On Mon, Nov 24, 2025 at 08:38:13PM +0800, Guopeng Zhang wrote:
> Hi all,
> 
> This patch series introduces improvements to the cgroup selftests by adding helper functions to better handle 
> asynchronous updates in cgroup statistics. These changes are especially useful for managing cgroup stats like 
> memory.stat and cgroup.stat, which can be affected by delays (e.g., RCPU callbacks and asynchronous rstat flushing).
> 
> v4:
>  - Patch 1/3: Adds the `cg_read_key_long_poll()` helper to poll cgroup keys with retries and configurable intervals.
>  - Patch 2/3: Updates `test_memcg_sock()` to use `cg_read_key_long_poll()` for handling delayed "sock" counter updates in memory.stat.
>  - Patch 3/3: Replaces `sleep` and retry logic in `test_kmem_dead_cgroups()` with `cg_read_key_long_poll()` for waiting on `nr_dying_descendants`.

Michal, if this looks good to you, I'll apply after the merge window.

Thanks.

-- 
tejun