On Fri 29-06-18 20:15:47, Andrew Morton wrote: [...] > Would one of your earlier designs have addressed all usecases? I > expect the dumb unmap-a-little-bit-at-a-time approach would have? It has been already pointed out that this will not work. You simply cannot drop the mmap_sem during unmap because another thread could change the address space under your feet. So you need some form of VM_DEAD and handle concurrent and conflicting address space operations. -- Michal Hocko SUSE Labs
