Re: [Xen-devel] Status of Nested Virt in 4.4 (Was: Re: Xen 4.4 development update)

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2014-01-17 at 02:16 +0000, Zhang, Yang Z wrote:
> As Andrew said, nested still in experimental stage, because there are
> still lots of scenarios I am not covered in my testing. So it may not
> accurate to say it is good supported. But I hope people know that the
> nested is ready to use now. And encourage them to try it and report
> bug to us to push nested move forward. 

Perhaps we could say it is "tech preview" rather than "experimental"?

What would really help is some clear guidance (i.e. docs, wiki page, a
blog post or more than one of these) on:
      * what configurations (L1 hyp/L2 guest) are supposed to work, are
        tested and are considered Supported by you guys.
      * what scenarios are expected to work, but have not been tested
        (bug/success reports welcome etc)
      * what scenarios are expected not to work but which we would like
        to support at some point or are actively working on adding
        support for
      * what scenarios are not expected to work and no one is working on

I think documenting the things toward the top end of that list would be
most valuable, the last one could be quite a long list ("everything
else") and is maybe a bit silly to try and enumerate.

Some docs and a blog post to raise awareness of the feature would likely
help push things forwards, do you think you could put something
together? For the docs either send a docs patch or write something on
the wiki (email me your wiki userid if you need to be granted write
access), for a blog post contact the publicity@ list.

You could also consider writing some instructions for test days so that
the community can do some testing, it also a good way to gain visibility
for a feature. It's probably too late to get that done for the one on
Monday[0] but you should coordinate with Russ & Dario about a future one
(a test day dedicated to nested virt is even a possibility)

Ian.

[0] http://wiki.xen.org/wiki/Xen_Test_Days  
        
ttp://www.xenproject.org/about/events/viewevent/90-xen-test-day-for-4-4-rc2.html
    http://wiki.xen.org/wiki/Xen_4.4_RC2_test_instructions
    


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