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This test fails routinely in our prod testing environment, and I can reproduce it locally as well. The test allocates dcache inside a cgroup, then drops the memory limit and checks that usage drops correspondingly. The reason it fails is because dentries are freed with an RCU delay - a debugging sleep shows that usage drops as expected shortly after. Insert a 1s sleep after dropping the limit. This should be good enough, assuming that machines running those tests are otherwise not very busy. Link: https://lkml.kernel.org/r/20230801135632.1768830-1-hannes@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Paul E. McKenney <paulmck@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Roman Gushchin <roman.gushchin@linux.dev> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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| .. | ||
| .gitignore | ||
| cgroup_util.c | ||
| cgroup_util.h | ||
| config | ||
| Makefile | ||
| memcg_protection.m | ||
| test_core.c | ||
| test_cpu.c | ||
| test_cpuset_prs.sh | ||
| test_freezer.c | ||
| test_kill.c | ||
| test_kmem.c | ||
| test_memcontrol.c | ||
| test_stress.sh | ||
| wait_inotify.c | ||
| with_stress.sh | ||