On Thu 15-03-18 15:48:47, Ard Biesheuvel wrote: > On 15 March 2018 at 15:34, Daniel Vacek <ne...@redhat.com> wrote: [...] > > Hence I was asking what is the abstract meaning > > of it. As I see two *way_different* implementations so I am not sure > > how I should understand that. > > > > My interpretation is that it has a struct page associated with it, but > it seems the semantics of pfn_valid() aren't well defined.
Well, pfn_valid says that a given pfn is backed by a real memory and it has a valid struct page backing it. -- Michal Hocko SUSE Labs
