Re: [Xen-devel] Xen 4.5 development update (July update)

[Hongyang Yang <yanghy@xxxxxxxxxxxxxx>]

Hello konrad,

å 09/03/2014 04:45 AM, konrad.wilk@xxxxxxxxxx åé:
> Below is a summary of the projects / features being worked on for the 4.5
> time frame.  The tentative feature freeze is scheduled for September 10th,
> which is less a week away!
>
> Most of the Xen patches that impacted the hypervisor and had'fair'
> (except the HVM introspection one) I moved to the Xen 4.6 list.
>
> They might get Acked by maintainers in the next couple of days which would
> be fantastic - and if so I will update the list. But perhaps not. Also
> some are in 'good' or in 'ok' condition - but that does not mean they
> will automatically go in Xen 4.5.
>
> In terms of QEMU  - I only had three items and since the version of QEMU
> from upstream we are using is already established (and stable) I don't see us
> backporting any more patches from upstream. But perhaps Stefano has some
> other plans...
...snip...
> == lib{xc,xl} and toolstack ==
>
> *  libxl work - JSON to keep track of guest configs (ok)
>    -  Wei Liu
>
> *  pvscsi should be targeted for 4.5, a prototype exists (fair)
>    -  Olaf Hering
>
> *  Remus in Xen (libxl) (ok)
>     v19
>     url: https://github.com/laijs/xen remus-v19
Url is here now:
 https://github.com/macrosheep/xen/tree/remus-v19


