Re: [Xen-devel] [PATCH RFC 2/2] x86/mm: PG_translate implies PG_refcounts

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Thu, Aug 24, 2017 at 11:05:36AM +0100, Wei Liu wrote:
> On Thu, Aug 24, 2017 at 11:02:33AM +0100, Tim Deegan wrote:
> > At 16:58 +0100 on 23 Aug (1503507504), Wei Liu wrote:
> > > After 404595352 ("x86/paging: Enforce PG_external == PG_translate ==
> > > PG_refcounts"), PG_refcounts and PG_translate always need to be set
> > > together.
> > > 
> > > Squash PG_refcounts to simplify code. All calls paging_mode_refcounts
> > > are replaced by calls to paging_mode_translate.
> > 
> > Would it be a good idea to merge all three and have only PG_external?
> > 
> 
> My reverse-engineering is that when PV guest is migrated it has
> PG_external and (the new) PG_translate.

Sorry, I meant (!PG_external && PG_translate)

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