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Re: [Xen-devel] Xen 4.5-rc1 update (RC1 is out 2014-Oct-24th)



On Sat, Oct 25, 2014 at 10:10:29AM +0200, Fabio Fantoni wrote:
> Il 24/10/2014 20:08, konrad.wilk@xxxxxxxxxx ha scritto:
> >Feature patchsets that did not make it in by today have been put
> >on the deferred list. If you think your feature should make it in Xen 4.5-rc2
> >please make your case.
> >
> >Xen 4.5-rc1 is out today. There are some issues (see 'Known Issues' below)
> >which are to be fixed in RC2. The official test-day is on Wednesday (Oct 
> >29th)
> >but if you want to start testing it today - please do!
> >
> >Details for the test-day are at
> >
> >http://wiki.xen.org/wiki/Xen_4.5_RC1_test_instructions
> >
> >In terms of bugs, we have:
> >
> >#6 linux: pv drivers miss shutdown command if issued too early
> >#8 "linux, xenbus mutex hangs when rebooting dom0 and guests hung."
> >#11 qxl hypervisor support
> 
> About qxl latest version of libxl/xl support patch is here (also posted to
> xen-devel) and should be ok:
> https://github.com/Fantu/Xen/commit/9d9d0ae23ab3e3e1fcfbb6f3201d3a79f958a7a3

which is aab4d1b266ce9891a684704f6abf6a5f6b3f7c24 upstrem.

> With xen 4.5 qxl vga in windows 7 64 bit domUs seems that works good as kvm
> except for a strange problem with xl save/restore.

Could you paste in your guest config please.

> After restore connecting with spice client domU "freeze" for 2-3 minutes, no
> errors or warnings visible in logs, I tried many times to take more
> informations about the problem and I already posted about it but for now
> nothing :(
> The only probably useful data are that domU's qemu process when the problem
> happen seems still working but domU's timing (from xl list) not increase.
> After restore seems do also other strange thing, "freeze" for 2-3 minutes
> also on windows poweroff.

That sounds like a timing issue. As in something is waiting for something
and we are not triggering it.

> Another qxl problem is with linux domUs, I tried to find useful data to
> solves it for years, I also did many posts about it in xen-devel- qemu-devel
> and spice-devel.
> On latest tests domU crash (not qemu crash, I already tried qemu backtrace
> but seems impossible) on domU's xorg start (with qxl driver installed) and
> I'm unable to take useful informations in logs and various debugs tried.

OK, so Linux is not working at all then?

