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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 E618CC4338F for ; Wed, 18 Aug 2021 09:35:05 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 66ABE60462 for ; Wed, 18 Aug 2021 09:35:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 66ABE60462 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kinvolk.io Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id D726D6B006C; Wed, 18 Aug 2021 05:35:04 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id CFADF6B0072; Wed, 18 Aug 2021 05:35:04 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B9C1F8D0001; Wed, 18 Aug 2021 05:35:04 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0068.hostedemail.com [216.40.44.68]) by kanga.kvack.org (Postfix) with ESMTP id 9C3C46B006C for ; Wed, 18 Aug 2021 05:35:04 -0400 (EDT) Received: from smtpin01.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 4B797824999B for ; Wed, 18 Aug 2021 09:35:04 +0000 (UTC) X-FDA: 78487692528.01.0F5C2B6 Received: from mail-lf1-f49.google.com (mail-lf1-f49.google.com [209.85.167.49]) by imf07.hostedemail.com (Postfix) with ESMTP id 0BAA010037D4 for ; Wed, 18 Aug 2021 09:35:03 +0000 (UTC) Received: by mail-lf1-f49.google.com with SMTP id r9so3341869lfn.3 for ; Wed, 18 Aug 2021 02:35:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kinvolk.io; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=oiHvib23/P491CLaRgXvFmChy35OD4Cm4iT1dt+Oh64=; b=ZEXrzZn8yIRrwRBAbkQqjyDUM1Y1ntGz22UCVGWj4pa8ds9y1rSNm13RRW2Zbu1ewG rBn6QqJmL0FXQmDfsvP4crAiRZoezMZEvTCPpEdS1lWr+KIwFbDoQFfLqsbyi+aIyMn3 2cpqNcKCR2xP4oZ+5okAnYjRgAPhb7/oHmHRo= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=oiHvib23/P491CLaRgXvFmChy35OD4Cm4iT1dt+Oh64=; b=mTOnMn9sbjK000pASEx37ozUyYbbmqXtnkq1m9Cz7DV2zSYMDw4lAzdUkw2lfbjR9I Kp838DZ5Fu7u3I5EQT+KxkzBA/s2gGRiTMBW7DWCw8nSj/Y/WerOR8QfeGo/XoSNCAWh Dv59kKfnfDY9ZcQJmdW8UmL+nf1FIlPXZmVMGJqhVF4Zs46ffWOYjIcVDQdakyLwzDWd M9UsXxBS8ng3jIpakUlHhStb8H20L9zxSdsLh0pkLv3vgyfwUx5dg+aJRX42RZx87LyH j00lXCqOZc+eQWrTeSyVNhvK2JF3BM1Rmu5nP68PltYeIg82RpoCb/TZfJbBOflOjeXf Lmaw== X-Gm-Message-State: AOAM533eu617A1juHFNGmvxcbW9ellIAxRyaiabEigyZZHeqXhEoc0SM nEwDrlKCkeM2MVtXTUjhij/Agomyv/ElIOooCsATZw== X-Google-Smtp-Source: ABdhPJwoXvjX95NQrkUEtTh9/QSK0DDOWwz14GzEQTgLURMiW93dA3wt3YYyRzKwajrJJxceQBuTcuJDyIYDiI2xWhI= X-Received: by 2002:a05:6512:952:: with SMTP id u18mr3991386lft.288.1629279302276; Wed, 18 Aug 2021 02:35:02 -0700 (PDT) MIME-Version: 1.0 References: <20210812084348.6521-1-david@redhat.com> <87o8a2d0wf.fsf@disp2133> <60db2e61-6b00-44fa-b718-e4361fcc238c@www.fastmail.com> <87lf56bllc.fsf@disp2133> <87eeay8pqx.fsf@disp2133> <5b0d7c1e73ca43ef9ce6665fec6c4d7e@AcuMS.aculab.com> <87h7ft2j68.fsf@disp2133> <87k0kkxbjn.fsf_-_@disp2133> In-Reply-To: <87k0kkxbjn.fsf_-_@disp2133> From: Rodrigo Campos Date: Wed, 18 Aug 2021 11:34:26 +0200 Message-ID: Subject: Re: Removing Mandatory Locks To: "Eric W. Biederman" Cc: Matthew Wilcox , Andy Lutomirski , Linus Torvalds , David Laight , David Hildenbrand , Linux Kernel Mailing List , Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Al Viro , Alexey Dobriyan , Steven Rostedt , "Peter Zijlstra (Intel)" , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Petr Mladek , Sergey Senozhatsky , Andy Shevchenko , Rasmus Villemoes , Kees Cook , Greg Ungerer , Geert Uytterhoeven , Mike Rapoport , Vlastimil Babka , Vincenzo Frascino , Chinwen Chang , Michel Lespinasse , Catalin Marinas , Huang Ying , Jann Horn , Feng Tang , Kevin Brodsky , Michael Ellerman , Shawn Anastasio , Steven Price , Nicholas Piggin , Christian Brauner , Jens Axboe , Gabriel Krisman Bertazi , Peter Xu , Suren Baghdasaryan , Shakeel Butt , Marco Elver , Daniel Jordan , Nicolas Viennot , Thomas Cedeno , Collin Fijalkovich , Michal Hocko , Miklos Szeredi , Chengguang Xu , =?UTF-8?Q?Christian_K=C3=B6nig?= , "linux-unionfs@vger.kernel.org" , Linux API , "the arch/x86 maintainers" , "" , Linux-MM , Florian Weimer , Michael Kerrisk Content-Type: text/plain; charset="UTF-8" Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=kinvolk.io header.s=google header.b=ZEXrzZn8; dmarc=pass (policy=none) header.from=kinvolk.io; spf=pass (imf07.hostedemail.com: domain of rodrigo@kinvolk.io designates 209.85.167.49 as permitted sender) smtp.mailfrom=rodrigo@kinvolk.io X-Stat-Signature: ekej4btp766goxhfbzrr81wjn3rt5cw4 X-Rspamd-Queue-Id: 0BAA010037D4 X-Rspamd-Server: rspam05 X-HE-Tag: 1629279303-570242 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Aug 17, 2021 at 6:49 PM Eric W. Biederman wrote: > > Matthew Wilcox writes: > > > On Fri, Aug 13, 2021 at 05:49:19PM -0700, Andy Lutomirski wrote: > >> [0] we have mandatory locks, too. Sigh. > > > > I'd love to remove that. Perhaps we could try persuading more of the > > distros to disable the CONFIG option first. > > Yes. The support is disabled in RHEL8. If it helps, it seems to be enabled on the just released debian stable: $ grep CONFIG_MANDATORY_FILE_LOCKING /boot/config-5.10.0-8-amd64 CONFIG_MANDATORY_FILE_LOCKING=y Also the new 5.13 kernel in experimental has it too: $ grep CONFIG_MANDATORY_FILE_LOCKING /boot/config-5.13.0-trunk-amd64 CONFIG_MANDATORY_FILE_LOCKING=y