Re: [Xen-devel] [PATCH v5] xen: don't save/restore the physmap on VM save/restore

[Anthony PERARD <anthony.perard@xxxxxxxxxx>]

On Thu, Mar 16, 2017 at 02:46:56PM +0000, Anthony PERARD wrote:
> On Thu, Mar 16, 2017 at 02:06:21PM +0000, Igor Druzhinin wrote:
> > On 16/03/17 12:54, Igor Druzhinin wrote:
> > > On 16/03/17 12:26, Anthony PERARD wrote:
> > >> I've tried to migrate a guest with this patch, but once migrated, the
> > >> screen is black (via VNC, keyboard is working fine).
> > >>
> > > Hmm. It works for me - I've tried to migrate between identical QEMUs
> > > with this patch on localhost. Save/restore also works fine.
> > > 
> > Ok. I could track down the issue - starting from v4 the patch doesn't
> > work for cirrus. The reason is that post_load handler is different for
> > cirrus and doesn't call the parent handler from common vga code.
> > 
> > I manage to fix it by updating the corresponding handler by duplicating
> > the code. But is it a good solution? Would it be better to have the
> > common handler called in this function instead?
> 
> :(, vga_common_post_load have a misleading name. Yes, I think it would
> be better to have a common post_load been called by every vga cards.

The issue is probably more complicated than I thought, as
vga_common_post_load is probably not called because cirrus does not use
vmstate_vga_common struct.

-- 
Anthony PERARD

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