Re: [PATCH v3 15/21] kvm: x86: Introduce kvmclock device to save/restore its state

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On Tue, 2011-01-04 at 12:34 +0100, Jan Kiszka wrote:
> Am 04.01.2011 12:08, Glauber Costa wrote:
> > On Tue, 2011-01-04 at 09:32 +0100, Jan Kiszka wrote:
> >> From: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
> >>
> >> If kvmclock is used, which implies the kernel supports it, register a
> >> kvmclock device with the sysbus. Its main purpose is to save and restore
> >> the kernel state on migration, but this will also allow to visualize it
> >> one day.
> > 
> > I would prefer having no pre-save, and doing the ioctl in the state
> > change handler. But I won't nitpick about that, if the maintainers think
> > this is okay, all the rest of the patch looks fine as well.
> 
> I did this for a reason: to be able to obtain the current clock state
> even while the vm is running. It's cleaner IMHO.

but if we're on pre-save, we are certain that the vm is stopped at this
moment, no ?



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