From nobody Thu Apr 2 20:18:22 2026 Received: from out-183.mta1.migadu.com (out-183.mta1.migadu.com [95.215.58.183]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3F1C821FF55 for ; Thu, 12 Feb 2026 08:24:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.183 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770884646; cv=none; b=UCkw+idxvdc/dgsoutDEprem1ec4DvhYawMe1Gfo8qFk1nJqkEfvGY0dP8IHtQ79VLuXGOpWOckVkYNSk7K7jJU1BJJJr4PTzztLQcTSfwEWn/VsfXsCVoA2eLBvUc/69L25G29+yMd3pD0WMypbzegYsNdR69Sa0RkKgy1jjyo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770884646; c=relaxed/simple; bh=Yw/U2u1kO0ZIn9Mc2bMQ0zLjlvy7XjdcIIQ7GR3MAd4=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YlXqiaZq2HzeE+wqENaLTQXCW14H06XyLjd/GXhj2Xq8tCu8hVJyxCaD1SSC9Pc8jELuxpNgSdjn2NpgPON8hYpTu2iW0W/cC2ddTbThq48lZ3YpUuRrlGanNkyoOMqig4u+t/7N4vH6lJqnODzRv0BwPhjX0vm4AhMxU92ncKU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=mtLG1Cj7; arc=none smtp.client-ip=95.215.58.183 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="mtLG1Cj7" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1770884643; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Qa7yRxcpGL3PnKF4R1l2meMqj6ZYK13/0dyEKREpmhI=; b=mtLG1Cj7F/NN0pQvl1k5tAmMqtzQ0Q7TM4SCVi9GMjgpIDSLSvRuNgxNUBKEWiMccVbj7z K8W4rDks82e97Z8KcgkhM8a3y1wY/HTQgqGjhSAkMrndvzi66dbkI4Pxi7c8hQrM0ljZR8 mAMheL03KE5ojdB75JZXNKsapNcnw0A= From: Hui Zhu To: Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , Muchun Song , Andrew Morton , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Shuah Khan , Hui Zhu , JP Kobryn , cgroups@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH bpf-next 3/3] selftests/bpf: Skip test_kmem when cgroup.memory=nokmem Date: Thu, 12 Feb 2026 16:23:16 +0800 Message-ID: <2f6ee1db173b67a636b2caa85744cb4ce8114e64.1770883926.git.zhuhui@kylinos.cn> In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Migadu-Flow: FLOW_OUT Content-Type: text/plain; charset="utf-8" From: Hui Zhu When cgroup.memory=3Dnokmem is set in kernel command line, kmem accounting is disabled and the test_kmem subtest will fail. Add a check to skip this test when the parameter is present. Signed-off-by: Hui Zhu --- .../bpf/prog_tests/cgroup_iter_memcg.c | 28 +++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/cgroup_iter_memcg.c b/t= ools/testing/selftests/bpf/prog_tests/cgroup_iter_memcg.c index 13b299512429..203e6b091a21 100644 --- a/tools/testing/selftests/bpf/prog_tests/cgroup_iter_memcg.c +++ b/tools/testing/selftests/bpf/prog_tests/cgroup_iter_memcg.c @@ -134,11 +134,39 @@ static void test_shmem(struct bpf_link *link, struct = memcg_query *memcg_query) shm_unlink("/tmp_shmem"); } =20 +static bool cmdline_has(const char *arg) +{ + char cmdline[4096]; + int fd; + ssize_t len; + bool ret =3D false; + + fd =3D open("/proc/cmdline", O_RDONLY); + if (fd < 0) + return false; + + len =3D read(fd, cmdline, sizeof(cmdline) - 1); + close(fd); + if (len < 0) + return false; + + cmdline[len] =3D '\0'; + if (strstr(cmdline, arg)) + ret =3D true; + + return ret; +} + #define NR_PIPES 64 static void test_kmem(struct bpf_link *link, struct memcg_query *memcg_que= ry) { int fds[NR_PIPES][2], i; =20 + if (cmdline_has("cgroup.memory=3Dnokmem")) { + test__skip(); + return; + } + /* * Increase kmem value by creating pipes which will allocate some * kernel buffers. --=20 2.43.0