
> 			devtree_remove(data);
> 	}
> 
> ie. the mere difference in transport should be a few lines of code.
> Rusty.
> -- 
> A bad analogy is like a leaky screwdriver -- Richard Braakman
> 
> 
> 

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