[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] Xen 4.2 Release Plan / TODO

Ian Campbell wrote:
Plan for a 4.2 release:

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

Lots of DONE this week which is good, including one of the big three
remaining issues (libxl_domain_suspend asyncification) has gone in
now. Still to come are Roger's hotplug script changes (which acutally
cover multiple items on the list) and Dario's basic NUMA support, both
of which I think are almost there.

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, patch sent, reviewed,
       awaiting repost)

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_domain_suspend. Move xc_domain_save/restore into a
               separate process (Ian Jackson, DONE).

             * libxl_device_{disk,nic,vkb,add,pci}_add (and
               remove). (Roger Pau MonnÃ, disk&  nic included in
               calling hotplug scripts from xl, vkb
               trivial, not looked at pci yet)

         * LIBXL_NIC_TYPE enum names are confusing. (Roger, included in
           calling hotplug scripts series)

         * use libxl_cpumap for b_info.avail_cpus instead of an int,
           this allows setting more than 31 CPUS (Yang Z Zhang, DONE)

         * use an enum for VGA interface type (e.g. Cirrus,
           StdVGA). Allows for QXL support (in 4.3). (Zhou Peng, DONE)

     * xl compatibility with xm:

         * [BUG] cannot create an empty CD-ROM drive on HVM guest,
           reported by Fabio Fantoni in<4F9672DD.2080902@xxxxxxxxxx>

         * does not automatically try to select a (set of) node(s) on
           which to create a VM and pin its vcpus there. (Dario
           Faggioli, posted and reviewed, awaiting a repost)

     * [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
       MonnÃ, waiting on another iteration)

Posted v8.

     * Block script support -- follows on from hotplug script (Roger
       Pau MonnÃ, "just be a matter of removing an "if"")

     * Adjustments needed for qdisk backend to work on non-pvops Linux.
       "qemu/xendisk: set maximum number of grants to be used" (Jan
       Beulich, DONE for both qemu-xen-upstream and

     * [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,
       patch posted)

     * libxl to reject attempts to migrate a domain using upstream
       qemu, due to lack of log dirty support (Ian C, patch sent,
       reviewed, awaiting repost)

hypervisor, nice to have:

     * PoD performance improvements (George Dunlap, DONE)

     * vMCE save/restore changes, to simplify migration 4.2->4.3
      (Jinsong Liu)

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, patch posted)

     * 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:
       qemu-upstream doesn't support specifying videomem size for the
       HVM guest cirrus/stdvga.  (but this works with
       qemu-xen-traditional). (Pasi KÃrkkÃinen)

     * [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:

     * 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)

Xen-devel mailing list

Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.