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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 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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