Re: dropping 32-bit host support

[Philippe Mathieu-Daudé]

On 16/3/23 11:22, Andrew Randrianasulu wrote:
> чт, 16 мар. 2023 г., 12:17 Andrew Randrianasulu <randrianasulu@gmail.com 
> <mailto:randrianasulu@gmail.com>>:
>     чт, 16 мар. 2023 г., 11:31 Thomas Huth <thuth@redhat.com
>     <mailto:thuth@redhat.com>>:
>         On 16/03/2023 08.36, Philippe Mathieu-Daudé wrote:
>          > On 16/3/23 08:17, Andrew Randrianasulu wrote:
>          >> чт, 16 мар. 2023 г., 10:05 Philippe Mathieu-Daudé
>         <philmd@linaro.org <mailto:philmd@linaro.org>
>          >> <mailto:philmd@linaro.org <mailto:philmd@linaro.org>>>:
>          >>     On 16/3/23 01:57, Andrew Randrianasulu wrote:
>          >>      > Looking at https://wiki.qemu.org/ChangeLog/8.0
>         <https://wiki.qemu.org/ChangeLog/8.0>
>          >>     <https://wiki.qemu.org/ChangeLog/8.0
>         <https://wiki.qemu.org/ChangeLog/8.0>>
>          >>      > <https://wiki.qemu.org/ChangeLog/8.0
>         <https://wiki.qemu.org/ChangeLog/8.0>
>          >>     <https://wiki.qemu.org/ChangeLog/8.0
>         <https://wiki.qemu.org/ChangeLog/8.0>>>
>          >>      >
>          >>      > ===
>          >>      > System emulation on 32-bit x86 and ARM hosts has been
>         deprecated.
>          >>     The
>          >>      > QEMU project no longer considers 32-bit x86 and ARM
>         support for
>          >>     system
>          >>      > emulation to be an effective use of its limited
>         resources, and thus
>          >>      > intends to discontinue.


> Still, pushing users into endless hw upgrade is no fun:
>
> https://hackaday.com/2023/02/28/repurposing-old-smartphones-when-reusing-makes-more-sense-than-recycling/
>  
> <https://hackaday.com/2023/02/28/repurposing-old-smartphones-when-reusing-makes-more-sense-than-recycling/>
>
> note e-waste and energy consumption
>
> This graph does not make me happy:
>
> https://ourworldindata.org/grapher/global-energy-substitution?time=earliest..2021 
> <https://ourworldindata.org/grapher/global-energy-substitution?time=earliest..2021>
>
> Note this paradox too
>
> https://en.m.wikipedia.org/wiki/Jevons_paradox 
> <https://en.m.wikipedia.org/wiki/Jevons_paradox>


>          >> [...] I also ran qemu-system-ppc on Huawei Matepad T8 (32
>         bit Android,
>          >> too) for emulating old mac os 9. Yes, I can wait 10 min per
>         guest boot.
>          >> Fedora 36 armhf boots even slower on emulation!
>
>         Yes, but for such scenarios, you can also use older versions of
>         QEMU, you
>         don't need the latest and greatest shiny QEMU version.

Thomas answer still applies: if you can use QEMU v8.0.0 to emulate
macOS 9 on your Huawei Matepad T8 with 32-bit Android, why worry
about trying to use future QEMU versions?