On Wed 17-02-21 14:46:49, Oscar Salvador wrote: > On Wed, Feb 17, 2021 at 02:36:31PM +0100, Michal Hocko wrote: > > On Wed 17-02-21 11:08:16, Oscar Salvador wrote: > > > In-use hugetlb pages can be migrated as any other page (LRU > > > and Movable), so let alloc_contig_range handle them. > > > > > > All we need is to succesfully isolate such page. > > > > Again, this is missing a problem statement and a justification why we > > want/need this. > > Heh, I was poor in words. > > "alloc_contig_range() will fail miserably if it finds a HugeTLB page within > the range without a chance to handle them. Since HugeTLB pages can be migrated > as any other page (LRU and Movable), it does not make sense to bail out. > Enable the interface to recognize in-use HugeTLB pages and have a chance > to migrate them" > > What about something along those lines? Is this a real life problem? I know we _can_ but I do not see any reasoning _why_ should we care all that much. -- Michal Hocko SUSE Labs
