Re: [Xen-devel] Xen 4.6 Development Update (three months reminder)

[Tamas Lengyel <tamas.lengyel@xxxxxxxxxxxx>]

On Tue, Apr 14, 2015 at 12:27 PM, <wei.liu2@xxxxxxxxxx> 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 Â- 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 ==

*Â Alternate p2m: support multiple copies of host p2m (ok)
 - Ed White

*Â Improve RTDS scheduler (none)
 - Dagaen Golomb, Meng Xu

*Â Credit2: introduce per-vcpu hard and soft affinity (good)
 - Justin T. Weaver

*Â sndif: add API for para-virtual sound (fair)
 Âv7 posted
 - Oleksandr Dmytryshyn

*Â gnttab: improve scalability (good)
 Âv5 posted
 - Christoph Egger

*Â Display IO topology when PXM data is available (good)
 Âv3 posted
 - Boris Ostrovsky

*Â Xen multiboot2-EFI support (fair)
 ÂSee http://lists.xen.org/archives/html/xen-devel/2013-05/msg02281.html
 ÂRFC posted
 - Daniel Kiper

*Â Credit2 production ready (none)
 Âcpu pinning, numa affinity and cpu reservation
 - George Dunlap

*Â VM event patches (none)
 ÂAdd support for XSETBV vm_events,
 ÂSupport hybernating guests
 ÂSupport for VMCALL-based vm_events
 - Razvan Cojocaru

=== Hypervisor X86 ===

*Â Intel Cache Allocation Technology (good)
 - Chao Peng

*Â VT-d Posted-interrupt (PI) (none)
 - Wu, Feng

*Â HT enabled with credit has 7.9 per perf drop. (none)
 Âkernbench demonstrated it
 Âhttp://www.gossamer-threads.com/lists/xen/devel/339409
 ÂThis has existed since credit1 introduction.
 - Dario Faggioli

*Â Support controlling the max C-state sub-state (fair)
 Âv3 posted
 ÂHadn't see the patch reposted.
 - Ross Lagerwall

*Â IOMMU ABI for guests to map their DMA regions (fair)
 - Malcolm Crossley

*Â Intel PML (Page Modification Logging) for Xen (none)
 Âdesign doc posted
 - Kai Huang

*Â RMRR fix (fair)
 ÂRFC posted
 - Tiejun Chen

*Â VPMU - 'perf' support in Xen (good)
 Âv14 posted
 ÂNeed reviews/final ack.
 - Boris Ostrovsky

*Â PVH - AMD hardware support. (fair)
 ÂRFC posted
 - Elena Ufimtseva

*Â PVH dom0 (fair)
 ÂRFC posted
 - Elena Ufimtseva

=== Hypervisor ARM ===

*Â Mem_access for ARM (good)
 Âv13 posted
 - Tamas K Lengyel

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

Â

*Â ITS support (fair )
 - Vijaya Kumar K

*Â Add ACPI support for arm64 on Xen (fair)
 ÂRFC posted
 - Parth Dixit

*Â ARM: reenable support 32-bit userspace running in 64-bit guest (good)
 Âv2 posted
 - Ian Campbell

*Â ARM remote processor iommu module (GPUs + IPUs) (fair)
 Âv3 posted
 - Andrii Tseglytskyi

*Â ARM VM save/restore/live migration (none)
 ÂNeed to rebased against migrationv2 - no code posted.
 - None

*Â ARM GICv2m support (none)
 - Suravee Suthikulanit

*Â ARM - passthrough of non-PCI (ok)
 - Julien Grall

*Â ARMÂ PCI passthrough (none)
 - Manish Jaggi
 - Vijay Kilari

== Xen toolstack ==

*Â toolstack-based approach to pvhvm guest kexec (fair)
 Âalso contains hypervisor side change
 - Vitaly Kuznetsov

*Â libxl: add qxl vga interface support for upstream qemu (fair)
 - Fabio Fantoni

*Â Toolstack-based approach to pvhvm guest kexec (ok)
 Âv4 posted
 - Vitaly Kuznetsov

*Â libxl: cancelling asynchronous operations (fair)
 ÂRFC posted
 - Ian Jackson

*Â VMware tools support (fair)
 - Don Slutz

*Â PV USB support in libxl (fair)
 - Chunyan Liu

*Â HVM USB support in libxl (fair)
 - George Dunlap

*Â Blktap2 support (fair)
 - George Dunlap

*Â pvscsi in libxl (fair)
 - Juergen Gross and Olaf

*Â COarse-grain LOck-stepping Virtual Machines in Xen (fair)
 ÂRFC v5 posted
 - Wen Congyang
 - Gui Jianfeng
 - Yang Hongyang
 - Dong, Eddie

*Â New Migration (v2). (good)
 Âv9 (libxc)
 Âgit://xenbits.xen.org/people/andrewcoop/xen.git
 ÂSeems that it might need to slip or we run v1 alongside v2.
 - Andrew Cooper & David Vrabel

*Â tmem migrationv2 patches. (none)
 - Bob Liu & Andrew Cooper & David Vrabel

*Â Remus using migration-v2 (fair)
 ÂRFC posted - depends on v6 of 'New Migration'
 - Yang Hongyang

*Â snapshot API extension (checkpointing disk) (fair)
 Âv10
 - Chunyan Liu

*Â PVH - Migration of PVH DomUs. (none)
 ÂDepends on migration2 code
 - Roger Pau MonnÃ

