From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BF76FEDF055 for ; Thu, 12 Feb 2026 08:23:50 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 7A9006B0005; Thu, 12 Feb 2026 03:23:49 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 7568A6B0089; Thu, 12 Feb 2026 03:23:49 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 68D176B008A; Thu, 12 Feb 2026 03:23:49 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 5976D6B0005 for ; Thu, 12 Feb 2026 03:23:49 -0500 (EST) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 8A06E16072D for ; Thu, 12 Feb 2026 08:23:48 +0000 (UTC) X-FDA: 84435116136.10.6BB39A2 Received: from out-172.mta1.migadu.com (out-172.mta1.migadu.com [95.215.58.172]) by imf13.hostedemail.com (Postfix) with ESMTP id DBF6C20004 for ; Thu, 12 Feb 2026 08:23:46 +0000 (UTC) Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=XijP+Aja; spf=pass (imf13.hostedemail.com: domain of hui.zhu@linux.dev designates 95.215.58.172 as permitted sender) smtp.mailfrom=hui.zhu@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1770884627; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version:content-type: content-transfer-encoding:content-transfer-encoding:in-reply-to: references:dkim-signature; bh=nG1F/Kmp6JwkFcrp15JMZNDubf9nKflBRchreJY3ZlM=; b=COB51w3TmOW06IJUpSDoOy7ZOu47aOWGn9q6/+LLuiNll0Kjs3vhpspCjrtIlYPDBDjo53 oQszJvFe7HotCV56TEoM+EApaL3ls9HIHiqW5RrP7nhINiSkspgO5oAD2E3kS9KardvAoG vb2Jt1Hz4Wu3hCUNIf2eAk3Qf7IBfkY= ARC-Authentication-Results: i=1; imf13.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=XijP+Aja; spf=pass (imf13.hostedemail.com: domain of hui.zhu@linux.dev designates 95.215.58.172 as permitted sender) smtp.mailfrom=hui.zhu@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1770884627; a=rsa-sha256; cv=none; b=bTIeSNcS3++klFS84DuK6mYtIwi3TNPTiCUUN+X+UXsVD+wxqu0/IvFdk+bA9MLhcofhC6 9StP1i/AbGRXJpIL3u6TwTMOXeveRAdTL7KniMO4n7gGFNhHFjZcKOcxM1jc2jo9AzRFLU G+gm23YM4LDtMAjlFN/KG+3+9fbppGg= 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: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspamd-Server: rspam12 X-Stat-Signature: ziufjoto6q3gyfs1z18zorwsb39wcnen X-Rspamd-Queue-Id: DBF6C20004 X-Rspam-User: X-HE-Tag: 1770884626-500195 X-HE-Meta: U2FsdGVkX1/AOG5wP4f6tiniZLoY3gbEOyCecUW1nvNeJvkNxClaOxxzDMuApkq3QT7gtC5hyXeWsZ9dKO5Xa6XtxL/cMfqhF8wSp6Rdb3JIm4ZP7nNel+Zi+vcD0xKbCskeRT7hZWMCezQVRHFuYRQNzP7ve9/b7mFXKeIjiPdF4uCDtsg98lEk5cyDXXW4D9V+nUJiH+sQL24sbAYE3oakAxWpqakVOrv9tGpRX2MjwhmX3WhPX6SIGeUOb7y8Hfb8s9IPv0zDspgHTsQrvPrBL1CPm3r8HgtWeZgu++lB+uWo2EoX93V6XLKP3z3ARRKbFkdBa8IqWSIo13ePnbON72f/RDPOqyXhYmfqyaTY0b32T21TSWDpzoD4LNF8rxM65+d/ZQA3OroMBVvbWtNSSDJG2Nfb6wg6G56t4WpBif9dF/Bz0tkW2AUrvn+fIhTWyDfEzPXr637gqV7wCfCAoYp209oohQ9a8Ad9w0zV/ED85HFUj0LgKdknTAHqp74Okk2TJ4W409rtYP2fOiHEr2tI/AoiTI7/SYcl9oFK9TjXUWbyaGMDJqv6xiQ5dDqPXQxujBhR8HLp/YtJ/Adobv/pNBW7ABhdlQ4RF9QHm+7kDY5hHlsvRqNriKT1Ywv4uLYL6EhDRSTYUx1uefLXlePe6/1HPfkU9/yVXoFSJnDveRw3nnB0XUlYMPcPw0Xhbqr603dGDCuME6re6cwePfixJGxbAI6AER9qvTn6mVj9tPjw+EqJFjY+Bh+e+urOXYEVZSL794UQ4iJWcfks4JPPQstcFM5yytuVYLYp2x2adJ+y+N1qiaUgtBi3b+8ZACo6ct3S8OKQ+MkgWQyocIAA1SigDrUUS+nczFutGf7LlCFdw94I/Y7Ii6J89CG/eP6lXZQcSnFMlqr6uG04Bl0FgzqaA8cbaY/egJzUmH18XPiApbSnAeaGRZuxJk4ZChleaco9V/L1+6Z pg284We6 a0ngPKZ/Um/zvoQvzOy7lQw//lFT0dtpBIGZ7mnHcTUCngdk4WVCSJw9Ym8YqkR9CYmtxzhFv7RjpOcbFVrCwExSXy6P+wXXEmzoN9OHAQyOFL5WtKkgO6SOR2AyCkdGPcJWHgjA56Xp442YsV/RtIbxnJApIg+0OEAKg/rvMcVGCQ3BBXwk5deyg/IFjZ0b5vEhaMHBg3k0I2XYbQ0h3Ygj1T6iafzZTwde9vvWCSQhmxeMmu0Z1dUnXUNTBT3wcjD1DdaS6djZi+bX5t4OA5VoXBXcAL8/9UHpYHzIzFNROrSM= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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