Re: [PATCH v2 00/17] Drop support for QEMU < 0.12.0

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On Mon, Nov 09, 2015 at 06:37:06PM -0500, John Ferlan wrote:
> 
> 
> On 11/09/2015 11:24 AM, Daniel P. Berrange wrote:
> > A v2 of this series:
> > 
> >   https://www.redhat.com/archives/libvir-list/2015-November/msg00165.html
> > 
> > The patches for introducing virtlogd will be significantly
> > simplified if we don't need to worry about parsing stderr
> > during startup. This is required prior to QEMU 0.11 so
> > that we can get the dyanamically allocated /dev/pty/NNN
> > paths.
> > 
> > The QEMU 0.12.1 release was shipped in RHEL-6 vintage
> > distros and is already quite old, so seems like a fair
> > target version to aim for as the minimum required.
> > 
> > By dropping support for anything older than QEMU 0.12.0
> > we can remove the code for parsing stderr. The QEMU 0.12.0
> > release was quite special because it was the release where
> > QEMU switched what I call its "modern" approach to configuration
> > via -device. A major part of the complexity of the QEMU command
> > line generator is due to need to support non-device syntax,
> > so by mandating QEMU 0.12.0 we'll be able to kill off alot
> > of conditional code. This series makes a start by assuming
> > existance of 5 features, -vnc, 'info chardev', -no-reboot,
> > -drive and -name, but there are a tonne more we can assume.
> > 
> > This series drops 20 QEMU_CAPS_* flags, but there are still
> > another ~15-20 that can be dropped, now we assume 0.12.0
> > or better.
> > 
> > Changed in v2:
> > 
> >  - Fixed misc coverity reports from John
> >  - Rebased to use test .args files with new line wrapping for clarity
> >  - Split out some fixes into separate patches
> >  - Dropped a bunch more capabilities
> > 
> > Daniel P. Berrange (17):
> >   qemu: mandate QEMU version 0.12.0 or newer
> >   qemu: remove all support for kQEMU
> >   qemu: assume -vnc arg always takes a ':'
> >   qemu: assume 'info chardev' is always available
> >   qemu: assume -no-reboot is always available
> >   qemu: handle USB bus in qemuAssignDeviceDiskAliasFixed()
> >   qemu: handle floppy disk bus when parsing command line argv
> >   qemu: assume -drive argument is always available
> >   qemu: assume -name is always available
> >   qemu: assume -uuid is always available
> >   qemu: really remove last traces of Xenner support
> >   qemu: assume vnet-hdr feature is always available
> >   qemu: assume support for all migration protocols except rdma
> >   qemu: assume -drive cache always uses v2 option names
> >   qemu: assume -drive format is always available
> >   qemu: assume -vga is always available
> >   qemu: assume various QEMU 0.10 features are always available
> > 
> 
> Other than a few things - I think the series looks good. Hopefully we'll
> have very few backport fix issues to a certain platform to worry about
> ;-).
> 
> I think the one unanswered question/issue is whether we make this 1.3.0
> or not.  Whether any of the .spec files need adjustment is something I'm
> never quite sure about either...

I vote for 1.3.0, because we've been stuck on 1.2.x for far too long
now :-)


Regards,
Daniel
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