From nobody Thu Apr 2 20:18:22 2026 Received: from out-185.mta0.migadu.com (out-185.mta0.migadu.com [91.218.175.185]) (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 3B7A2201278 for ; Tue, 3 Mar 2026 05:54:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.185 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772517271; cv=none; b=Y555nTaKz6VH/Eg1JedDDj8mXq4F4u53Hm2DsKquYrh79cT7OG+rMebRn5IAoOS/+bsbJAitSpUDEseeep34u5sZrNeVAcWfeU9Rwq98l1+lgPF/LDPSz0lhx+2PXauV6qkJ+PIeDQsAsw3HoSHCbe5UXQaeenQicDkOSkE8f/k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772517271; c=relaxed/simple; bh=6qzHlh10MApeXv7yMNlEmX5cSN6GyQGLqmitHm1kE4g=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kJ33RwYx+j634kGCN/CsmoKLoBZmBzbsrrWg+v7wCOKu+3GwV5FEGpz5aT0Erkb2N7AeaNMNZ0sg9FM93/mzHIAbBCFFs5n+QmOsWuDeofKh8HfYmuNigIOasubE5a+AldcPkvMF+z1B4dHCa5geGtpgEzdkO3+NRLyHKmX5IOA= 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=iqW7blNx; arc=none smtp.client-ip=91.218.175.185 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="iqW7blNx" 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=1772517268; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=l6eJEYFrb9LvZqYh0Q45H8GvoxLpNshzFBYH4l9HNuk=; b=iqW7blNxfgMMwNnwuepiufW6U7e5cTFabi7kyBfFiPesIN6hDT91skoAwlY4cZ8ekKRc+o K5QrgLyiwFzkvMBCd2RQLWQNjheKc5eUVoyG68nIoMG+jCQemLoGPj/kEn1XDjaYkI6Eud aRJ/G5foVMSVgcFnUTneZ68dOf+qxmo= From: Hui Zhu To: 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 , JP Kobryn , Roman Gushchin , Emil Tsalapatis , bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Hui Zhu , JP Kobryn Subject: [PATCH bpf-next v5 2/2] bpf: Use bpf_core_enum_value for stats in cgroup_iter_memcg Date: Tue, 3 Mar 2026 13:53:09 +0800 Message-ID: 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 Replace hardcoded enum values with bpf_core_enum_value() calls in cgroup_iter_memcg test to improve portability across different kernel versions. The change adds runtime enum value resolution for: - node_stat_item: NR_ANON_MAPPED, NR_SHMEM, NR_FILE_PAGES, NR_FILE_MAPPED - vm_event_item: PGFAULT This ensures the BPF program can adapt to enum value changes between kernel versions. Reviewed-by: Emil Tsalapatis Reviewed-by: JP Kobryn Signed-off-by: Hui Zhu --- .../selftests/bpf/progs/cgroup_iter_memcg.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/cgroup_iter_memcg.c b/tools/= testing/selftests/bpf/progs/cgroup_iter_memcg.c index 12f79a44133e..06a385c9d85b 100644 --- a/tools/testing/selftests/bpf/progs/cgroup_iter_memcg.c +++ b/tools/testing/selftests/bpf/progs/cgroup_iter_memcg.c @@ -26,11 +26,18 @@ int cgroup_memcg_query(struct bpf_iter__cgroup *ctx) =20 bpf_mem_cgroup_flush_stats(memcg); =20 - memcg_query.nr_anon_mapped =3D bpf_mem_cgroup_page_state(memcg, NR_ANON_M= APPED); - memcg_query.nr_shmem =3D bpf_mem_cgroup_page_state(memcg, NR_SHMEM); - memcg_query.nr_file_pages =3D bpf_mem_cgroup_page_state(memcg, NR_FILE_PA= GES); - memcg_query.nr_file_mapped =3D bpf_mem_cgroup_page_state(memcg, NR_FILE_M= APPED); - memcg_query.pgfault =3D bpf_mem_cgroup_vm_events(memcg, PGFAULT); + memcg_query.nr_anon_mapped =3D bpf_mem_cgroup_page_state( + memcg, + bpf_core_enum_value(enum node_stat_item, NR_ANON_MAPPED)); + memcg_query.nr_shmem =3D bpf_mem_cgroup_page_state( + memcg, bpf_core_enum_value(enum node_stat_item, NR_SHMEM)); + memcg_query.nr_file_pages =3D bpf_mem_cgroup_page_state( + memcg, bpf_core_enum_value(enum node_stat_item, NR_FILE_PAGES)); + memcg_query.nr_file_mapped =3D bpf_mem_cgroup_page_state( + memcg, + bpf_core_enum_value(enum node_stat_item, NR_FILE_MAPPED)); + memcg_query.pgfault =3D bpf_mem_cgroup_vm_events( + memcg, bpf_core_enum_value(enum vm_event_item, PGFAULT)); =20 bpf_put_mem_cgroup(memcg); =20 --=20 2.43.0