Re: [PATCH v2 01/11] xen/manage: keep track of the on-going suspend mode
From: Anchal Agarwal
Date: Thu Jul 30 2020 - 19:07:03 EST
On Mon, Jul 27, 2020 at 06:08:29PM -0400, Boris Ostrovsky wrote:
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> On 7/24/20 7:01 PM, Stefano Stabellini wrote:
> > Yes, it does, thank you. I'd rather not introduce unknown regressions so
> > I would recommend to add an arch-specific check on registering
> > freeze/thaw/restore handlers. Maybe something like the following:
> > #ifdef CONFIG_X86
> > .freeze = blkfront_freeze,
> > .thaw = blkfront_restore,
> > .restore = blkfront_restore
> > #endif
> > maybe Boris has a better suggestion on how to do it
> An alternative might be to still install pm notifier in
> drivers/xen/manage.c (I think as result of latest discussions we decided
> we won't need it) and return -ENOTSUPP for ARM for
> PM_HIBERNATION_PREPARE and friends. Would that work?
I think the question here is for registering driver specific freeze/thaw/restore
callbacks for x86 only. I have dropped the pm_notifier in the v3 still pending
testing. So I think just registering driver specific callbacks for x86 only is a
good option. What do you think?