On Mon, Nov 24, 2025 at 08:38:16PM +0800, Guopeng Zhang wrote:
Replaced the manual sleep and retry logic in test_kmem_dead_cgroups() with the new helper `cg_read_key_long_poll()`. This change improves the robustness of the test by polling the "nr_dying_descendants" counter in `cgroup.stat` until it reaches 0 or the timeout is exceeded.
Additionally, increased the retry timeout to 8 seconds (from 5 seconds) based on testing results:
Why 8 seconds? What does it depend on? For memcg stats I see the 3 seconds driven from the 2 sec periodic rstat flush. Mainly how can we make this more future proof?
- With 5-second timeout: 4/20 runs passed.
- With 8-second timeout: 20/20 runs passed.
Signed-off-by: Guopeng Zhang zhangguopeng@kylinos.cn
Anyways, just add a sentence in the commit message on the reasoning behind 8 seconds and a comment in code as well. With that, you can add:
Reviewed-by: Shakeel Butt shakeel.butt@linux.dev