Re: [PATCH] mm/vmstat: Reduce zone lock hold time when reading /proc/pagetypeinfo

[Qian Cai]

> 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 todayâs real-world scenarios?

> 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.