Re: [RFC] kvm: x86: export vCPU halted state to sysfs

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On Fri, Feb 02, 2018 at 03:19:45PM -0500, Luiz Capitulino wrote:
> On Fri, 2 Feb 2018 18:09:12 -0200
> Eduardo Habkost <ehabkost@xxxxxxxxxx> wrote:
[...]
> > Your plan above covers what will happen when using newer QEMU
> > versions, but libvirt still needs to work sanely if running QEMU
> > 2.11.  My suggestion is that libvirt do not run query-cpus to ask
> > for the "halted" field on any architecture except s390.
> 
> My current plan is to ask libvirt to completely remove query-cpus
> usage, independent of the arch and use the new command instead.

This would be a regression for people running QEMU 2.11 on s390.

(But maybe it would be an acceptable regression?  Viktor, what do
you think?  Are there production releases of management systems
that already rely on vcpu.<n>.halted?)

-- 
Eduardo



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