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 853ADC4338F for ; Fri, 20 Aug 2021 19:19:52 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id EF51261130 for ; Fri, 20 Aug 2021 19:19:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org EF51261130 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=zytor.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 7AE078D0001; Fri, 20 Aug 2021 15:19:51 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 7377E6B0072; Fri, 20 Aug 2021 15:19:51 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5B04E8D0001; Fri, 20 Aug 2021 15:19:51 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0042.hostedemail.com [216.40.44.42]) by kanga.kvack.org (Postfix) with ESMTP id 3DFF66B0071 for ; Fri, 20 Aug 2021 15:19:51 -0400 (EDT) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id DAF2182EDA7D for ; Fri, 20 Aug 2021 19:19:50 +0000 (UTC) X-FDA: 78496423740.30.6E90BAA Received: from mail.zytor.com (terminus.zytor.com [198.137.202.136]) by imf29.hostedemail.com (Postfix) with ESMTP id 860C59000257 for ; Fri, 20 Aug 2021 19:19:50 +0000 (UTC) Received: from [IPv6:::1] ([IPv6:2601:646:8600:3c71:6111:82d6:dfad:778c]) (authenticated bits=0) by mail.zytor.com (8.16.1/8.15.2) with ESMTPSA id 17KJHuYd937846 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NO); Fri, 20 Aug 2021 12:17:56 -0700 DKIM-Filter: OpenDKIM Filter v2.11.0 mail.zytor.com 17KJHuYd937846 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zytor.com; s=2021073001; t=1629487085; bh=Swjddd6h78nIFLV61ZIUR3LeMVGCy8t3nFizFuvLjOo=; h=Date:From:To:CC:Subject:In-Reply-To:References:From; b=KscL6G2l89RQDkEtrhzSWjkvZrFHDi+mzgdzo/IbbPwLq6hNBd/OSU8dL1PWFV2XB wW+VbG4+sezrIAFCFB8T+pmg6Yfqoj7N7eBkkAi2dUC3C8vdIwop4fIXcbDs3wMfpG f0B3USGu38WtkjiXeVwFomXyjKRnp5IO2zD5dCWSTRgpWS1BQ7x4EK1amPlOfx2g2R 39Seo/9NcBLHhjPLJQzAbvNgCgsmAdvLK7fdWXaH+KOi+8B2NwpUmMMK6zBO0r0g1q 3H9W2Tx23mLp1AzBXvSadlivUk+lpgzSKZM/SmBCIRGLfdCFgs6awRKUKsF4ER/6mk MZM0sEf8tTcrw== Date: Fri, 20 Aug 2021 12:17:49 -0700 From: "H. Peter Anvin" To: Kees Cook , Linus Torvalds CC: Jeff Layton , "Eric W. Biederman" , Matthew Wilcox , Andy Lutomirski , David Laight , David Hildenbrand , Linux Kernel Mailing List , Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , 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 , 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 , =?ISO-8859-1?Q?Christian_K=F6nig?= , "linux-unionfs@vger.kernel.org" , Linux API , the arch/x86 maintainers , "" , Linux-MM , Florian Weimer , Michael Kerrisk Subject: Re: Removing Mandatory Locks User-Agent: K-9 Mail for Android In-Reply-To: <202108200905.BE8AF7C@keescook> References: <87eeay8pqx.fsf@disp2133> <5b0d7c1e73ca43ef9ce6665fec6c4d7e@AcuMS.aculab.com> <87h7ft2j68.fsf@disp2133> <87k0kkxbjn.fsf_-_@disp2133> <0c2af732e4e9f74c9d20b09fc4b6cbae40351085.camel@kernel.org> <202108200905.BE8AF7C@keescook> Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Authentication-Results: imf29.hostedemail.com; dkim=pass header.d=zytor.com header.s=2021073001 header.b=KscL6G2l; dmarc=pass (policy=none) header.from=zytor.com; spf=pass (imf29.hostedemail.com: domain of hpa@zytor.com designates 198.137.202.136 as permitted sender) smtp.mailfrom=hpa@zytor.com X-Stat-Signature: nudqpus7iccf5xkfntwi33ydjffx17ji X-Rspamd-Queue-Id: 860C59000257 X-Rspamd-Server: rspam05 X-HE-Tag: 1629487190-922552 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: I thought the main user was Samba and/or otherwise providing file service f= or M$ systems? On August 20, 2021 9:30:31 AM PDT, Kees Cook wro= te: >On Thu, Aug 19, 2021 at 12:15:08PM -0700, Linus Torvalds wrote: >> On Thu, Aug 19, 2021 at 11:39 AM Jeff Layton wro= te: >> > >> > I'm all for ripping it out too=2E It's an insane interface anyway=2E >> > >> > I've not heard a single complaint about this being turned off in >> > fedora/rhel or any other distro that has this disabled=2E >>=20 >> I'd love to remove it, we could absolutely test it=2E The fact that >> several major distros have it disabled makes me think it's fine=2E > >FWIW, it is now disabled in Ubuntu too: > >https://git=2Elaunchpad=2Enet/~ubuntu-kernel/ubuntu/+source/linux/+git/im= pish/commit/?h=3Dmaster-next&id=3Df3aac5e47789cbeb3177a14d3d2a06575249e14b > >> But as always, it would be good to check Android=2E > >It looks like it's enabled (checking the Pixel 4 kernel image), but it's >not specifically mentioned in any of the build configs that are used to >construct the image, so I think this is just catching the "default y"=2E = I >expect it'd be fine to turn this off=2E > >I will ask around to see if it's actually used=2E > --=20 Sent from my Android device with K-9 Mail=2E Please excuse my brevity=2E