Bug#1079800: Bug#1107288: qemu-system-ppc - kvm configured incorrectly for debian: Can't support 64 kiB guest pages with 4 kiB host pages
On 6/18/25 10:14 AM, Michael Tokarev wrote:
> On 18.06.2025 11:02, Philipp Kern wrote:
> []
>> It'd be great if qemu could autodetect this, i.e. presumably use
>> getconf(PAGE_SIZE) for this.
>
> As has been explained to me by the qemu ppc people, autodetecting this
> is wrong because this way qemu will start with different configuration
> on different hosts, and the virtual machines will be unpredictable
> non-migratable. I don't know how important this is, though - probably
> being able to start in the first place is more important.
Aren't they non-migratable anyway if the host kernel page size config
differs? I.e. if you are already diverging there between multiple hosts,
you lost the ability to migrate because it would not be runnable either
- not just unable to start. But I surely miss something here. :)
Kind regards
Philipp Kern
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