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Re: [Qemu-devel] [libvirt] [PULL 25/26] block: Remove deprecated -drive


From: Daniel P . Berrangé
Subject: Re: [Qemu-devel] [libvirt] [PULL 25/26] block: Remove deprecated -drive option serial
Date: Mon, 9 Jul 2018 12:17:01 +0100
User-agent: Mutt/1.10.0 (2018-05-17)

On Mon, Jul 09, 2018 at 01:08:38PM +0200, Cornelia Huck wrote:
> On Mon, 09 Jul 2018 08:33:05 +0200
> Markus Armbruster <address@hidden> wrote:
> 
> > Peter Maydell <address@hidden> writes:
> > 
> > > On 6 July 2018 at 15:56, Kevin Wolf <address@hidden> wrote:  
> > >> Am 06.07.2018 um 13:11 hat Cornelia Huck geschrieben:  
> > >>> That way, we can still easily remove old cruft (case (a)), but still
> > >>> accommodate cases like this (case (c)). The obvious drawback is that
> > >>> we'd need someone to curate the deprecation watchlist, to poke the
> > >>> users we're waiting for, and probably remove anyway after some time if
> > >>> they don't get their act together.  
> > >>
> > >> The problem is that things are only starting to move after two releases
> > >> have passed.  
> > >
> > > Right, so clearly just "put a note in the documentation" isn't
> > > sufficient advertisement/prodding of things going away.  
> > 
> > Yes.  Ideas on more forceful notification have been tossed around, we
> > just have to act on them.
> > 
> > >                                                         (Also, two
> > > releases is pretty fast. Many of our users will be using distro
> > > packaged versions of QEMU which will lag further behind than
> > > bleeding-edge users. The system version of QEMU on my desktop
> > > machine is 2.5...)  
> > 
> > If you consume QEMU in a way that's impacted by the changes the
> > deprecation policy guards, you have two sane options:
> > 
> > * Track upstream deprecation, either continuously, or at least right
> >   after a QEMU release.  Since 2.10, they're collected in qemu-doc
> >   appendix "Deprecated features".
> 
> Can we draw more attention to this in any way? Point it out prominently
> in the release notes? Send a list to known consumers (e.g. libvirt) on
> release time?

Yes, we should all newly deprecated stuff in the release notes.

For libvirt, I think whenever something is proposed for deprecation
we could just CC libvir-list, or ask one of the libvirt people to
confirm its not being used. If it is, then we should file BZ against
libvirt.


Regards,
Daniel
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