Re: [libvirt PATCH v3 5/5] qemu: enable asynchronous teardown on s390x hosts by default

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On Wed, 5 Jul 2023 13:26:32 +0100
Daniel P. Berrangé <berrange@xxxxxxxxxx> wrote:

[...]

> > > I rather think mgmt apps need to explicitly opt-in to async teardown,
> > > so they're aware that they need to take account of delayed RAM
> > > availablity in their accounting / guest placement logic.  
> > 
> > what would you think about enabling it by default only for guests that
> > are capable to run in Secure Execution mode?  
> 
> IIUC, that's basically /all/ guests if running on new enough hardware
> with prot_virt=1 enabled on the host OS, so will still present challenges
> to mgmt apps needing to be aware of this behaviour AFAICS.

I think there is some fencing still? I don't think it's automatic

> 
> 
> With regards,
> Daniel





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