>    -  Gui Jianfeng
>    -  Yang Hongyang
>    -  Dong, Eddie
>
> == Linux ==
>
> *  Linux block multiqueue (fair)
>    -  Arianna Avanzini
>
> *  Netback grant table manipulations (ok)
>    -  Zoltan Kiss
>
> *  VPMU - 'perf' support in Linux (ok)
>     Depends on Xen patches
>    -  Boris Ostrovsky
>
> *  vNUMA in Linux (ok)
>     v6 posted
>     git://gitorious.org/vnuma/linux_vnuma.git
>    -  Elena Ufimtseva
>
> *  vsyscall in Linux (fair)
>    -  Konrad Rzeszutek Wilk
>
> *  COLO Agent in Linux (fair)
>    -  Gui Jianfeng
>    -  Yang Hongyang
>    -  Dong, Eddie
>
> *  vAPIC in PVHVM guests (Linux side) (none)
>    -  Boris Ostrovsky
>
> == FreeBSD ==
>
> *  PVH FreeBSD dom0 (ok)
>     FreeBSD 11 goal. Toolstack side done in Xen 4.5
>    -  Roger Pau MonnÃ
>
> == Other OSes (MiniOS, QNX) ==
>
> *  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
>
> == GRUB2 ==
>
> *  GRUB2 multiboot2 (fair)
>    -  Daniel Kiper
>
> == OSSTEST ==
>
> *  OSSTest: libvirt (good)
>    -  Ian Campbell
>
> == Deferred to QEMU v2.next ==
>
> *  Using qemu-upstream in a stubdomain (fair)
>     Will use rump kernels.
>    -  Ian Jackson
>
> *  Intel IGD PCI GPU passthrough (ok)
>     v5 posted
>    -  Chen, Tiejun
>
> *  Xen PV block driver in OVMF (UEFI in guest) (fair)
>     RFC posted.
>    -  Anthony PERARD
>
> == Deferred to Xen hypervisor 4.6 ==
>
> *  extending mem_access support to PV domain (fair)
>     RFC v2
>    -  Aravindh Puthiyaparambil (aravindp)
>
> *  Repurpose SEDF Scheduler for Real-time (fair)
>     RFC patch posted (v2)
>    -  Joshua Whitehead, Robert VanVossen
>
> *  ARM remote processor iommu module (GPUs + IPUs) (fair)
>     v3 posted
>    -  Andrii Tseglytskyi
>
> *  COarse-grain LOck-stepping Virtual Machines in Xen (fair)
>     RFC patch posted
>    -  Wen Congyang
>    -  Gui Jianfeng
>    -  Yang Hongyang
>    -  Dong, Eddie
>
> *  extend the xenstore ring with a 'closing' signal (fair)
>     RFC patch posted
>    -  David Scott
>
> *  libxl migrationv2 patches. (none)
>    -  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
>
> *  Xen multiboot2-EFI support (fair)
>     Needed for GrUB2
>     Depends on Xen Boot info (rework multiboot and other structs)
>     See http://lists.xen.org/archives/html/xen-devel/2013-05/msg02281.html
>     RFC posted
>    -  Daniel Kiper
>
> *  dirty vram / IOMMU bug (fair)
>     http://bugs.xenproject.org/xen/bug/38
>    -  Zhang, Yang Z
>
> *  snapshot API extension (checkpointing disk) (ok)
>     v5
>     His email bounces.
>    -  Bamvor Jian Zhang
>
> *  Rearrange and cleanup installation destination directories (/var -> 
> var/lib/xen) (fair)
>    -  Daniel Kiper
>
> *  libxl/xl - xm compatibility mode for mem-max and mem-set; (ok)
>    -  Daniel Kiper
>
> *  Support controlling the max C-state sub-state (ok)
>     v3 posted
>    -  Ross Lagerwall
>
> *  1TB slow destruction (ok)
>    -  Bob Liu
>
> *  IOMMU ABI for guests to map their DMA regions (fair)
>    -  Malcolm Crossley
>
> *  xl list --long (and some related xl commands) have some bugs (none)
>    -  Zhigang Wang
>
> *  Xen HPET interrupt fixes (fair)
>     behind migration v2
>    -  Andrew Cooper
>
> *  Convert tasklet to per-cpu tasklets (fair)
>    -  Konrad Rzeszutek Wilk
>
> *  ARM VM save/restore/live migration (none)
>     Need to rebased against migrationv2 - no code posted.
>    -  Junghyun Yoo
>
> *  Default to credit2 (none)
>     cpu pinning, numa affinity and cpu reservation
>    -  George Dunlap
>
> *  "Short" grant copy (just header) of packets. (none)
>    -  Zoltan Kiss
>
> *  cpuid leveling (none)
>     
> http://xenbits.xen.org/people/andrewcoop/feature-levelling/feature-levelling-D.pdf
>    -  Andrew Cooper
>
> *  live migration knobs, there is no suitable code yet, just ideas (none)
>      http://lists.xenproject.org/archives/html/xen-devel/2014-03/msg00785.html
>    -  Olaf Hering
>
> *  Further tmem cleanups/fixes (16TB etc) (fair)
>    -  Bob Liu
>
> *  AMD Radeon PCI GPU passthrough (none)
>     Focusing on Xen 4.2 and qemu-traditional
>    -  Kelly Zytaruk
>
> *  xl does not handle migrate interruption gracefully (none)
>     If you start a localhost migrate, and press "Ctrl-C" in the middle, you get 
