Xen 4.2 TODO / Release Plan

[Ian Campbell <Ian.Campbell@citrix.com>]

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
30 July         -- First release candidate
Weekly          -- RCN+1 until release          << WE ARE HERE

Keir released 4.2.0 rc3 on Thursday. Please test.

The updated TODO list follows.

hypervisor, blockers:

    * None

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:

        * None known

    * xl compatibility with xm:

        * No known issues

    * [CHECK] More formally deprecate xm/xend. Manpage patches already
      in tree. Needs release noting and communication around -rc1 to
      remind people to test xl.

    * [CHECK] Confirm that migration from Xen 4.1 -> 4.2 works.

    * Bump library SONAMES as necessary.
      <20502.39440.969619.824976@mariner.uk.xensource.com>

    * [BUG] qemu-traditional has 50% cpu utilization on an idle
      Windows system if USB is enabled. Not 100% clear whether this is
      Xen or qemu.  George Dunlap is performing initial
      investigations.

    * Disable generation id from xl. Microsoft changed the
      specification of this value between W8 beta and RC and we now
      implement the old spec. Disable for 4.2 and revist implementing
      hte new spec for 4.3. (Paul Durrant)

hypervisor, nice to have:

    * [BUG(?)] Under certain conditions, the p2m_pod_sweep code will
      stop halfway through searching, causing a guest to crash even if
      there was zeroed memory available.  This is NOT a regression
      from 4.1, and is a very rare case, so probably shouldn't be a
      blocker.  (In fact, I'd be open to the idea that it should wait
      until after the release to get more testing.)
      	    (George Dunlap)

    * S3 regression(s?) reported by Ben Guthro (Ben & Jan Beulich)

    * fix high change rate to CMOS RTC periodic interrupt causing
      guest wall clock time to lag (possible fix outlined, needs to be
      put in patch form and thoroughly reviewed/tested for unwanted
      side effects, Jan Beulich)

tools, nice to have:

    * xl compatibility with xm:

        * the parameter io and irq in domU config files are not
          evaluated by xl.  So it is not possible to passthrough a
          parallel port for my printer to domU when I start the domU
          with xl command. (reported by Dieter Bloms,
          <20120814100704.GA19704@bloms.de>)

    * 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
      (Done)

    * [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. Ping sent)

    * [BUG] xl allows same PCI device to be assigned to multiple
      guests. http://bugzilla.xen.org/bugzilla/show_bug.cgi?id=1826
      (<E4558C0C96688748837EB1B05BEED75A0FD5574A@SHSMSX102.ccr.corp.intel.com>)

    * address PoD problems with early host side accesses to guest
      address space (Jan Beulich, DONE)

    * fix ipxe build problems with gcc 4.7 (fedora 17).
      The following files fail to build:
        - ipxe/src/drivers/bus/isa.c
        - ipxe/src/drivers/net/myri10ge.c
        - ipxe/src/drivers/infiniband/qib7322.c
      Patches have been posted to ipxe-devel mailinglist, so we need
      to update our ipxe version or grab the patches. (DONE, Keir)

    * "xl list -l" does not produce proper json. Should be possible to
      make it into an array. Reported by Bastian Blank,
      <20120814121741.GA10214@wavehammer.waldi.eu.org>. (Ian Campbell, DONE)

    * "xl cpupool-create" segfault on incorrect input. Reported by
      George Dunlap,
      <CAFLBxZaEci0mOcDCgFX9zk=wh3z4Nf1LD5E5Fcy7Y3=ioDAM=g@mail.gmail.com>
      (Ian Campbell, patch posted)



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