On Mon 29-01-24 13:45:51, Lance Yang wrote: > khugepaged scans the entire address space in the > background for each given mm, looking for > opportunities to merge sequences of basic pages > into huge pages. However, when an mm is inserted > to the mm_slots list, and the MMF_DISABLE_THP flag > is set later, this scanning process becomes > unnecessary for that mm and can be skipped to avoid > redundant operations, especially in scenarios with > a large address space. Is this a real problem? I thought that the prctl is called on the parent before fork/exec. Or are you aware of any applications which do call prctl late enough that the race would be actually observable? -- Michal Hocko SUSE Labs
