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 AEED6C433F5 for ; Wed, 30 Mar 2022 17:25:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349277AbiC3R1c (ORCPT ); Wed, 30 Mar 2022 13:27:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55836 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349321AbiC3R1Q (ORCPT ); Wed, 30 Mar 2022 13:27:16 -0400 Received: from mail-ej1-x62f.google.com (mail-ej1-x62f.google.com [IPv6:2a00:1450:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 45AF4F1E94 for ; Wed, 30 Mar 2022 10:25:26 -0700 (PDT) Received: by mail-ej1-x62f.google.com with SMTP id bq8so28970757ejb.10 for ; Wed, 30 Mar 2022 10:25:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chrisdown.name; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=Q6BSRurhLMQkfcWq5OJAf1CntoIc8amS1dBRFgg+9Sg=; b=cT2d1lY9Qd9dLaCi0ApDkafMn2V6YBSEqyWDAQ+aSN7Bn6gVYrBnH9/iT4IGj2mfHU cVVgvqh83+WEDG5IfPBuABVaguu/3c+GjrdPOmFcx8XJnt32HyjbzZ27Wn80SgdsGN3R uuneTZ4Ao+hWmekLtNItUCmWJTaloCYJL9MmE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=Q6BSRurhLMQkfcWq5OJAf1CntoIc8amS1dBRFgg+9Sg=; b=4cHuUp1ltZbffH0f3K9NnkY45p0j23wlENsqdTzCRQiyu0zneccPngQploLQ8Pd6wR yXPZ586qcHOuzn6j5JI2PBzk76Q+rPpN/cZ8fGJS0cF6N4uaVRQsT/WBbQgzatfiIq0N TP2eUlI6lojOZZm72XF2N33IYVRhlnx7zmoIh9VGRto5tVRSPGqsSZNzsPTcm13MKqDI qj2wpYYoh0rZeEpxdmHxkRrMyGJ64CbCk9W3Hrny8mGtGq5mxDx+Mc+e3+aM80/TQ67p 3ediTx9h6FHDNYaC3O7R7kgSHDwxwzNKygKAdP8g68glx2Lzb7gzhQUuZ9bwdAax4ECH vJsA== X-Gm-Message-State: AOAM530zu8sNL56kSTPC8KF6jrOOS/tbX/iLiikKcRVLsGsh+Y8Y03zb 31Ug73cCfJSw277A1x4uT/W+tNN8nBLZWQ== X-Google-Smtp-Source: ABdhPJzk88jlHk+5AaIR4P21V3AFeYaCVcZWUqavFbtGyTxI0Wk/4ceP82jUrDT0kE8PpZu/rTOcIg== X-Received: by 2002:a17:906:5641:b0:6da:8691:3fcc with SMTP id v1-20020a170906564100b006da86913fccmr667783ejr.50.1648661124645; Wed, 30 Mar 2022 10:25:24 -0700 (PDT) Received: from localhost ([2620:10d:c093:400::5:c1bb]) by smtp.gmail.com with ESMTPSA id gt34-20020a1709072da200b006df6bb3db69sm8516565ejc.158.2022.03.30.10.25.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Mar 2022 10:25:24 -0700 (PDT) Date: Wed, 30 Mar 2022 18:25:23 +0100 From: Chris Down To: Steven Rostedt Cc: Dave Chinner , Petr Mladek , Jonathan Lassoff , linux-xfs@vger.kernel.org, "Darrick J. Wong" , Sergey Senozhatsky , John Ogness Subject: Re: [PATCH v3 2/2] Add XFS messages to printk index Message-ID: References: <3e1f6011b22ca87ea3c0fad701286369daa2187f.1648228733.git.jof@thejof.com> <3c3ae424913cb921a9f8abddfcb1b418e7cfa601.1648228733.git.jof@thejof.com> <20220330003457.GB1544202@dread.disaster.area> <20220330124739.70edca36@gandalf.local.home> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: User-Agent: Mutt/2.2.2 (aa28abe8) (2022-03-25) Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org Chris Down writes: >>That article you reference states the opposite of what you said. And I got >>burnt by it before. Because Linus stated, if it is available for users, it >>is an ABI. > >Hmm, even in 2011 after that article there were discussions about >debugfs explicitly being the "wild west"[0], no? I heard the same >during LSFMM discussions during recent years as well. Although I >confess that I am not frequently in discussions about debugfs so I >don't really know where the majority opinion is nowadays. > >Either way, as discussed the contents wouldn't be the ABI (as with my >/proc/self/smaps allusion), the file format would be, so it wouldn't >imply that printk() calls themselves or their locations become an ABI. > >0: https://lwn.net/Articles/429321/ (To be clear, that article basically says that debugfs should become less of a "wild west", of course. I mostly just am not sure that it's so clear to everyone what the ABI status of debugfs currently is, although probably your recent experience with Linus is a reasonable thermometer on the whole thing.)