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Fri, 18 Sep 2026 08:41:18 -0700 (PDT) Content-Type: text/plain; charset=UTF-8 Date: Fri, 18 Sep 2026 15:41:12 +0000 Message-Id: Cc: "Hui Zhu" Subject: Re: [PATCH bpf-next v12 2/2] selftests/bpf: Add memcg async reclaim test From: "Alexei Starovoitov" To: "Hui Zhu" , "Roman Gushchin" , "JP Kobryn" , "Shakeel Butt" , "Andrew Morton" , "Andrii Nakryiko" , "Eduard Zingerman" , "Ihor Solodrai" , "Daniel Borkmann" , "Kumar Kartikeya Dwivedi" , "Martin KaFai Lau" , "Song Liu" , "Yonghong Song" , "Jiri Olsa" , "Emil Tsalapatis" , "Shuah Khan" , "David Hildenbrand" , "Barry Song" , "Geliang Tang" , , , , In-Reply-To: <44f7fcfafd5f33072dd2b9abc31aa9bf5eacd9bb.1789714023.git.zhuhui@kylinos.cn> References: <44f7fcfafd5f33072dd2b9abc31aa9bf5eacd9bb.1789714023.git.zhuhui@kylinos.cn> X-Mailer: mkdraft (claude review draft; edit before sending) Content-Transfer-Encoding: 8bit MIME-Version: 1.0 X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 41FB3C0003 X-Stat-Signature: ry58hrjm48zx5kzu9e8ryrpjot5768xx X-HE-Tag: 1789746081-461545 X-HE-Meta: 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 eNYG614Z 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Sep 18, 2026 at 02:58 PM Hui Zhu wrote: > From: Hui Zhu > > Exercise BPF-driven async proactive reclaim. A BPF program watches the > refault stats of a memory-pressured cgroup and, once they grow, reclaims > a second cgroup from a bpf_wq callback through bpf_proactive_reclaim(). > Pass/fail rests on the reclaim counters. The workload timings are a > benchmark, not a criterion, so they are logged only under > TEST_MEMCG_ASYNC_RECLAIM_BENCH=1, which also runs a baseline without the > BPF program, recreating the cgroups in between so both runs start cold. [...] > Signed-off-by: Hui Zhu > --- > tools/testing/selftests/bpf/config | 1 + > .../bpf/prog_tests/memcg_async_reclaim.c | 890 ++++++++++++++++++ > .../selftests/bpf/progs/memcg_async_reclaim.c | 327 +++++++ > 3 files changed, 1218 insertions(+) 1200 lines of selftest for a 20 line kfunc ? Sorry that's an overkill. pw- bot: cr