> two hung domains
>    -  Ian Jackson
>
> *  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
>
> *  HVM guest NUMA (none)
>    -  Matt Wilson
>
> *  PVH - Migration of PVH DomUs. (none)
>     Depends on migration2 code
>    -  Roger Pau MonnÃ
>
> *  PVH - Migration of guests from a PVH dom0  (none)
>     Depends on migration2 code
>    -  Roger Pau MonnÃ
>
> *  ARM GICv2m support (none)
>    -  Linaro (unknown)
>
> == Up for grabs ==
>
> *  OSSTest - also test Linux PVH guests
>
> *  PoD fixes
>     if you boot with memory <= maxmem we have a size estimation bug
>
> *  TLB flushing without locks in Xen
>
> *  xl does not support specifying virtual function for passthrough device
>     http://bugs.xenproject.org/xen/bug/22
>
> *  PCI hole resize support hvmloader/qemu-traditional/qemu-upstream with 
> PCI/GPU passthrough
>     http://bugs.xenproject.org/xen/bug/28
>
> *  libx{c,l} error handling cleanup
>
> *  Adding missing 'xend' features in libxl
>
> *  xl list -l on a dom0-only system
>
> *  xl list -l doesn't contain tty console port
>
> *  xl: passing more defaults in configuration in xl.conf
>     There are a number of options for which it might be useful to pass a default in 
> xl.conf.  For example, if we could have a default "backend" parameter for vifs, 
> then it would be easy to switch back and forth between a backend in a driver domain and a 
> backend in dom0.
>
> *  PVH - PVH working with shadow.
>     Based on Tim's work
>
> *  PVH - PCI passthrough for DomU.
>
> *  AMD performance regressions
>
> *  Performance due to hypercall preemption. More preemptions - slower. (none)
>
> == Completed ==
>
> *  pvSCSI in Linux (fronted and backend) (done)
>     v6
>    -  Juergen Gross
>
> *  alternative_asm in Xen (done)
>    -  Feng Wu
>
> *  SMAP (done)
>    -  Feng Wu
>
> *  Re-write of vHPET (done)
>     aka hvm/hpet: Detect comparator values in the past
>    -  Don Slutz
>
> *  vAPIC in PVHVM guests (Xen side) (done)
>    -  Boris Ostrovsky
>
> *  libvirt and xl discard support, so that libvirt can start using it (done)
>    -  Olaf Hering
>
> *  Xen PVH dom0 (done)
>    -  Mukesh Rathor
>
> *  Linux PVH dom0 (done)
>    -  Mukesh Rathor
>
> *  OSSTest: upstream QEMU (done)
>    -  Ian Campbell
>
> *  amd_ucode cleanups, verify patch size(enhancement) (mostly in master except 
> one patch)
>
> *  Data breakpoint Extension support (new-feat) (in master)
>
> *  Feature masking MSR support (enhancement) (in master)
>
> *  Support BRCM TruManage chip (Serial over LAN support) (new-feat) (in master)
>
> *  fix vmce_amd* functions, unify mce_amd mcheck initialization (fixes/cleanups)
>
> *  multiple AMD container files appended together in initrd (early initramfs)
>    -  Aravind and Suravee
>
> *  NUMA memory scrubbing (done)
>    -  Konrad Rzeszutek Wilk
>
> *  ARM  - IOMMU support (done)
>    -  Julien Grall
>
> *  ioreq-server, aka secondary emulators (done)
>    -  Paul Durrant
>
> *  Netback multiqueue (good)
>    -  Wei Liu
>
> *  ARM Interrupt latency reduction (no maintenance interrupts) (good)
>    -  Stefano Stabellini
>
> *  Bigger PCI hole in QEMU (done)
>     Needs to be rebased
>    -  Don Slutz
>
> *  ARM DRA7 support (done)
>     v3 posted
>     v3 with comments applied
>    -  Andrii Tseglytskyi
>
> *  rework VM Generation ID (done)
>     v7 posted
>    -  David Vrabel
>
> *  Soft affinity for vcpus (was NUMA affinity for vcpus) (good)
>     v11 posted
>    -  Dario Faggioli
>
> *  Linux pvops of Xen EFI hypercall support (done)
>    -  Daniel Kiper
>
> *  ARM: Use super pages in p2m (done)
>     v5 posted
>    -  Ian Campbell
>
> *  QEMU 2.0 branch for qemu-upstream (done)
>     It is v2.0 with 2.1 Xen backports.
>    -  Stefano Stabellini
>
> *  systemd support (done)
>     v11
>    -  Luis R. Rodriguez
>
> *  Soft affinity for vcpus libxl/xl changes (done)
>     v13 posted
>    -  Dario Faggioli
>
> *  HT enabled, virtualization overhead is high (Xen 4.4) (done)
>     kernbench demonstrated it
>     Looking and tracing
>     http://www.gossamer-threads.com/lists/xen/devel/339409
>     False alarm.
>    -  Dario Faggioli
>
> .
--
Thanks,
Yang.

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