Actually, let me try it out on my side.
> 
> Any help to solves or at least take more data about it is really much
> appreciated.
> 
> Thanks for any reply and sorry for my bad english.
> 
> >#13 Re: [Xen-devel] man page example: xm block-attach
> >#18 xl improve support for migration over non-sshlike tunnels
> >#19 xl migrate transport improvements
> >#22 xl does not support specifying virtual function for passthrough device
> >#23 Remove arbitrary LIBXL_MAXMEM_CONSTANT from libxl, see what breaks
> >#24 xl missing support for encrypted VNC
> >#27 Re: [Xen-devel] xend vs xl with pci=['<bdf'] wherein the '<bdf>' are not 
> >owned by pciback or pcistub will still launch.
> >#28 support PCI hole resize in qemu-xen
> >#30 libxl should implement non-suspend-cancel based resume path
> >#36 credit2 only uses one runqueue instead of one runq per socket
> >#38 Implement VT-d large pages so we can avoid sharing between EPT
> >#40 linux pvops: fpu corruption due to incorrect assumptions
> >#42 "linux, S3 resume of PVHVM fails - missing call to 
> >xen_arch_post_suspend?"
> >#43 "30s delay loading xenfb driver on some systems"
> >#44 Security policy ambiguities - XSA-108 process post-mortem
> >
> >And we should start closing them if they are fixed.
> >
> >
> >= Timeline =
> >
> >We are planning on a 9-month release cycle.  Based on that, below are
> >our estimated dates:
> >
> >
> >* Feature Freeze: 24th September 2014
> >* First RC: 24th October [Friday!] <==== <WE ARE HERE>
> >* RC2: Unknown. Need to talk to maintainers on scheduling.
> >* RC2: Unknown. Need to talk to maintainers on scheduling.
> >* Release: 10th December 2014
> >
> >The RCs and release will of course depend on stability and bugs, and
> >will therefore be fairly unpredictable.  The feature freeze may be
> >slipped for especially important features which are near completion.
> >
> >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
> >
> >= Feature freeze exception =
> >
> >Remember our goal for the release:
> >   1. A bug-free release
> >   2. An awesome release
> >   3. An on-time release
> >
> >Accepting a new feature may make Xen more awesome; but it also
> >introduces a risk that it will introduce more bugs.  That bug may be
> >found before the release (threatening #3), or it may not be found
> >until after the release (threatening #1).  Each freeze exception
> >request will attempt to balance the benefits (how awesome the
> >exception is) vs the risks (will it cause the release to slip, or
> >worse, cause a bug which goes un-noticed into the final release).
> >
> >The idea is that today we will be pretty permissive, but that we will
> >become progressively more conservative until the first RC, which is
> >scheduled for 3 weeks' time (October 25).  After that, we will only
> >accept bug fixes.
> >
> >Bug fixes can be checked in without a freeze exception throughout the
> >code 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.
> >
> >Features which are currently marked "experimental" or do not at the
> >moment work at all cannot be broken really; so changes to code only
> >used by those features should be able to get a freeze exception
> >easily.
> >
> >Features which change or add new interfaces which will need to be
> >supported in a backwards-compatible way (for instance, vNUMA) will
> >need freeze exceptions to make sure that the interface itself has
> >enough time to be considered stable.
> >
> >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 achieve goals 1-3 above better than not
> >doing so, feel free to make your case.
> >
> >= Open =
> >
> >== Known issues ==
> >
> >*  Systemd integration
> >    Affects CentOS7, SLES12, Fedora Core 21 and Debian Jessie. Xen source 
> > contains systemd files that can be used to configure the various run-time 
> > services. In the past the distributions would carry their own version of it 
> > - but now we host them. This is not yet complete - 
> > [[http://lists.xenproject.org/archives/html/xen-devel/2014-10/msg03064.html 
> > patches]] for this are being worked on for RC2.
> >   -  Wei and Olaf
> >
> >*  Stubdomains build issues
> >    stubdomains will not build. Fix is in staging (and will make RC2) or 
> > [[http://lists.xen.org/archives/html/xen-devel/2014-10/msg02925.html 
> > stubdom/Makefile should use QEMU_TRADITIONAL_LOC]]
