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[23.128.96.18]) by mx.google.com with ESMTP id t2si205689edf.543.2022.01.26.14.36.55; Wed, 26 Jan 2022 14:37:21 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=google header.b="EiCjf/dX"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230130AbiAZUNt (ORCPT + 99 others); Wed, 26 Jan 2022 15:13:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54910 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230116AbiAZUNs (ORCPT ); Wed, 26 Jan 2022 15:13:48 -0500 Received: from mail-ot1-x332.google.com (mail-ot1-x332.google.com [IPv6:2607:f8b0:4864:20::332]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2666DC06161C for ; Wed, 26 Jan 2022 12:13:48 -0800 (PST) Received: by mail-ot1-x332.google.com with SMTP id q19-20020a056830441300b0059a54d66106so474726otv.0 for ; Wed, 26 Jan 2022 12:13:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=pzbj8zCgavNPOsqdAJKfKx15yXUuBarV4g88BfwJ5Uw=; b=EiCjf/dXx6PcwQfYyD5Mtu4jSLNd5zEa47wWx2U5haMMbtJEQhSPeTaHqEOzI96wE+ 2RGa+InuUKeD//habRPfunHmUIU05w2nCr0vL/0LA71m8HO9bM2k0p26IOaae29ZCfw6 3LkAnT/jvGR05sDRNIQR+dYLOxsdW7rR1X7Rg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=pzbj8zCgavNPOsqdAJKfKx15yXUuBarV4g88BfwJ5Uw=; b=woDgjQ6G4j+a0B0jDreyti0YvRjmCZQdOPeKoXSxLzox/u6jfe+0I7OHLtrgdu7ZRu 2EMBFN+vJKz240jAyPyB4im/X9Aym/6z4Bu9li4synnaGMYASpmk4YK6wipGlgLA5FdD XMpB1EhFzjWjp27RDuhG1dkoXYdimjLu9DCLEs6Lx6HxRZscYsP6ohlzaXEP3/EjFtg5 FKxH6BwbQJeVvmJb/kLYGuMdSVK4hdQ5sfo/YfI6bb5HA827cA5YXOzZG3a7tG5JwOx2 5kdoViRZBE3h+GLgFCvFZX3ku/6tKrVOmktuCJQLRrANNvEyfTcCENZKx8CDkteUnNKl 3How== X-Gm-Message-State: AOAM533ANtd6S5uP7AIzW5/T5lrlxmUuhlDOeajkSO02/uI78J5XFqyR leYAd27aqJpYoRUiuLRlFPcPqA== X-Received: by 2002:a05:6830:4491:: with SMTP id r17mr319589otv.112.1643228027463; Wed, 26 Jan 2022 12:13:47 -0800 (PST) Received: from shuah-tx13.internal ([71.205.29.0]) by smtp.gmail.com with ESMTPSA id a128sm5993573oob.17.2022.01.26.12.13.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Jan 2022 12:13:47 -0800 (PST) From: Shuah Khan To: shuah@kernel.org, corbet@lwn.net Cc: Shuah Khan , linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] docs/kselftest: clarify running mainline tests on stables Date: Wed, 26 Jan 2022 13:13:41 -0700 Message-Id: <20220126201341.55771-1-skhan@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Update the document to clarifiy support for running mainline kselftest on stable releases and the reasons for not removing test code that can test older kernels. Signed-off-by: Shuah Khan --- Documentation/dev-tools/kselftest.rst | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/dev-tools/kselftest.rst b/Documentation/dev-tools/kselftest.rst index dcefee707ccd..a833ecf12fbc 100644 --- a/Documentation/dev-tools/kselftest.rst +++ b/Documentation/dev-tools/kselftest.rst @@ -7,6 +7,14 @@ directory. These are intended to be small tests to exercise individual code paths in the kernel. Tests are intended to be run after building, installing and booting a kernel. +Kselftest from mainline can be run on older stable kernels. Running tests +from mainline offers the best coverage. Several test rings run mainline +kselftest suite on stable releases. The reason is that when a new test +gets added to test existing code to regression test a bug, we should be +able to run that test on an older kernel. Hence, it is important to keep +code that can still test an older kernel and make sure it skips the test +gracefully on newer releases. + You can find additional information on Kselftest framework, how to write new tests using the framework on Kselftest wiki: -- 2.32.0