From: Tejun Heo <tj@kernel.org>
To: Guopeng Zhang <zhangguopeng@kylinos.cn>
Cc: hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev,
shakeel.butt@linux.dev, mkoutny@suse.com, muchun.song@linux.dev,
lance.yang@linux.dev, shuah@kernel.org, linux-mm@kvack.org,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 0/3] selftests: cgroup: Enhance robustness with polling helpers
Date: Mon, 1 Dec 2025 19:45:58 -1000 [thread overview]
Message-ID: <aS59Fjm1iL5U3-Fn@slm.duckdns.org> (raw)
In-Reply-To: <20251124123816.486164-1-zhangguopeng@kylinos.cn>
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
prev parent reply other threads:[~2025-12-02 5:46 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-24 12:38 Guopeng Zhang
2025-11-24 12:38 ` [PATCH v4 1/3] selftests: cgroup: Add cg_read_key_long_poll() to poll a cgroup key with retries Guopeng Zhang
2025-12-02 19:24 ` Shakeel Butt
2025-11-24 12:38 ` [PATCH v4 2/3] selftests: cgroup: make test_memcg_sock robust against delayed sock stats Guopeng Zhang
2025-11-27 10:55 ` Lance Yang
2025-11-27 11:18 ` Guopeng Zhang
2025-11-27 11:29 ` Lance Yang
2025-12-02 23:12 ` Shakeel Butt
2025-12-03 3:27 ` Guopeng Zhang
2025-11-24 12:38 ` [PATCH v4 3/3] selftests: cgroup: Replace sleep with cg_read_key_long_poll() for waiting on nr_dying_descendants Guopeng Zhang
2025-12-02 23:18 ` Shakeel Butt
2025-12-03 3:32 ` Guopeng Zhang
2025-12-02 5:45 ` Tejun Heo [this message]
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