On Thu 15-03-18 11:28:27, Linus Torvalds wrote: > On Thu, Mar 15, 2018 at 11:21 AM, Michal Hocko <mho...@kernel.org> wrote: > > > > Well, pfn_valid says that a given pfn is backed by a real memory and it > > has a valid struct page backing it. > > No, it really just says the latter. There should be a "struct page" for it.
You are right! A simple example could be non volatile memory. That is certainly not RAM but it has pfn_valid memory. Sorry about the confusion. -- Michal Hocko SUSE Labs
