From: hui.zhu@linux.dev
To: bot+bpf-ci@kernel.org, hannes@cmpxchg.org, mhocko@kernel.org,
roman.gushchin@linux.dev, shakeel.butt@linux.dev,
muchun.song@linux.dev, akpm@linux-foundation.org, ast@kernel.org,
daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev,
eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev,
john.fastabend@gmail.com, kpsingh@kernel.org, sdf@fomichev.me,
haoluo@google.com, jolsa@kernel.org, shuah@kernel.org,
zhuhui@kylinos.cn, inwardvessel@gmail.com,
cgroups@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, bpf@vger.kernel.org,
linux-kselftest@vger.kernel.org
Cc: ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net,
martin.lau@kernel.org, eddyz87@gmail.com,
yonghong.song@linux.dev, clm@meta.com, ihor.solodrai@linux.dev
Subject: Re: [PATCH bpf-next 1/3] selftests/bpf: Check bpf_mem_cgroup_page_state return value
Date: Thu, 12 Feb 2026 09:23:00 +0000 [thread overview]
Message-ID: <9302f6e6d89af6b68d673a2f90e366ebcf947e29@linux.dev> (raw)
In-Reply-To: <0d926bdc5b5e030fafc82de73c3f3e5412c051fc6763f77da9ea6aa316bd8f13@mail.kernel.org>
2026年2月12日 16:50, bot+bpf-ci@kernel.org mailto:bot+bpf-ci@kernel.org 写到:
>
> >
> > diff --git a/tools/testing/selftests/bpf/prog_tests/cgroup_iter_memcg.c b/tools/testing/selftests/bpf/prog_tests/cgroup_iter_memcg.c
> > --- a/tools/testing/selftests/bpf/prog_tests/cgroup_iter_memcg.c
> > +++ b/tools/testing/selftests/bpf/prog_tests/cgroup_iter_memcg.c
> >
> [ ... ]
>
> >
> > @@ -170,6 +180,8 @@ static void test_pgfault(struct bpf_link *link, struct memcg_query *memcg_query)
> > if (!ASSERT_OK(read_stats(link), "read stats"))
> > goto cleanup;
> >
> > + ASSERT_NEQ(memcg_query->pgfault, (unsigned long)-1,
> > + "bpf_mem_cgroup_page_state PGFAULT");
> >
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> The assertion message references bpf_mem_cgroup_page_state(), but the BPF
> program actually uses bpf_mem_cgroup_vm_events() to retrieve the pgfault
> value:
>
> tools/testing/selftests/bpf/progs/cgroup_iter_memcg.c:
> memcg_query.pgfault = bpf_mem_cgroup_vm_events(memcg, PGFAULT);
>
> Should the message be "bpf_mem_cgroup_vm_events PGFAULT" instead?
Good catch! I will fix it in the next version.
Best,
Hui
>
> ---
> AI reviewed your patch. Please fix the bug or email reply why it's not a bug.
> See: https://github.com/kernel-patches/vmtest/blob/master/ci/claude/README.md
>
> CI run summary: https://github.com/kernel-patches/bpf/actions/runs/21939182103
>
> AI-authorship-score: low
> AI-authorship-explanation: The commit message uses first-person narrative describing a real back-porting scenario, and the code changes are simple repetitive assertions typical of human-written test improvements.
> issues-found: 1
> issue-severity-score: low
> issue-severity-explanation: Minor documentation issue where an assertion message references the wrong BPF function name; does not affect test correctness or system behavior.
>
next prev parent reply other threads:[~2026-02-12 9:23 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-12 8:23 [PATCH bpf-next 0/3] Fix test_cgroup_iter_memcg issues found during back-porting Hui Zhu
2026-02-12 8:23 ` [PATCH bpf-next 1/3] selftests/bpf: Check bpf_mem_cgroup_page_state return value Hui Zhu
2026-02-12 8:50 ` bot+bpf-ci
2026-02-12 9:23 ` hui.zhu [this message]
2026-02-13 0:14 ` JP Kobryn
2026-02-13 7:29 ` hui.zhu
2026-02-12 8:23 ` [PATCH bpf-next 2/3] mm/memcontrol: Return error when accessing kmem with nokmem Hui Zhu
2026-02-13 0:38 ` JP Kobryn (Meta)
2026-02-12 8:23 ` [PATCH bpf-next 3/3] selftests/bpf: Skip test_kmem when cgroup.memory=nokmem Hui Zhu
2026-02-13 0:41 ` JP Kobryn (Meta)
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