Re: [Qemu-devel] release retrospective, next release timing, numbering

[Daniel P . Berrangé]

On Fri, Apr 27, 2018 at 09:01:20PM +0200, Michal Suchánek wrote:
> On Fri, 27 Apr 2018 17:24:38 +0100
> Peter Maydell <address@hidden> wrote:
> 
> > On 27 April 2018 at 17:17, Thomas Huth <address@hidden> wrote:
> > > On 27.04.2018 17:51, Peter Maydell wrote:  
> > >> Hi; I usually let people forget about releases for a month or
> > >> so before bringing this topic up, but:
> > >>
> > >> (1) do we want to call the next release 2.13, or something else?
> > >> There's no particular reason to bump to 3.0 except some
> > >> combination of
> > >>  * if we keep going like this we'll get up to 2.42, which starts to
> > >>    get silly
> > >>  * Linus-style "avoid being too predictable"
> > >>  * triskaidekaphobia  
> > >
> > > and maybe:
> > >
> > >  * Celebrate 15 years of QEMU  
> > 
> > Oh, hey, I hadn't noticed that. That's as good a reason as
> > any other!
> > 
> > > By the way, just another crazy idea for v3.0 (i.e. feel free to
> > > turn it down immediately ;-)): Since compilation and testing time
> > > for QEMU is really huge, what do you think if we got rid of some
> > > QEMU binaries? qemu-system-aarch64 is a superset of
> > > qemu-system-arm, qemu-system-x86_64 is a superset of
> > > qemu-system-i386 and qemu-system-ppc64 is a superset of
> > > qemu-system-ppc (and qemu-system-ppcemb). Would be feasible to get
> > > rid of the subset binaries with some work? (I think they were
> > > especially useful on 32-bit machines in the past, but most people
> > > are using 64-bit machines nowadays, aren't they?).  
> > 
> > I think Markus' backward-compatibility rubber chicken may prevent
> > us from removing those executables...
> 
> At least the PPC vs PPC64 default to different BIOS, machine type, etc.
> 
> That could be achieved by a wrapper script around the 64bit binary I
> suppose.
> 
> Is there any reason why the 64bit emulator would not run on 32bit
> system? The emulated 64bit system is .. emulated after all.

I'm assuming thuat a qemu-system-x86_64  binary cannot use KVM to run
on a 32-bit host kernel, even if it was only running a 32-bit guest ?

Regards,
Daniel
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