Re: [Xen-devel] Updates to shared APIs

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

Not a bad idea, although I will say that domU interfaces are guaranteed to
maintain backward compatibility (although this would be easier with detailed
interface documentation, of course). And the sysctl/domctl changes should
largely be hidden in the low-level libraries and tools.

 -- Keir

On 19/11/07 10:30, "John Levon" <levon@xxxxxxxxxxxxxxxxx> wrote:

> 
> I meant to make this request at the summit but never got around to it:
> 
> One of the big problems we have is following the rapid development of
> upstream xen-unstable whilst working on our current base. It's simply
> impossible to keep abreast of every change in upstream, especially when
> the vast majority don't impact the Solaris case at all. We review
> changes when we jump to a new base (as we're doing now for 3.1.2), but
> this is not ideal for a host of obvious reasons.
> 
> Would it be feasible to start some kind of change log for things
> affecting dom0 and domU implementations? That is, such a patch would
> need to list itself on a wiki page (or something else) before it goes
> into the main tree as a point of policy.
> 
> Wherever possible I'd be glad to help out (documenting the
> change on that page, for example).
> 
> The kinds of changes that this would apply to include:
> 
> - any new hypercalls
> - all changes to domctl/sysctl but *especially* incompatible ones
> - any behaviour changing domain builder stuff (new ELF feature flags etc.)
> - all changes to inter-domain protocols
> - new file formats (core dump, save/restore, etc.)
> - any new code that thinks there's text inside /proc ;)
> - maybe significant reworks such as Dan Berrange's qemu/text console stuff
> 
> With documentation, this would also start to form the basis of a
> better-documented hypervisor API, at least for 'new' bits.
> 
> Comments?
> 
> thanks,
> john
> 
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