Re: Xen 4.2 TODO / Release Plan

[Andrew Cooper <andrew.cooper3@citrix.com>]

On 17/07/12 17:47, Ian Campbell wrote:
> I missed last week and yesterday because I was travelling, but here is
> an update...
>
> Plan for a 4.2 release:
> http://lists.xen.org/archives/html/xen-devel/2012-03/msg00793.html
>
> The time line is as follows:
>
> 19 March        -- TODO list locked down
> 2 April         -- Feature Freeze
>                                                 << WE ARE HERE
> When It's Ready -- First release candidate
> Weekly          -- RCN+1 until release
>
> The updated TODO list follows.
>
> If you are aware of any bugs which must/should be fixed for 4.2 then
> please reply to this thread (otherwise I may not remember to pick them
> up next week)
>
> Per the release plan a strong case will now have to be made as to why
> new items should be added to the list, especially as a blocker, rather
> than deferred to 4.3.
>
> hypervisor, blockers:
>
>     * [BUG] stub domains broken. HVM_PARAM_DM_DOMAIN needs to reset
>       HVM_PARAM_BUFIOREQ_EVTCHN (Anthony Perard, DONE)
>
> tools, blockers:
>
>     * libxl stable API -- we would like 4.2 to define a stable API
>       which downstream's can start to rely on not changing. Aspects of
>       this are:
>
>         * Interfaces which may need to be async:
>
>             * libxl_device_{disk,nic,vkb,add,pci}_add (and
>               remove). (Roger Pau Monné, all except pci included in
>               calling hotplug scripts from xl)
>
>         * LIBXL_NIC_TYPE enum names are confusing. (Roger, included in
>           calling hotplug scripts series)
>
>     * xl compatibility with xm:
>
>         * [BUG] cannot create an empty CD-ROM drive on HVM guest,
>           reported by Fabio Fantoni in <4F9672DD.2080902@tiscali.it>
>
>         * does not automatically try to select a (set of) node(s) on
>           which to create a VM and pin its vcpus there. (Dario
>           Faggioli, first half applied, second half reposted)
>
>     * [CHECK] More formally deprecate xm/xend. Manpage patches already
>       in tree. Needs release noting and communication around -rc1 to
>       remind people to test xl.
>
>     * calling hotplug scripts from xl (Linux and NetBSD) (Roger Pau
>       Monné, v9 posted)
>
>     * Block script support -- follows on from hotplug script (Roger
>       Pau Monné, "just be a matter of removing an "if"")
>
>     * [CHECK] Confirm that migration from Xen 4.1 -> 4.2 works.
>
>     * [BUG] LIBLEAFDIR et al and libfsimage do the wrong thing on
>       modern Debian/Ubuntu w/ multiarch capabilities (Matt Wilson,
>       DONE)
>
>     * libxl to reject attempts to migrate a domain using upstream
>       qemu, due to lack of log dirty support (Ian C, patch sent,
>       awaiting review)
>
> hypervisor, nice to have:
>
>     * vMCE save/restore changes, to simplify migration 4.2->4.3 with
>      new vMCE in 4.3. (Jinsong Liu, Jan Beulich)

* Complete docs for hypervisor command line options.
I am currently working on this while other things are compiling.

~Andrew

>
> tools, nice to have:
>
>     * xl compatibility with xm:
>
>         * Accept "xl cr /dev/null param=value" to provide all config
>           on the command line (W. Michael Petullo, DONE)
>
>     * libxl stable API
>
>         * libxl_wait_for_free_memory/libxl_wait_for_memory_target.
>           Interface needs an overhaul, related to
>           locking/serialization over domain create. IanJ to add note
>           about this interface being substandard but otherwise defer
>           to 4.3.
>
>         * Interfaces which may need to be async:
>
>             * libxl_cdrom_insert. Should be easy once
>               disk_{add,remove} done. This is basically a helper
>               function and its functionality can be implemented in
>               terms of the libxl_disk_* interfaces. If this is not
>               done in time we should document as a substandard
>               interface which is subject to change post 4.2.
>
>     * xl.cfg(5) documentation patch for qemu-upstream
>       videoram/videomem support:
>       http://lists.xen.org/archives/html/xen-devel/2012-05/msg00250.html
>       qemu-upstream doesn't support specifying videomem size for the
>       HVM guest cirrus/stdvga.  (but this works with
>       qemu-xen-traditional). (Pasi Kärkkäinen)
>
>     * [BUG] long stop during the guest boot process with qcow image,
>       reported by Intel: http://bugzilla.xen.org/bugzilla/show_bug.cgi?id=1821
>
>     * [BUG] vcpu-set doesn't take effect on guest, reported by Intel:
>       http://bugzilla.xen.org/bugzilla/show_bug.cgi?id=1822
>
>     * Load blktap driver from xencommons initscript if available, thread at:
>       <db614e92faf743e20b3f.1337096977@kodo2>. To be fixed more
>       properly in 4.3. (Patch posted, discussion, plan to take simple
>       xencommons patch for 4.2 and revist for 4.3)
>
>
>
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-- 
Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer
T: +44 (0)1223 225 900, http://www.citrix.com




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