On Mon 16-09-19 18:26:19, Kirill A. Shutemov wrote: > On Fri, Sep 13, 2019 at 02:11:19PM -0700, Lucian Adrian Grijincu wrote: > > As pages are faulted in MLOCK_ONFAULT correctly updates > > /proc/self/smaps, but doesn't update /proc/meminfo's Mlocked field. > > I don't think there's something wrong with this behaviour. It is okay to > keep the page an evictable LRU list (and not account it to NR_MLOCKED). evictable list is an implementation detail. Having an overview about an amount of mlocked pages can be important. Lazy accounting makes this more fuzzy and harder for admins to monitor. Sure it is not a bug to panic about but it certainly makes life of poor admins harder. If there is a pathological THP behavior possible then we should look into that as well. -- Michal Hocko SUSE Labs
