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

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Mon, Oct 27, 2014 at 10:01:00AM +0000, Andrew Cooper wrote:
> On 27/10/14 08:39, Paul Durrant wrote:
> >> -----Original Message-----
> >> From: Andrew Cooper [mailto:amc96@xxxxxxxxxxxxxxxx] On Behalf Of
> >> Andrew Cooper
> >> Sent: 24 October 2014 20:17
> >> To: konrad.wilk@xxxxxxxxxx; Wei Liu; m.a.young@xxxxxxxxxxxx;
> >> tiejun.chen@xxxxxxxxx; avanzini.arianna@xxxxxxxxx;
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> >> julien.grall@xxxxxxxxxx; xen-devel@xxxxxxxxxxxxxxxxxxxx; Stefano 
> >> Stabellini;
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> >> Aravind.Gopalakrishnan@xxxxxxx; Suravee.Suthikulpanit@xxxxxxx; Paul
> >> Durrant; Dario Faggioli; mcgrof@xxxxxxxx
> >> Subject: Re: Xen 4.5-rc1 update (RC1 is out 2014-Oct-24th)
> >>
> >> On 24/10/2014 19:08, konrad.wilk@xxxxxxxxxx wrote:
> >>> 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
> >>> #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.
> >> What is this in reference to?  I can't see any patches relevant to
> >> windows in staging.
> >>
> > I assume this in reference to 
> > http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=f6a07643e1cc0045c2a8eabb0fb106e8655ce25d

It was.
> 
> Quite, but that is already in rc1, hence the query.

Error on my part. Sorry about the confusion.
> 
> ~Andrew

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