> >   -  Michael Young
> >
> >*  Building against libxl (outside code)
> >    If you are building against libxl for any APIs before Xen 4.5 you will 
> > encounter building errors.
> >   -  Andrew Cooper
> >
> >*  Migrating large Windows guests can cause WMI service to hang
> >    Patch is in 'staging' and will be in RC2.
> >
> >*  pygrub parsing grub1 problems ==
> >    pygrub (Python code) has problems parsing grub.cfg file and hence cannot 
> > boot PV guests.
> >
> >*  xc_reserved_device_memory_map in hvmloader to avoid conflicting MMIO/RAM 
> >(good)
> >    v6
> >    Treating pieces as bug-fixes only.
> >   -  Tiejun Chen
> >
> >== Linux ==
> >
> >*  Linux block multiqueue (ok)
> >    v3 posted.
> >   -  Arianna Avanzini
> >
> >*  VPMU - 'perf' support in Linux (ok)
> >    Depends on Xen patches
> >    Acked by David Vrabel
> >   -  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
> >
> >*  Fix PAT in Linux kernel (aka Full support for PAT) (good)
> >    Acked and reposted for v3.18. Waiting for x86 maintainers.
> >   -  Juergen Gross
> >
> >== FreeBSD ==
> >
> >*  PVH FreeBSD dom0 (ok)
> >    FreeBSD 11 goal. Toolstack side done in Xen 4.5
> >   -  Roger Pau Monné
> >
> >== 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
> >
> >*  AMD Radeon PCI GPU passthrough (none)
> >    Focusing on Xen 4.2 and qemu-traditional
> >   -  Kelly Zytaruk
> >
> >*  Intel IGD PCI GPU passthrough (ok)
> >    v5 posted
> >   -  Chen, Tiejun
> >
> >*  Xen PV block driver in OVMF (UEFI in guest) (ok)
> >    v1
> >   -  Anthony PERARD
> >
> >== Deferred to Xen hypervisor 4.6 ==
> >
> >*  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
> >
> >*  PVH - AMD hardware support. (fair)
> >    Posted.
> >   -  Mukesh Rathor
> >
> >*  VMware backdoor (hypercall) (ok)
> >    v5 posted.
> >   -  Don Slutz
> >
> >*  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
> >
> >*  dirty vram / IOMMU bug (fair)
> >    http://bugs.xenproject.org/xen/bug/38
> >   -  Zhang, Yang Z
> >
> >*  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
> >
> >*  Support controlling the max C-state sub-state (ok)
> >    v3 posted
> >   -  Ross Lagerwall
> >
> >*  IOMMU ABI for guests to map their DMA regions (fair)
> >   -  Malcolm Crossley
> >
> >*  Default to credit2 (none)
> >    cpu pinning, numa affinity and cpu reservation
> >   -  George Dunlap
> >
> >*  Convert tasklet to per-cpu tasklets (fair)
> >    RFC posted
> >   -  Konrad Rzeszutek Wilk
> >
> >*  Further tmem cleanups/fixes (16TB etc) (fair)
> >   -  Bob Liu
> >
> >*  1TB slow destruction (ok)
> >   -  Bob Liu
> >
> >*  ARM VM save/restore/live migration (none)
> >    Need to rebased against migrationv2 - no code posted.
> >   -  Junghyun Yoo
> >
> >*  ARM GICv2m support (none)
> >   -  Linaro (unknown)
> >
> >== Deferred to Xen toolstack 4.6 ==
> >
> >*  vNUMA in Xen toolstack (ok)
> >    v11 posted
> >    Hypervisor part in
> >    git://gitorious.org/vnuma/xen_vnuma.git:v11
> >   -  Elena Ufimtseva
> >
> >*  pvscsi in libxl (fair)
> >   -  Juergen Gross and Olaf
> >
> >*  COarse-grain LOck-stepping Virtual Machines in Xen (fair)
> >    RFC v3 posted, based on remus-v19
> >   -  Wen Congyang
> >   -  Gui Jianfeng
> >   -  Yang Hongyang
> >   -  Dong, Eddie
> >
> >*  extend the xenstore ring with a 'closing' signal (fair)
> >    RFC patch posted
> >   -  David Scott
> >
> >*  New Migration (v2). (good)
> >    v7 (libxc and libxl)
> >    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
> >
> >*  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
> >
> >*  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
> >
> >*  xl list --long (and some related xl commands) have some bugs (none)
> >   -  Zhigang Wang
> >
> >*  Xen HPET interrupt fixes (fair)
> >    behind migration v2
> >   -  Andrew Cooper
> >
> >*  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
> >
> >*  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 Monné
> >
> >*  PVH - Migration of guests from a PVH dom0  (none)
> >    Depends on migration2 code
> >   -  Roger Pau Monné
> >
> >*  "Short" grant copy (just header) of packets. (none)
> >   -  Zoltan Kiss
> >
> >== Deferred to Linux's after Xen 4.6 ==
> >
> >*  ARM - Device assigment usage in Linux code (arch/arm) (none)
> >    Depends on Xen pieces which are on the Xen 4.6 list.
