Re: Xen 4.6 Development Update (three months reminder)

[Tamas Lengyel <tamas.lengyel@zentific.com>]

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On Tue, Apr 14, 2015 at 12:27 PM, <wei.liu2@citrix.com> wrote:

> Hi all
>
> We are now three months into 4.6 development window. This is an email to
> keep
> track of all the patch series I gathered. It is by no means complete and /
> or
> acurate. Feel free to reply this email with new projects or correct my
> misunderstanding.
>
> = Timeline =
>
> We are planning on a 9-month release cycle, but we could also release a bit
> earlier if everything goes well (no blocker, no critical bug).
>
> * Development start: 6 Jan 2015
> <=== We are here ===>
> * Feature Freeze: 10 Jul 2015
> * RCs: TBD
> * Release Date: 9 Oct 2015 (could release earlier)
>
> The RCs and release will of course depend on stability and bugs, and
> will therefore be fairly unpredictable.
>
> Bug-fixes, if Acked-by by maintainer, can go anytime before the First
> RC. Later on we will need to figure out the risk of regression/reward
> to eliminate the possiblity of a bug introducing another bug.
>
> = Prognosis =
>
> The states are: none -> fair -> ok -> good -> done
>
> none - nothing yet
> fair - still working on it, patches are prototypes or RFC
> ok   - patches posted, acting on review
> good - some last minute pieces
> done - all done, might have bugs
>
> = Bug Fixes =
>
> Bug fixes can be checked in without a freeze exception throughout the
> freeze, unless the maintainer thinks they are particularly high
> risk.  In later RC's, we may even begin rejecting bug fixes if the
> broken functionality is small and the risk to other functionality is
> high.
>
> Document changes can go in anytime if the maintainer is OK with it.
>
> These are guidelines and principles to give you an idea where we're coming
> from; if you think there's a good reason why making an exception for you
> will
> help us make Xen better than not doing so, feel free to make your case.
>
> == Hypervisor ==
>
> *  Alternate p2m: support multiple copies of host p2m (ok)
>   -  Ed White
>
> *  Improve RTDS scheduler (none)
>   -  Dagaen Golomb, Meng Xu
>
> *  Credit2: introduce per-vcpu hard and soft affinity (good)
>   -  Justin T. Weaver
>
> *  sndif: add API for para-virtual sound (fair)
>    v7 posted
>   -  Oleksandr Dmytryshyn
>
> *  gnttab: improve scalability (good)
>    v5 posted
>   -  Christoph Egger
>
> *  Display IO topology when PXM data is available (good)
>    v3 posted
>   -  Boris Ostrovsky
>
> *  Xen multiboot2-EFI support (fair)
>    See http://lists.xen.org/archives/html/xen-devel/2013-05/msg02281.html
>    RFC posted
>   -  Daniel Kiper
>
> *  Credit2 production ready (none)
>    cpu pinning, numa affinity and cpu reservation
>   -  George Dunlap
>
> *  VM event patches (none)
>    Add support for XSETBV vm_events,
>    Support hybernating guests
>    Support for VMCALL-based vm_events
>   -  Razvan Cojocaru
>
> === Hypervisor X86 ===
>
> *  Intel Cache Allocation Technology (good)
>   -  Chao Peng
>
> *  VT-d Posted-interrupt (PI) (none)
>   -  Wu, Feng
>
> *  HT enabled with credit has 7.9 per perf drop. (none)
>    kernbench demonstrated it
>    http://www.gossamer-threads.com/lists/xen/devel/339409
>    This has existed since credit1 introduction.
>   -  Dario Faggioli
>
> *  Support controlling the max C-state sub-state (fair)
>    v3 posted
>    Hadn't see the patch reposted.
>   -  Ross Lagerwall
>
> *  IOMMU ABI for guests to map their DMA regions (fair)
>   -  Malcolm Crossley
>
> *  Intel PML (Page Modification Logging) for Xen (none)
>    design doc posted
>   -  Kai Huang
>
> *  RMRR fix (fair)
>    RFC posted
>   -  Tiejun Chen
>
> *  VPMU - 'perf' support in Xen (good)
>    v14 posted
>    Need reviews/final ack.
>   -  Boris Ostrovsky
>
> *  PVH - AMD hardware support. (fair)
>    RFC posted
>   -  Elena Ufimtseva
>
> *  PVH dom0 (fair)
>    RFC posted
>   -  Elena Ufimtseva
>
> === Hypervisor ARM ===
>
> *  Mem_access for ARM (good)
>    v13 posted
>   -  Tamas K Lengyel
>

v14 has been posted as well, v15 will be sent this week.


