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 X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BF743C43142 for ; Mon, 30 Jul 2018 23:32:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7C1FE20894 for ; Mon, 30 Jul 2018 23:32:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7C1FE20894 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731852AbeGaBKL (ORCPT ); Mon, 30 Jul 2018 21:10:11 -0400 Received: from mailout.easymail.ca ([64.68.200.34]:58831 "EHLO mailout.easymail.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729575AbeGaBKK (ORCPT ); Mon, 30 Jul 2018 21:10:10 -0400 Received: from localhost (localhost [127.0.0.1]) by mailout.easymail.ca (Postfix) with ESMTP id DC6F94171A; Mon, 30 Jul 2018 23:32:48 +0000 (UTC) Received: from mailout.easymail.ca ([127.0.0.1]) by localhost (emo03-pco.easydns.vpn [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id AadnshP2r_YA; Mon, 30 Jul 2018 23:32:48 +0000 (UTC) Received: from [192.168.1.87] (c-24-9-64-241.hsd1.co.comcast.net [24.9.64.241]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mailout.easymail.ca (Postfix) with ESMTPSA id 24415418AC; Mon, 30 Jul 2018 23:32:36 +0000 (UTC) Subject: Re: [PATCH] selftests: membarrier: fix test by checking supported commands To: Rafael David Tinoco , linux-kernel@vger.kernel.org Cc: linux-kselftest@vger.kernel.org, gregkh@linuxfoundation.org, mathieu.desnoyers@efficios.com, mingo@kernel.org, peterz@infradead.org, tglx@linutronix.de, Shuah Khan References: <20180730160543.19056-1-rafael.tinoco@linaro.org> From: Shuah Khan Message-ID: <9edf8459-aea1-c59e-5d73-112e986777e1@kernel.org> Date: Mon, 30 Jul 2018 17:32:30 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20180730160543.19056-1-rafael.tinoco@linaro.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Rafael, On 07/30/2018 10:05 AM, Rafael David Tinoco wrote: > Makes membarrier_test compatible with older kernels (LTS) by checking if > the membarrier features exist before running the tests. > > Link: https://bugs.linaro.org/show_bug.cgi?id=3771 > Signed-off-by: Rafael David Tinoco > Cc: #v4.17 > --- > .../selftests/membarrier/membarrier_test.c | 69 +++++++++++-------- > 1 file changed, 41 insertions(+), 28 deletions(-) > > diff --git a/tools/testing/selftests/membarrier/membarrier_test.c b/tools/testing/selftests/membarrier/membarrier_test.c > index 6793f8ecc8e7..b96caa096e2f 100644 > --- a/tools/testing/selftests/membarrier/membarrier_test.c > +++ b/tools/testing/selftests/membarrier/membarrier_test.c > @@ -225,7 +225,14 @@ static int test_membarrier_global_expedited_success(void) > > static int test_membarrier(void) > { > - int status; > + int supported, status; > + > + supported = sys_membarrier(MEMBARRIER_CMD_QUERY, 0); > + if (supported < 0) { > + ksft_test_result_fail( > + "sys_membarrier() failed to query supported cmds\n"); > + return supported; > + } > ksft_exit_skip() is the right interface to use here. If feature isn't supported, it should exit skip as opposed fail. > status = test_membarrier_cmd_fail(); > if (status) > @@ -236,21 +243,22 @@ static int test_membarrier(void) > status = test_membarrier_global_success(); > if (status) > return status; > - status = test_membarrier_private_expedited_fail(); > - if (status) > - return status; > - status = test_membarrier_register_private_expedited_success(); > - if (status) > - return status; > - status = test_membarrier_private_expedited_success(); > - if (status) > - return status; > - status = sys_membarrier(MEMBARRIER_CMD_QUERY, 0); > - if (status < 0) { > - ksft_test_result_fail("sys_membarrier() failed\n"); > - return status; > + > + /* commit 22e4ebb975822833b083533035233d128b30e98f added this feature */ > + if (supported & MEMBARRIER_CMD_PRIVATE_EXPEDITED) { > + status = test_membarrier_private_expedited_fail(); > + if (status) > + return status; > + status = test_membarrier_register_private_expedited_success(); > + if (status) > + return status; > + status = test_membarrier_private_expedited_success(); > + if (status) > + return status; > } > - if (status & MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE) { > + > + /* commit 70216e18e519a54a2f13569e8caff99a092a92d6 added this feature */ > + if (supported & MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE) { > status = test_membarrier_private_expedited_sync_core_fail(); > if (status) > return status; > @@ -261,19 +269,24 @@ static int test_membarrier(void) > if (status) > return status; > } > - /* > - * It is valid to send a global membarrier from a non-registered > - * process. > - */ > - status = test_membarrier_global_expedited_success(); > - if (status) > - return status; > - status = test_membarrier_register_global_expedited_success(); > - if (status) > - return status; > - status = test_membarrier_global_expedited_success(); > - if (status) > - return status; > + > + /* commit c5f58bd58f432be5d92df33c5458e0bcbee3aadf added this feature */ > + if (supported & MEMBARRIER_CMD_GLOBAL_EXPEDITED) { > + /* > + * It is valid to send a global membarrier from a non-registered > + * process. > + */ > + status = test_membarrier_global_expedited_success(); > + if (status) > + return status; > + status = test_membarrier_register_global_expedited_success(); > + if (status) > + return status; > + status = test_membarrier_global_expedited_success(); > + if (status) > + return status; > + } > + > return 0; > } > > thanks, -- Shuah