On Mon 25-01-21 14:12:02, Michal Hocko wrote: > On Thu 21-01-21 09:55:00, Minchan Kim wrote: > > Contiguous memory allocation can be stalled due to waiting > > on page writeback and/or page lock which causes unpredictable > > delay. It's a unavoidable cost for the requestor to get *big* > > contiguous memory but it's expensive for *small* contiguous > > memory(e.g., order-4) because caller could retry the request > > in different range where would have easy migratable pages > > without stalling. > > > > This patch introduce __GFP_NORETRY as compaction gfp_mask in > > alloc_contig_range so it will fail fast without blocking > > when it encounters pages needed waiting. > > I am not against controling how hard this allocator tries with gfp mask > but this changelog is rather void on any data and any user. OK, I can see that a user is in the last patch. -- Michal Hocko SUSE Labs