>
> *  ITS support (fair )
>   -  Vijaya Kumar K
>
> *  Add ACPI support for arm64 on Xen (fair)
>    RFC posted
>   -  Parth Dixit
>
> *  ARM: reenable support 32-bit userspace running in 64-bit guest (good)
>    v2 posted
>   -  Ian Campbell
>
> *  ARM remote processor iommu module (GPUs + IPUs) (fair)
>    v3 posted
>   -  Andrii Tseglytskyi
>
> *  ARM VM save/restore/live migration (none)
>    Need to rebased against migrationv2 - no code posted.
>   -  None
>
> *  ARM GICv2m support (none)
>   -  Suravee Suthikulanit
>
> *  ARM - passthrough of non-PCI (ok)
>   -  Julien Grall
>
> *  ARM  PCI passthrough (none)
>   -  Manish Jaggi
>   -  Vijay Kilari
>
> == Xen toolstack ==
>
> *  toolstack-based approach to pvhvm guest kexec (fair)
>    also contains hypervisor side change
>   -  Vitaly Kuznetsov
>
> *  libxl: add qxl vga interface support for upstream qemu (fair)
>   -  Fabio Fantoni
>
> *  Toolstack-based approach to pvhvm guest kexec (ok)
>    v4 posted
>   -  Vitaly Kuznetsov
>
> *  libxl: cancelling asynchronous operations (fair)
>    RFC posted
>   -  Ian Jackson
>
> *  VMware tools support (fair)
>   -  Don Slutz
>
> *  PV USB support in libxl (fair)
>   -  Chunyan Liu
>
> *  HVM USB support in libxl (fair)
>   -  George Dunlap
>
> *  Blktap2 support (fair)
>   -  George Dunlap
>
> *  pvscsi in libxl (fair)
>   -  Juergen Gross and Olaf
>
> *  COarse-grain LOck-stepping Virtual Machines in Xen (fair)
>    RFC v5 posted
>   -  Wen Congyang
>   -  Gui Jianfeng
>   -  Yang Hongyang
>   -  Dong, Eddie
>
> *  New Migration (v2). (good)
>    v9 (libxc)
>    git://xenbits.xen.org/people/andrewcoop/xen.git
>    Seems that it might need to slip or we run v1 alongside v2.
>   -  Andrew Cooper & David Vrabel
>
> *  tmem migrationv2 patches. (none)
>   -  Bob Liu & Andrew Cooper & David Vrabel
>
> *  Remus using migration-v2 (fair)
>    RFC posted - depends on v6 of 'New Migration'
>   -  Yang Hongyang
>
> *  snapshot API extension (checkpointing disk) (fair)
>    v10
>   -  Chunyan Liu
>
> *  PVH - Migration of PVH DomUs. (none)
>    Depends on migration2 code
>   -  Roger Pau Monné
>
> *  PVH - Migration of guests from a PVH dom0  (none)
>    Depends on migration2 code
>   -  Roger Pau Monné
>
> *  Regression in PCI passthrough of INTx legacy devices can trigger list
> corruption (good)
>    Sander reported it. Two different types of patches available.
>   -  Konrad Rzeszutek Wilk
>
> == QEMU ==
>
> *  Linux-based QEMU upstream stub domain (fair)
>    RFC posted
>   -  Eric Shelton
>
> *  Using qemu-upstream in a stubdomain (none)
>    Will use rump kernels.
>   -  Wei Liu
>
> *  Intel IGD PCI GPU passthrough (ok)
>    v5 posted
>   -  Chen, Tiejun
>
> == Linux ==
>
> *  Linux ARM - Device assigment (PCI) (none)
>    Depends on Xen pieces which are on the Xen 4.6 list.
>   -  Manish Jaggi
>
> *  VPMU - 'perf' support in Linux (ok)
>    Depends on Xen patches
>    Acked by David Vrabel
>   -  Boris Ostrovsky
>
> *  vNUMA in Linux (ok)
>    v6 posted
>   -  Wei Liu
>
> *  COLO Agent in Linux (fair)
>   -  Gui Jianfeng
>   -  Yang Hongyang
>   -  Dong, Eddie
>
> *  ARM64 - support 64K guest (none)
>   -  Julien Grall
>
> == OpenStack ==
>