*Â PVH - Migration of guests from a PVH dom0Â (none)
 ÂDepends on migration2 code
 - Roger Pau MonnÃ

*Â Regression in PCI passthrough of INTx legacy devices can trigger list corruption (good)
 ÂSander reported it. Two different types of patches available.
 - Konrad Rzeszutek Wilk

== QEMU ==

*Â Linux-based QEMU upstream stub domain (fair)
 ÂRFC posted
 - Eric Shelton

*Â Using qemu-upstream in a stubdomain (none)
 ÂWill use rump kernels.
 - Wei Liu

*Â Intel IGD PCI GPU passthrough (ok)
 Âv5 posted
 - Chen, Tiejun

== Linux ==

*Â Linux ARM - Device assigment (PCI) (none)
 ÂDepends on Xen pieces which are on the Xen 4.6 list.
 - Manish Jaggi

*Â VPMU - 'perf' support in Linux (ok)
 ÂDepends on Xen patches
 ÂAcked by David Vrabel
 - Boris Ostrovsky

*Â vNUMA in Linux (ok)
 Âv6 posted
 - Wei Liu

*Â COLO Agent in Linux (fair)
 - Gui Jianfeng
 - Yang Hongyang
 - Dong, Eddie

*Â ARM64 - support 64K guest (none)
 - Julien Grall

== OpenStack ==

*Â setup CI loop for OpenStack (fair)
 - Anthony Perard

== FreeBSD ==

*Â PVH FreeBSD dom0 (ok)
 ÂFreeBSD 11 goal. Toolstack side done in Xen 4.5
 - Roger Pau MonnÃ

== Other OSes (MiniOS, QNX) ==

*Â ARM - MiniOS (fair)
 Âv7 posted
 - Thomas Leonard

*Â PV drivers for automotive kernels (fair)
 - Artem Mygaiev

*Â mini-os: xenbus changes for rump kernels (ok)
 Âgit://xenbits.xen.org/people/iwj/rumpuser-xen.git
 Âbranch: base.dev-xen-xenbus.v1..dev-xen-xenbus.v1
 Âv2 posted
 - Ian Jackson

== OSSTEST ==

*Â OSSTest: studom test case (none)
 - Wei Liu

*Â OSSTest: libvirt migration (fair)
 - Wei Liu

*Â OSSTest: upgrade to Debian Jessie (none)
 - Wei Liu

*Â OSSTest: performance test (fair)
 - Dario Faggioli

*Â CPU pool test case (fair)
 - Dario Faggioli

*Â Add a FreeBSD host (fair)
 - Roger Pau MonnÃ

*Â Nested virt test case

*Â v8 posted (fair)
 - Robert Hu

== Deferred ==

*Â ucode=scan also scan compressed initramfs (none)
 - Konrad Rzeszutek Wilk

*Â adjust log buffer based on memmap size (none)
 - Konrad Rzeszutek Wilk

*Â Further tmem cleanups/fixes (fair)
 - Bob Liu

*Â 1TB slow destruction (ok)
 - Bob Liu

*Â cpuid leveling (none)
 Âhttp://xenbits.xen.org/people/andrewcoop/feature-levelling/feature-levelling-D.pdf
 - Andrew Cooper

*Â IO-NUMA - hwloc and xl (none)
 ÂAndrew Cooper had an RFC patch for hwloc
 Âadd restrictions as to which devices cannot safely/functionally be split apart.
 - Boris Ostrovsky

*Â Convert tasklet to per-cpu tasklets (fair)
 ÂRFC posted
 - Konrad Rzeszutek Wilk

*Â Xen Boot Information (xbi) (ok)
 ÂDependency for GRUB2 + EFI work
 Âhttp://lists.xen.org/archives/html/xen-devel/2014-10/msg02068.html
 Âv4, No go for full patchset. Only some of the patches.
 ÂNo ARM EFI hardware (yet) available to test them.
 - Daniel Kiper

*Â Linux ARM - Device assigment usage in Linux code (arch/arm) non-PCI (none)
 ÂDepends on Xen pieces which are on the Xen 4.6 list.
 - Julien Grall

== Completed ==

*Â Clean-up of mem-event subsystem (good)
 Âv7 posted
 - Tamas K Lengyel

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

Â

*Â HVM guest NUMA (SRAT) (good)
 ÂSee vNUMA in Xen toolstack
 - Wei Liu

*Â vNUMA in Xen toolstack (good)
 Âv8 posted
 - Wei Liu

*Â Intel memory bandwidth monitoring for VMs (fair)
 Âv9 posted
 - Chao Peng

*Â ARM - SMMU resync of Linux's one (ok)
 - Julien Grall

*Â Add support for Xilinx ZynqMP SoC (fair)
 - Edgar E. Iglesias

*Â Add support for Huawei hip04-d01 platform (ok)
 - Frediano Ziglio

*Â Thunder X platform support (ok)
 - Vijay Kilari

*Â Splitting off mini-os (done)
 - Wei Liu

*Â OVMF on ARM (done)
 Âv4 posted
 - Ard Biesheuvel

*Â Update Xen tree to use upstream OVMF (done)
 - Anthony PERARD

*Â Enable vTPM subsystem on TPM 2.0 (done)
 - Xu, Quan

*Â SPICE support improvement (done)
 - Fabio Fantoni

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