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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4A9E7C433F5 for ; Thu, 31 Mar 2022 17:57:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231195AbiCaR7S (ORCPT ); Thu, 31 Mar 2022 13:59:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230416AbiCaR7R (ORCPT ); Thu, 31 Mar 2022 13:59:17 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7E5CE2220D5; Thu, 31 Mar 2022 10:57:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1648749449; x=1680285449; h=subject:to:cc:from:date:message-id; bh=Tni5TvFdZxJ9Gt3pi48UQ12BLf0D4PuKmQOSgUQxUec=; b=MU+RCm7TwQoxw7w8q1UdRlnqNbZ0WzDkC/7GJCouMkQ5O3lSd04woxiy 0QAYVuEryP50PZuBh+TkHztONN95220Oxgg3htp60SPkzTnI3pdiKwaZO f/HOFT2tdlrSMDjD6XK4s0511kFk903zsavkkRVcP+T64GAfuA3XscgEB +JSYSESjk8YQsY67Sgr6rqQAPkizLIqfUbLHZx4Aav2DnvZ+wxM8ZGqsB 1KwUa9g9gIxZaYV0YvJJ/5Hluwk6FNQ96NZ8qlSQj9hftpmvhmj74JsF6 WFSqximRjOC7Na2GCgPzb/8C36+artfcm5UNxrKKwRLFf5v0TsPmGEs1u Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10302"; a="258742366" X-IronPort-AV: E=Sophos;i="5.90,225,1643702400"; d="scan'208";a="258742366" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Mar 2022 10:57:29 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,225,1643702400"; d="scan'208";a="840872318" Received: from davehans-spike.ostc.intel.com (HELO localhost.localdomain) ([10.165.164.11]) by fmsmga005.fm.intel.com with ESMTP; 31 Mar 2022 10:57:28 -0700 Subject: [PATCH] [v2] x86/configs: Add x86 debugging Kconfig fragment plus docs To: linux-kernel@vger.kernel.org Cc: patches@lists.linux.dev, Dave Hansen , corbet@lwn.net, bp@suse.de, tglx@linutronix.de, x86@kernel.org, linux-doc@vger.kernel.org From: Dave Hansen Date: Thu, 31 Mar 2022 10:57:28 -0700 Message-Id: <20220331175728.299103A0@davehans-spike.ostc.intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Changes from v1: * Add actual .config fragment instead of just documenting it * Note that these partially x86-specific, but the rest can be used to test all tip contributions. -- From: Dave Hansen The kernel has a wide variety of debugging options to help catch and squash bugs. However, new debugging is added all the time and the existing options can be hard to find. Add a Kconfig fragment with the debugging options which tip maintainers expect to be used to test contributions. This should make it easier for contributors to test their code and find issues before submission. Signed-off-by: Dave Hansen Cc: Jonathan Corbet Cc: Borislav Petkov Cc: Thomas Gleixner Cc: x86@kernel.org Cc: linux-doc@vger.kernel.org --- b/Documentation/process/maintainer-tip.rst | 14 ++++++++++++++ b/kernel/configs/x86_debug.config | 17 +++++++++++++++++ 2 files changed, 31 insertions(+) diff -puN Documentation/process/maintainer-tip.rst~0001-RFC-Documentation-process-Add-testing-section-to-tip Documentation/process/maintainer-tip.rst --- a/Documentation/process/maintainer-tip.rst~0001-RFC-Documentation-process-Add-testing-section-to-tip 2022-03-31 10:52:55.718665861 -0700 +++ b/Documentation/process/maintainer-tip.rst 2022-03-31 10:52:55.722665862 -0700 @@ -437,6 +437,20 @@ in a private repository which allows int series for testing. The usual way to offer this is a git URL in the cover letter of the patch series. +Testing +^^^^^^^ + +Code should be tested before submitting to the tip maintainers. Anything +other than minor changes should be built, booted and tested with +comprehensive (and heavyweight) kernel debugging options enabled. + +These debugging options can be found in kernel/configs/x86_debug.config +and can be added to an existing kernel config by running: + + make x86_debug.config + +Some of these options are x86-specific and can be left out when testing +on other architectures. Coding style notes ------------------ diff -puN /dev/null kernel/configs/x86_debug.config --- /dev/null 2022-03-26 18:22:40.487999538 -0700 +++ b/kernel/configs/x86_debug.config 2022-03-31 10:53:10.318671042 -0700 @@ -0,0 +1,17 @@ +CONFIG_X86_DEBUG_FPU=y +CONFIG_LOCK_STAT=y +CONFIG_DEBUG_VM=y +CONFIG_DEBUG_VM_VMACACHE=y +CONFIG_DEBUG_VM_RB=y +CONFIG_DEBUG_SLAB=y +CONFIG_DEBUG_KMEMLEAK=y +CONFIG_DEBUG_PAGEALLOC=y +CONFIG_SLUB_DEBUG_ON=y +CONFIG_KMEMCHECK=y +CONFIG_DEBUG_OBJECTS=y +CONFIG_DEBUG_OBJECTS_ENABLE_DEFAULT=1 +CONFIG_GCOV_KERNEL=y +CONFIG_LOCKDEP=y +CONFIG_PROVE_LOCKING=y +CONFIG_SCHEDSTATS=y +CONFIG_VMLINUX_VALIDATION=y _