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=-5.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 CF26AC4708A for ; Thu, 27 May 2021 14:19:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AB275613E6 for ; Thu, 27 May 2021 14:19:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236466AbhE0OVE (ORCPT ); Thu, 27 May 2021 10:21:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46592 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236404AbhE0OVB (ORCPT ); Thu, 27 May 2021 10:21:01 -0400 Received: from mail-oo1-xc36.google.com (mail-oo1-xc36.google.com [IPv6:2607:f8b0:4864:20::c36]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9949AC061760 for ; Thu, 27 May 2021 07:19:27 -0700 (PDT) Received: by mail-oo1-xc36.google.com with SMTP id o14-20020a4a384e0000b029020ec48a2358so137430oof.13 for ; Thu, 27 May 2021 07:19:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=XHKwLF2v3V4VWqYx9n7FC4fqjL2IydPIckhglGl3aBI=; b=vdx889mKtXxmmUtYyUT/xQmX2vtJuYXBCeuf1weEQ4rWMaorY2PhYVEtNtnp13g5fJ ak1m+/QKXN7O0xTFFlIBo28Txs/zXK44Pkt/G62rSiLnrRjlh+bHWwGk9lV3F6r14Jht JL6Dw6ojRKGoCHZThCY0GBNH88sF+lS9vBbEkO22eXqDMHxfiZoW9h7LIjyR7gThSp+8 QbO4S2wB4T8rrS8yEblcB9WA9pH5TseuavX5SKL2vlOTP19XqjYQ0lRlZ2W2vjgcORP+ sUbL1C4+nuCaBdu+Bd103z3tYu5YEj6sF6riCfXvBKvz9kJVajuUjEVO4YADZ46yfyVM iG0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=XHKwLF2v3V4VWqYx9n7FC4fqjL2IydPIckhglGl3aBI=; b=byTf+0ItEY4789sWbWgxkLGF7SjeYWxtAbSgwAtwXMrojFj8BwJ5x8CX8dAtrXirO8 PBuwV52yFl4qYjxQrJGZc5vCj/2XQC4zZAPipJuH5IaFOfknSW1LjbD1CUDT8YzQO/NO VQMRslZGr+1Fp+hdWPUlENFONnTmZIqh4KQYASpXkVd80k/CaruaguFelp+Jv23+KG6d VAoleYQK3dC7svvw9AJGX5aNAIWqZm5JZ1D17FYsGTkL1VoOpps/ocnenvYlTmIiCBoL CkiBX8XbLYGAYA/j5OXNxyY52Om2a8nfqU/FixsCdpYWNLRrrqxcDUQnU/HwUiD8QsgU P4wg== X-Gm-Message-State: AOAM531zUpBdB2jXLFH0uALb4NfICM6KCU7kv7UgGSoFTyHcTBUe136G F/ZEUCl/HyedblbAjmvMWo2+lIBekipihA== X-Google-Smtp-Source: ABdhPJyOUhN3gC5sEntgg5uHfW405nngphDn5/C6msJmpeXMMhBJ2hA/axxrhd+5wNLER1eaSw8FLg== X-Received: by 2002:a4a:b085:: with SMTP id k5mr3021821oon.20.1622125166561; Thu, 27 May 2021 07:19:26 -0700 (PDT) Received: from [192.168.1.30] ([207.135.233.147]) by smtp.gmail.com with ESMTPSA id m1sm507110otq.12.2021.05.27.07.19.25 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 27 May 2021 07:19:26 -0700 (PDT) Subject: Re: [PATCH] io_uring: Remove CONFIG_EXPERT To: Justin Forbes Cc: asml.silence@gmail.com, io-uring@vger.kernel.org, Linux Kernel Mailing List References: <20210526223445.317749-1-jforbes@fedoraproject.org> From: Jens Axboe Message-ID: <01c2a63f-23f6-2228-264d-6f3e581e647d@kernel.dk> Date: Thu, 27 May 2021 08:19:25 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/27/21 8:12 AM, Justin Forbes wrote: > On Thu, May 27, 2021 at 8:43 AM Jens Axboe wrote: >> >> On 5/26/21 4:34 PM, Justin M. Forbes wrote: >>> While IO_URING has been in fairly heavy development, it is hidden behind >>> CONFIG_EXPERT with a default of on. It has been long enough now that I >>> think we should remove EXPERT and allow users and distros to decide how >>> they want this config option set without jumping through hoops. >> >> The whole point of EXPERT is to ensure that it doesn't get turned off >> "by accident". It's a core feature, and something that more and more >> apps or libraries are relying on. It's not something I intended to ever >> go away, just like it would never go away for eg futex or epoll support. >> > > I am not arguing with that, I don't expect it will go away. I > certainly do not have an issue with it defaulting to on, and I didn't > even submit this with intention to turn it off for default Fedora. I > do think that there are cases where people might not wish it turned on > at this point in time. Hiding it behind EXPERT makes it much more > difficult than it needs to be. There are plenty of config options > that are largely expected default and not hidden behind EXPERT. Right there are, but not really core kernel features like the ones I mentioned. Hence my argument for why it's correct as-is and I don't think it should be changed. -- Jens Axboe