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Re: [Xen-devel] Xen 4.3 development update

On 11/04/13 10:33, Ian Campbell wrote:
On Thu, 2013-04-11 at 10:28 +0100, George Dunlap wrote:
On 10/04/13 17:41, Konrad Rzeszutek Wilk wrote:
= Timeline =

We are planning on a 9-month release cycle.  Based on that, below are
our estimated dates:
* Feature freeze: 25 March 2013
* Code freezing point: 15 April 2013
Is it possible to extend this? One of the reviewers (Ian) is just
now able to look at code and review. That means the developers have
only 3 business days to repost the changes.
So when I said "freezing point", I meant, "we will start rejecting
features".  Each feature will need to be considered individually.  I
think, for example, that PVH is not going to make it -- it touches too
much code, and is just not in good enough shape to get in as it is.  But
AFAICT the TMEM stuff should be fine next week.

IanC knows that he's on the hot path, and so will be working double-time
over the next few days to review / commit patches.
FWIW for the tmem stuff specifically IanJ seems to have a handle on the
review so it's not high in my queue.

We had a talk yesterday about the Linux stubdomain stuff -- that's a bit
less clear.  Changes to libxl should be in "linux-stubdom-only" paths,
so little risk of breaking libxl functionality.  On the other hand, it
makes a lot of changes to the build system, adding moderate risk to an
important component; and it hasn't had wide public testing yet, so
there's no telling how reliable it will be.  On the other other hand,
it's a blocker for being able to switch to qemu-upstream by default,
which was one of our key goals for 4.3; that may or may not be worth
risking slipping the release a bit for.
I think we switched the default for the non-stubdom case already (or
were planning too!). I think this is sufficient for 4.3.

I've been thinking about this -- wouldn't this mean that if you do the "default" thing and just install a Windows guest in an HVM domain (not thinking about qemu or whatever), that now I"m stuck and I *can't* use stubdoms (because Windows doesn't like the hardware changing that much under its feet)? That doesn't sound like a very good user experience to me.


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