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=-3.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 D2BB1C4338F for ; Fri, 20 Aug 2021 22:35:28 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 5A98B610A3 for ; Fri, 20 Aug 2021 22:35:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 5A98B610A3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 8A4AB8D0001; Fri, 20 Aug 2021 18:35:27 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 8547A6B0072; Fri, 20 Aug 2021 18:35:27 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6F5D58D0001; Fri, 20 Aug 2021 18:35:27 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0083.hostedemail.com [216.40.44.83]) by kanga.kvack.org (Postfix) with ESMTP id 5429A6B0071 for ; Fri, 20 Aug 2021 18:35:27 -0400 (EDT) Received: from smtpin04.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id EC90B27715 for ; Fri, 20 Aug 2021 22:35:26 +0000 (UTC) X-FDA: 78496916652.04.23584FA Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf29.hostedemail.com (Postfix) with ESMTP id 7E3889000094 for ; Fri, 20 Aug 2021 22:35:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=Rqd7XZjlI+nNgy4uwpEVUNLUjFWyJ9EMV7pUgmSDTMM=; b=ScMaiyryPuwarKlOD4teq+Ru/Q wv7TrfDsI7YN5IkHpuXdP0Wz99OxXtNoibwbOYSZbJ7N/oL+yem9/3XsoJyK2D+YWGJrCnnYQvm2h qV30W6G8LNquDniLNXz/nRBs3Z1mAmvdDTgC3MNIppohKZUExmN+apIfxJLHksWCOa67p9+1GwAuh f5FvMDA9G9rWZohHRQWV2w5pTT+FyUrnAdFCPsE/FSuCVG8+VoKxMjs+4JrS//xNOW5rk5cS4DPj4 aS2Ets2iO3kIAh6Tftnn5hacmQmzeoMaQKS211gaqDIdFYqQE6lpkb8D8CRtzCNTSla6apcYpJdV8 SrI9ABTQ==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1mHD2X-0073QU-D1; Fri, 20 Aug 2021 22:31:21 +0000 Date: Fri, 20 Aug 2021 23:31:05 +0100 From: Matthew Wilcox To: "H. Peter Anvin" Cc: Kees Cook , Linus Torvalds , Jeff Layton , "Eric W. Biederman" , 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 , Christian =?iso-8859-1?Q?K=F6nig?= , "linux-unionfs@vger.kernel.org" , Linux API , the arch/x86 maintainers , "" , Linux-MM , Florian Weimer , Michael Kerrisk Subject: Re: Removing Mandatory Locks Message-ID: References: <5b0d7c1e73ca43ef9ce6665fec6c4d7e@AcuMS.aculab.com> <87h7ft2j68.fsf@disp2133> <87k0kkxbjn.fsf_-_@disp2133> <0c2af732e4e9f74c9d20b09fc4b6cbae40351085.camel@kernel.org> <202108200905.BE8AF7C@keescook> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: 7E3889000094 Authentication-Results: imf29.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=ScMaiyry; dmarc=none; spf=none (imf29.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org X-Rspamd-Server: rspam01 X-Stat-Signature: bjbqew9wthkqtxqbhaiwyk636trqkeea X-HE-Tag: 1629498926-440851 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 Fri, Aug 20, 2021 at 12:17:49PM -0700, H. Peter Anvin wrote: > I thought the main user was Samba and/or otherwise providing file service for M$ systems? When I asked around about this in ~2001, the only example anyoe was able to come up with was some database that I no longer remember the name of.