From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-182.mta1.migadu.com (out-182.mta1.migadu.com [95.215.58.182]) (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 A472E2D2488 for ; Thu, 12 Feb 2026 08:23:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770884638; cv=none; b=MliwC8tZVklLU3M+vC9diP0N2H2C6/ZcJMJzBjPaclHQdc95xjffKq0yIqwTbPKnv+1jz2aP2jHBPZoIn7osn3NvbBdL2AdpOOMIP55gg+4BLV5i8E3LDF6rQd7Mj0P28c/GJ8HkoI0DjFNJiY3vpS88OlDzGriAvwXd63X24M8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770884638; c=relaxed/simple; bh=nc9UqMakTgTVpIVgbrfrdJ3wNfSWNxcL+yXxgJfcvJo=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=huOFJ9G5eag1yK3Vksf4Nvrf9BjGsS7UTdTAUvmsOt9xftZueiFbJ2yofAWHs4PbIvQSczsG9uN+mM+Me904kol03r737YlO354vdr5zBe3dRTgUq0PrXE8Us9lFb38PEMYL0HG71f5eLfHMWOkOgr98YxW96aHrosXryQG3Hlw= 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=XijP+Aja; arc=none smtp.client-ip=95.215.58.182 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="XijP+Aja" 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=1770884624; 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; bh=nG1F/Kmp6JwkFcrp15JMZNDubf9nKflBRchreJY3ZlM=; b=XijP+AjafbjgMxF/DSBHdAP+2rp4pvVbeq7EN/TaXPqfY/pR/Rh9/uS4pSE0MRoKKY/n6k 29dxRtBU7+TC7UIz82mkX2pafsIH8X30sEEfHjJk+VFee9nJuGpQeBsMg7Lg7hjZ7kl+Xr 6cLpO7nAWVNrWW21hZwdyYyQKsgRNFk= 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 0/3] Fix test_cgroup_iter_memcg issues found during back-porting Date: Thu, 12 Feb 2026 16:23:13 +0800 Message-ID: Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT From: Hui Zhu While back-porting "mm: bpf kfuncs to access memcg data", I encountered issues with test_cgroup_iter_memcg, specifically in test_kmem. The test_cgroup_iter_memcg test would falsely pass when bpf_mem_cgroup_page_state() failed due to incompatible enum values across kernel versions. Additionally, test_kmem would fail on systems with cgroup.memory=nokmem enabled. This series addresses these issues: 1. Add return value checks for bpf_mem_cgroup_page_state() 2. Return error when accessing kmem with nokmem enabled 3. Skip test_kmem when cgroup.memory=nokmem is set Hui Zhu (3): selftests/bpf: Check bpf_mem_cgroup_page_state return value mm/memcontrol: Return error when accessing kmem with nokmem selftests/bpf: Skip test_kmem when cgroup.memory=nokmem mm/memcontrol.c | 3 +- .../bpf/prog_tests/cgroup_iter_memcg.c | 40 +++++++++++++++++++ 2 files changed, 42 insertions(+), 1 deletion(-) -- 2.43.0