Re: [Xen-devel] Xen 4.3 development update

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

On Fri, May 10, 2013 at 11:26 AM, George Dunlap
<George.Dunlap@xxxxxxxxxxxxx> wrote:
> This information will be mirrored on the Xen 4.3 Roadmap wiki page:
>  http://wiki.xen.org/wiki/Xen_Roadmap/4.3
>
> Please start reporting bugs.  Additionally, there are a number of bugs
> listed which do not have owners -- please take a look to see if there
> are any you can work on, and let me know that you are planning on
> doing so.
>
> The key goals we're focusing on now, in order, are as follows:
>  1. Have a bug-free 4.3 release
>  2. Have an awesome 4.3 release
>  3. Have a 4.3 release that happens on schedule (ready by June 15th)
>
> The most important thing in making a case is to answer the question,
> "If there are bugs in this patch, will they be discovered before the
> June 15h release?"  The second most important thing is to consider the
> cost/benefit analysis of bugs that are found: what is the risk of
> introducing a bug which will delay the release, vs the benefit it will
> have in making the release better?
>
> Please begin to test and report bugs against the release.
>
> = 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
> * First RC: 6 May 2013 <== WE ARE HERE
> * Release: 17 June 2013
>
> The RCs and release will of course depend on stability and bugs, and
> will therefore be fairly unpredictable.  Each new feature will be
> considered on a case-by-case basis.
>
> Last updated: 10 May 2013
>
> == Completed ==
>
> * Default to QEMU upstream (partial)
>  - pci pass-thru (external)
>  - enable dirtybit tracking during migration (external)
>  - xl cd-{insert,eject} (external)
>
> * openvswitch toostack integration
>   To label "tech-preview" unless we get good testing (>10 individuals)
>
> * NUMA scheduler affinity
>
> * Install into /usr/local by default
>   owner: Ian Campbell
>
> * Persistent grants for blk (external)
>  - Linux
>  - qemu
>
> * Allow XSM to override IS_PRIV checks in the hypervisor
>
> * vTPM updates
>
> * Scalability: 16TiB of RAM
>
> * CPUID-based idle (don't rely on ACPI info f/ dom0)
>
> * Serial console improvements
>   -EHCI debug port
>
> == Bugs fixed since last update ==
>
> * xl, compat mode, and older kernels
>
> * cannot free const libxl_event
>
> * qemu-upstream: cd-insert and cd-eject not working
>
> * Guests which use VCPUOP_register_vcpu_info fail to shut down cleanly
>
> == Bugs ==
>
> * Windows 2003 fails to install in Xen-unstable tip
>   > Narrowed down to c/s 2fe82ac11fd078485388fe7c5e8bc3b6ac9185b0
>   owner: Jan Beulich
>   status: Patches posted

Jan wants to move forward, while Tim would prefer to revert all the
RTC patches and wait until next cycle to take a look.  Unfortunately
it's not actually that easy to tell which is the least risky patch.

On the other hand, during the RC period we have the best chance of
testing all the off-beat operating systems that we're worried about.

In any case, Jan is the maintainer for the RTC code; unless Keir
weighs in, basically what he says will go; and we should try to get
something fixed as early as possible to make sure we can get things
tested.

Jan, what kinds of guest OSes does SuSE officially support running on
Xen?  Since you're keen on moving forward, it seems like it should
really be your responsibility to make sure that things are tested; if
you could arrange for SuSE to do testing of a variety of different
OSes, that would be ideal.

 -George

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