On Thu, Oct 14, 2021 at 12:24:50PM -0700, Darrick J. Wong wrote: > It feels a little dangerous to have page->mapping for shared storage > point to an actual address_space when there are really multiple > potential address_spaces out there. If the mm or dax folks are ok with > doing this this way then I'll live with it, but it seems like you'd want > to leave /some/ kind of marker once you know that the page has multiple > owners and therefore regular mm rmap via page->mapping won't work. Yes, I thing poisoning page->mapping for the rmap enabled case seems like a better idea.
