Created attachment 856923 [details] effective low trace 5.16.11-default-g5ad8974ceb48, test from [1] A/B/C black line A/B/D yellow line A/B/F (lower) blue line first part: alloc anon: 148 MB second part: alloc anon 166 MB (initially w/out reclaim later cuts into A/B) [1] https://lore.kernel.org/ltp/20220222124547.14396-3-rpalethorpe@suse.com/