> *  setup CI loop for OpenStack (fair)
>   -  Anthony Perard
>
> == FreeBSD ==
>
> *  PVH FreeBSD dom0 (ok)
>    FreeBSD 11 goal. Toolstack side done in Xen 4.5
>   -  Roger Pau Monné
>
> == Other OSes (MiniOS, QNX) ==
>
> *  ARM - MiniOS (fair)
>    v7 posted
>   -  Thomas Leonard
>
> *  PV drivers for automotive kernels (fair)
>   -  Artem Mygaiev
>
> *  mini-os: xenbus changes for rump kernels (ok)
>    git://xenbits.xen.org/people/iwj/rumpuser-xen.git
>    branch: base.dev-xen-xenbus.v1..dev-xen-xenbus.v1
>    v2 posted
>   -  Ian Jackson
>
> == OSSTEST ==
>
> *  OSSTest: studom test case (none)
>   -  Wei Liu
>
> *  OSSTest: libvirt migration (fair)
>   -  Wei Liu
>
> *  OSSTest: upgrade to Debian Jessie (none)
>   -  Wei Liu
>
> *  OSSTest: performance test (fair)
>   -  Dario Faggioli
>
> *  CPU pool test case (fair)
>   -  Dario Faggioli
>
> *  Add a FreeBSD host (fair)
>   -  Roger Pau Monné
>
> *  Nested virt test case
>
> *  v8 posted (fair)
>   -  Robert Hu
>
> == Deferred ==
>
> *  ucode=scan also scan compressed initramfs (none)
>   -  Konrad Rzeszutek Wilk
>
> *  adjust log buffer based on memmap size (none)
>   -  Konrad Rzeszutek Wilk
>
> *  Further tmem cleanups/fixes (fair)
>   -  Bob Liu
>
> *  1TB slow destruction (ok)
>   -  Bob Liu
>
> *  cpuid leveling (none)
>
> http://xenbits.xen.org/people/andrewcoop/feature-levelling/feature-levelling-D.pdf
>   -  Andrew Cooper
>
> *  IO-NUMA - hwloc and xl (none)
>    Andrew Cooper had an RFC patch for hwloc
>    add restrictions  as to which devices cannot safely/functionally be
> split apart.
>   -  Boris Ostrovsky
>
> *  Convert tasklet to per-cpu tasklets (fair)
>    RFC posted
>   -  Konrad Rzeszutek Wilk
>
> *  Xen Boot Information (xbi) (ok)
>    Dependency for GRUB2 + EFI work
>    http://lists.xen.org/archives/html/xen-devel/2014-10/msg02068.html
>    v4, No go for full patchset. Only some of the patches.
>    No ARM EFI hardware (yet) available to test them.
>   -  Daniel Kiper
>
> *  Linux ARM - Device assigment usage in Linux code (arch/arm) non-PCI
> (none)
>    Depends on Xen pieces which are on the Xen 4.6 list.
>   -  Julien Grall
>
> == Completed ==
>
> *  Clean-up of mem-event subsystem (good)
>    v7 posted
>   -  Tamas K Lengyel
>

About half of the series has been merged already, the remaining patches had
been posted as v9.


>
> *  HVM guest NUMA (SRAT) (good)
>    See vNUMA in Xen toolstack
>   -  Wei Liu
>
> *  vNUMA in Xen toolstack (good)
>    v8 posted
>   -  Wei Liu
>
> *  Intel memory bandwidth monitoring for VMs (fair)
>    v9 posted
>   -  Chao Peng
>
> *  ARM - SMMU resync of Linux's one (ok)
>   -  Julien Grall
>
> *  Add support for Xilinx ZynqMP SoC (fair)
>   -  Edgar E. Iglesias
>
> *  Add support for Huawei hip04-d01 platform (ok)
>   -  Frediano Ziglio
>
> *  Thunder X platform support (ok)
>   -  Vijay Kilari
>
> *  Splitting off mini-os (done)
>   -  Wei Liu
>
> *  OVMF on ARM (done)
>    v4 posted
>   -  Ard Biesheuvel
>
> *  Update Xen tree to use upstream OVMF (done)
>   -  Anthony PERARD
>
> *  Enable vTPM subsystem on TPM 2.0 (done)
>   -  Xu, Quan
>
> *  SPICE support improvement (done)
>   -  Fabio Fantoni
>
>

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