On Tue, 2011-01-04 at 12:45 +0100, Jan Kiszka wrote:
> Am 04.01.2011 12:43, Glauber Costa wrote:
> > 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.kis...@siemens.com>
> >>>>
> >>>> 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 ?
> 
> Maybe at the moment, but not for device state dumping or maybe (dunno)
> for Kemari's continuous sync'ing. I simply want to avoid this implicit
> dependency.

that's fine.




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