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xen-devel
Re: [Xen-devel] [PATCH 6 of 6] PV on HVM suspend\resume
On Tue, Apr 27, 2010 at 06:08:35AM +0100, Stefano Stabellini wrote:
> On Mon, 26 Apr 2010, Jeremy Fitzhardinge wrote:
> > On 04/25/2010 04:25 PM, Stefano Stabellini wrote:
> > >> This won't compile with CONFIG_PREEMPT enabled, because out_destroy_sm
> > >> is missing below.
> > >>
> > >>
> > >
> > > Now it is fixed,
> >
> > Did you push out the fix (ideally as a new delta changeset on top of the
> > previous ones, rather than rebaseing them).
> >
>
> Yes but this time I rebased them; next time I'll keep the fix separated.
>
> >
> > > however I tried suspend/resume with CONFIG_PREEMPT
> > > enabled and the kernel seems to hang at resume time; I wonder if it
> > > works for pv guests since the suspend/resume code is similiar...
> > >
> >
> > I think Pasi and IanC tested it quite a bit not too long ago, but its
> > possible they didn't test preempt kernels (and it wouldn't surprise me
> > at all if preempt breaks things).
> >
>
> all right, more debugging required here...
>
I was testing a lot with normal PV guests.. kernel .config was based
on standard Fedora kernels:
$ grep -i empt config-2.6.32.11-99.fc12.x86_64
# CONFIG_TREE_PREEMPT_RCU is not set
CONFIG_PREEMPT_NOTIFIERS=y
# CONFIG_PREEMPT_NONE is not set
CONFIG_PREEMPT_VOLUNTARY=y
# CONFIG_PREEMPT is not set
$ grep -i empt config-2.6.32.9-70.fc12.i686.PAE
# CONFIG_TREE_PREEMPT_RCU is not set
CONFIG_PREEMPT_NOTIFIERS=y
# CONFIG_PREEMPT_NONE is not set
CONFIG_PREEMPT_VOLUNTARY=y
# CONFIG_PREEMPT is not set
-- Pasi
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