From patchwork Wed Jan 26 20:13:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shuah Khan X-Patchwork-Id: 12725712 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3BD7BC2BA4C for ; Wed, 26 Jan 2022 20:13:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230060AbiAZUNs (ORCPT ); Wed, 26 Jan 2022 15:13:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54912 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230121AbiAZUNs (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 269FEC06173B for ; Wed, 26 Jan 2022 12:13:48 -0800 (PST) Received: by mail-ot1-x332.google.com with SMTP id x52-20020a05683040b400b0059ea92202daso411381ott.7 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=ZaVBgdTlI5p3LnXF8nfWw/HNWj8TechUrH0tLQ9ETJTxm/LZIZdOV8hXyyQA++w8uC Kj2GMT2HER0Yhg3jJvsmyBV6UoIWa91ngWb6X3nJkfPh0TRt2TAQPB3xduY9k0EvWebz zgVbqGzHb7eFhbkgeZz9xlOtUAeIVvQDz2hNalOXqxFTeoqHIj02qbAZFRrVL97N5vgi G9v3kVF9Vp+RXe8liLs3gze3cg9wcfb3bTJQY6+0lvF5yBgtMlTvVqioetoO0yo56NpN 0ADkMbwQooZKCTu6O+DlyY3Uj42iCUqPVtSMJvmBzt7ouT3WdBthuZrcFBTueUFi5Sig 8mYA== X-Gm-Message-State: AOAM53356RPPHt08McBHX8uZ9lO7d61p6kxB16Mwab5Sd3KITPArlPm7 RcNo91jHg4vNPbtw8HaPQ/TvFQ== X-Google-Smtp-Source: ABdhPJwOLiJkefCmcpRy9PRna8y1Dkefx1bROzrpi2irVbbFBq3filLVRABU/M8eHV6GzXHir5v5Og== 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 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@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: