On 22.10.20 10:55, Michal Hocko wrote: > On Thu 22-10-20 10:04:50, David Hildenbrand wrote: > [...] >>> None of that would address the original point of this thread, the global >>> init_on_alloc parameter. >> >> Yes, but I guess we're past that: whatever leaves the buddy shall be >> zeroed out. That's the whole point of that security hardening mechanism. > > Hugetlb can control its zeroying behavior via mount option (for > MAP_HUGETLB controled by a command line parameter). If the page fault > handler can recognize the pre-initialized pages then both init_on* can Right, looking at init_on_alloc tells you if you have to zero after alloc or if it's already been done even though you didn't pass GFP_ZERO. -- Thanks, David / dhildenb