> >   -  Julien Grall
> >
> >*  Linux ARM - Device assigment (fair)
> >   -  Julien Grall
> >
> >== 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 ==
> >
> >== Hypervisor ==
> >
> >*  ARM - introduce GNTTABOP_cache_flush (ok)
> >    v11
> >   -  Stefano Stabellini
> >
> >*  ARM - VGIC emulation (done)
> >    Reposted as gic and vgic fixes and improvements
> >    v12
> >   -  Stefano Stabellini
> >
> >*  ARM implement mem_access (done)
> >    v12, two patches for Xen 4.6
> >    https://github.com/tklengyel/xen/tree arm_memaccess_12-for-4.5
> >   -  Tamas K Lengyel
> >
> >*  ARM - Add Odroid-XU (Exynos5410) support (done)
> >    v6
> >   -  Suriyan Ramasami
> >
> >*  ARM GICv3 support (done)
> >    v11 posted
> >   -  Vijay Kilari
> >
> >*  ARM implement mem_access (done)
> >    v12, two patches for Xen 4.6
> >    https://github.com/tklengyel/xen/tree arm_memaccess_12-for-4.5
> >   -  Tamas K Lengyel
> >
> >*  ARM - MiniOS (done)
> >    v7 posted
> >   -  Thomas Leonard
> >
> >*  ARM XEN_DOMCTL_memory_mapping hypercall for ARM (done)
> >    v12 posted.
> >   -  Arianna Avanzini
> >
> >*  ARM - XENFEAT_grant_map_11 (aka map grants refs at pfn = mfn) (done)
> >    Provide kernels an grant->MFN lookup
> >    v4
> >   -  Stefano Stabellini
> >
> >*  ARM PSCI v0.2 (done)
> >    v11 posted
> >   -  Parth Dixit
> >
> >*  ARM  - IOMMU support (done)
> >   -  Julien Grall
> >
> >*  ARM Interrupt latency reduction (no maintenance interrupts) (good)
> >   -  Stefano Stabellini
> >
> >*  ARM DRA7 support (done)
> >    v3 posted
> >    v3 with comments applied
> >   -  Andrii Tseglytskyi
> >
> >*  ARM: Use super pages in p2m (done)
> >    v5 posted
> >   -  Ian Campbell
> >
> >*  ARM Xen UEFI booting on ARM (done)
> >    v5
> >   -  Roy Franz
> >
> >*  VPMU - 'perf' support in Xen (good)
> >    v14 posted
> >    Need reviews/final ack.
> >   -  Boris Ostrovsky
> >
> >*  Cache QoS Monitoring - hypercalls (done)
> >    Just hypercalls - no toolstack changes.
> >    v15
> >    Hit a snag with rdmsr/IPI/wrmsr/IPI, possible redesign
> >   -  Chao Peng, Dongxiao Xu, and Shantong Kang
> >
> >*  XenRT (Preemptive Global Earliest Deadline First) (done)
> >    v3
> >   -  Meng Xu
> >
> >*  Introspection of HVM guests (done)
> >    v10, split out in for 4.5 (smaller subset)
> >   -  Razvan Cojocaru
> >
> >*  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
> >
> >*  Xen PVH dom0 (done)
> >   -  Mukesh Rathor
> >
> >*  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
> >
> >*  ioreq-server, aka secondary emulators (done)
> >   -  Paul Durrant
> >
> >*  Soft affinity for vcpus (was NUMA affinity for vcpus) (good)
> >    v11 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
> >
> >== lib{xc,xl} and toolstack ==
> >
> >*  Build systems fixes/improvements (ok)
> >   -  Andrew Cooper
> >
> >*  libxl work - JSON to keep track of guest configs (done)
> >    Some patches merged, need to post more.
> >   -  Wei Liu
> >
> >*  Remus in Xen (libxl) (done)
> >    v19
> >    url:  https://github.com/macrosheep/xen/tree/remus-v19
> >   -  Gui Jianfeng
> >   -  Yang Hongyang
> >   -  Dong, Eddie
> >
> >*  libvirt and xl discard support, so that libvirt can start using it (done)
> >   -  Olaf Hering
> >
> >*  OSSTest: upstream QEMU (done)
> >   -  Ian Campbell
> >
> >*  rework VM Generation ID (done)
> >    v7 posted
> >   -  David Vrabel
> >
> >*  systemd support (done)
> >    v11
> >   -  Luis R. Rodriguez
> >
> >*  Soft affinity for vcpus libxl/xl changes (done)
> >    v13 posted
> >   -  Dario Faggioli
> >
> >== QEMU ==
> >
> >*  Bigger PCI hole in QEMU (done)
> >    Needs to be rebased
> >   -  Don Slutz
> >
> >*  QEMU 2.0 branch for qemu-upstream (done)
> >    It is v2.0 with 2.1 Xen backports.
> >   -  Stefano Stabellini
> >
> >== Linux 3.18 and earlier ==
> >
> >*  pvSCSI in Linux (fronted and backend) (done)
> >    v6
> >   -  Juergen Gross
> >
> >*  Linux PVH dom0 (done)
> >   -  Mukesh Rathor
> >
> >*  Netback multiqueue (good)
> >   -  Wei Liu
> >
> >*  Linux pvops of Xen EFI hypercall support (done)
> >   -  Daniel Kiper
> >
> >
> >
> >
> >_______________________________________________
> >Xen-devel mailing list
> >Xen-devel@xxxxxxxxxxxxx
> >http://lists.xen.org/xen-devel
> 

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