From patchwork Mon May 27 06:28:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Shi X-Patchwork-Id: 10962159 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 624591390 for ; Mon, 27 May 2019 06:29:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4F85428ADE for ; Mon, 27 May 2019 06:29:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4382F28AEB; Mon, 27 May 2019 06:29:27 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CB7B228AE0 for ; Mon, 27 May 2019 06:29:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725943AbfE0G3N (ORCPT ); Mon, 27 May 2019 02:29:13 -0400 Received: from out30-44.freemail.mail.aliyun.com ([115.124.30.44]:54338 "EHLO out30-44.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726326AbfE0G3M (ORCPT ); Mon, 27 May 2019 02:29:12 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R191e4;CH=green;DM=||false|;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04423;MF=alex.shi@linux.alibaba.com;NM=1;PH=DS;RN=9;SR=0;TI=SMTPD_---0TSmgVed_1558938535; Received: from localhost(mailfrom:alex.shi@linux.alibaba.com fp:SMTPD_---0TSmgVed_1558938535) by smtp.aliyun-inc.com(127.0.0.1); Mon, 27 May 2019 14:28:55 +0800 From: Alex Shi To: cgroups@vger.kernel.org Cc: Alex Shi , Shuah Khan , Roman Gushchin , Tejun Heo , Mike Rapoport , Jay Kamat , linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 1/3] kselftest/cgroup: fix unexpected testing failure on test_memcontrol Date: Mon, 27 May 2019 14:28:05 +0800 Message-Id: <20190527062807.93404-1-alex.shi@linux.alibaba.com> X-Mailer: git-send-email 2.19.1.856.g8858448bb MIME-Version: 1.0 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The cgroup testing relies on the root cgroup's subtree_control setting, If the 'memory' controller isn't set, all test cases will be failed as following: $ sudo ./test_memcontrol not ok 1 test_memcg_subtree_control not ok 2 test_memcg_current ok 3 # skip test_memcg_min not ok 4 test_memcg_low not ok 5 test_memcg_high not ok 6 test_memcg_max not ok 7 test_memcg_oom_events ok 8 # skip test_memcg_swap_max not ok 9 test_memcg_sock not ok 10 test_memcg_oom_group_leaf_events not ok 11 test_memcg_oom_group_parent_events not ok 12 test_memcg_oom_group_score_events To correct this unexpected failure, this patch write the 'memory' to subtree_control of root to get a right result. Signed-off-by: Alex Shi Cc: Shuah Khan Cc: Roman Gushchin Cc: Tejun Heo Cc: Mike Rapoport Cc: Jay Kamat Cc: linux-kselftest@vger.kernel.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Roman Gushchin Acked-by: Tejun Heo --- tools/testing/selftests/cgroup/test_memcontrol.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testing/selftests/cgroup/test_memcontrol.c index 6f339882a6ca..c19a97dd02d4 100644 --- a/tools/testing/selftests/cgroup/test_memcontrol.c +++ b/tools/testing/selftests/cgroup/test_memcontrol.c @@ -1205,6 +1205,10 @@ int main(int argc, char **argv) if (cg_read_strstr(root, "cgroup.controllers", "memory")) ksft_exit_skip("memory controller isn't available\n"); + if (cg_read_strstr(root, "cgroup.subtree_control", "memory")) + if (cg_write(root, "cgroup.subtree_control", "+memory")) + ksft_exit_skip("Failed to set memory controller\n"); + for (i = 0; i < ARRAY_SIZE(tests); i++) { switch (tests[i].fn(root)) { case KSFT_PASS: