On Thu 24-10-19 07:11:52, Qian Cai wrote: > > > > On Oct 24, 2019, at 3:42 AM, Michal Hocko <mhocko@xxxxxxxxxx> wrote: > > > > It's been useful for debugging memory fragmentation problems and we do > > not have anything that would provide a similar information. Considering > > Actually, zoneinfo and buddyinfo are somewhat similar to it. Why > the extra information in pagetypeinfo is still useful in debugging > today’s real-world scenarios? Because the migrate type is the information that helps to understand fragmentation related issues. I am pretty sure Vlastimil would tell you much more. > > that making it root only is trivial and reducing the lock hold times > > likewise I do not really see any strong reason to dump it at this > > moment. > > There is no need to hurry this, and clearly this is rather a good > opportunity to discuss the consolidation of memory fragmentation > debugging to ease the maintenance in long term. Right. I think we should address the issue at hands first and then handle any possible consolidations. -- Michal Hocko SUSE Labs
