Andrii Nakryiko <andrii.nakryiko@xxxxxxxxx> writes: >> [root@(none) bpf]# ./test_progs -t map_in_map >> test_lookup_update:PASS:skel_open 0 nsec >> test_lookup_update:PASS:skel_attach 0 nsec >> test_lookup_update:PASS:inner1 0 nsec >> test_lookup_update:PASS:inner2 0 nsec >> test_lookup_update:PASS:inner1 0 nsec >> test_lookup_update:PASS:inner2 0 nsec >> test_lookup_update:PASS:map1_id 0 nsec >> test_lookup_update:PASS:map2_id 0 nsec >> kern_sync_rcu:PASS:inner_map_create 0 nsec >> kern_sync_rcu:PASS:outer_map_create 0 nsec >> kern_sync_rcu:PASS:outer_map_update 0 nsec >> test_lookup_update:PASS:sync_rcu 0 nsec >> kern_sync_rcu:PASS:inner_map_create 0 nsec >> kern_sync_rcu:PASS:outer_map_create 0 nsec >> kern_sync_rcu:PASS:outer_map_update 0 nsec >> test_lookup_update:PASS:sync_rcu 0 nsec > > try adding sleep(few seconds, enough for RCU grace period to pass) > here and see if that helps > > if not, please printk() around to see why the inner_map1 wasn't freed Aha, found it! It happened because my kernel was built with PREEMPT_VOLUNTARY. Changing that to PREEMPT fixed the test, and got me to: Summary: 116/853 PASSED, 14 SKIPPED, 0 FAILED So yay! Thanks for your help with debugging :) -Toke
