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=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no 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 78733C54EEB for ; Tue, 24 Mar 2020 18:21:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 577132076E for ; Tue, 24 Mar 2020 18:21:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="iyhktkum" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728047AbgCXSVA (ORCPT ); Tue, 24 Mar 2020 14:21:00 -0400 Received: from mail-pl1-f196.google.com ([209.85.214.196]:44388 "EHLO mail-pl1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728078AbgCXSU7 (ORCPT ); Tue, 24 Mar 2020 14:20:59 -0400 Received: by mail-pl1-f196.google.com with SMTP id h11so7732627plr.11 for ; Tue, 24 Mar 2020 11:20:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=pT25UnZw8GM7Hd21OQrxHvPDWru16NnMVVxodL4fKVA=; b=iyhktkumgD/jnOyy/wrt8dXzir+rVbxsCaX0F1NIU968y/5PKrYcKlaC+EUgsXxoD1 qRnZuBoGJVEq/iPtymBbiQq/d0t+3o76Vg7pmHHpXjJtM7UuE+MA3iFeocbUrYXAjiQM Z6sejDHA46aOnvzsmPK6WvTcsSKcktL/hzcag= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=pT25UnZw8GM7Hd21OQrxHvPDWru16NnMVVxodL4fKVA=; b=oWhzuJqYex37uqmH8w0OzBVqq9jeDVO5apw8ykhT/uQqT8piApHg5zzwzee7FR2huN 7kYZgToRypPCKiS1MZolQNRsNKbhAAkGWdewuilvykbqRFbRf8Z70bHpUUIHL3E3WSgL caaGobuMeC1W7lHXwHoum9ACj+IslobQUcXm8DhGdrDRz6jbxwlpfp4uYmZy5KwYkGGn ny2+A8gadzlV5jD0iy6Pd1PVaP+Xbo3iMnUIw29wAQAJbGMUDKbnCbzxbAj9CX2WDykW YyxxeerRUVfdq5cwdHOG6lzz0aEKLXNqLRjgmBfvNhixD4QnLhuWcof96Br8E2fqAhsz gleA== X-Gm-Message-State: ANhLgQ0IYGkmsU0I0iB0N7KwkoDganKAODc3/h/0Xfzl5m4pvhUioDyc nB6zNCweUpG8XRB1QUaII3jR+A== X-Google-Smtp-Source: ADFU+vsbUZvpEd+JNrfXu3SDrVaKk1GB6LCcXwZqBJNz0+KcmuSLdw3UClszpGNl3JJHmzGTOgzQXQ== X-Received: by 2002:a17:90a:3349:: with SMTP id m67mr6643283pjb.175.1585074057290; Tue, 24 Mar 2020 11:20:57 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id w31sm15114250pgl.84.2020.03.24.11.20.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Mar 2020 11:20:56 -0700 (PDT) Date: Tue, 24 Mar 2020 11:20:55 -0700 From: Kees Cook To: "Guilherme G. Piccoli" Cc: Vlastimil Babka , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-doc@vger.kernel.org, mcgrof@kernel.org, yzaikin@google.com, tglx@linutronix.de, penguin-kernel@I-love.SAKURA.ne.jp, akpm@linux-foundation.org, cocci@systeme.lip6.fr, linux-api@vger.kernel.org, kernel@gpiccoli.net, randy Dunlap Subject: Re: [PATCH V2] kernel/hung_task.c: Introduce sysctl to print all traces when a hung task is detected Message-ID: <202003241119.A666E1C694@keescook> References: <20200323214618.28429-1-gpiccoli@canonical.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org On Tue, Mar 24, 2020 at 09:45:40AM -0300, Guilherme G. Piccoli wrote: > Thanks Randy and Vlastimil for the comments. I really liked your > approach Vlastimil, I agree that we have no reason to not have a generic > sysctl setting via cmdline mechanism - I'll rework this patch removing > the kernel parameter (same for other patch I just submitted). I've been thinking we'll likely want to have a big patch series that removes all the old "duplicate" boot params and adds some kind of "alias" mechanism. Vlastimil, have you happened to keep a list of other "redundant" boot params you've noticed in the kernel? I bet there are a lot. :) -- Kees Cook