linux-kernel - Re: Removing Mandatory Locks

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Message-ID: <YSAtKesNFlSIhHar@casper.infradead.org>
Date:   Fri, 20 Aug 2021 23:31:05 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     "H. Peter Anvin" <hpa@...or.com>
Cc:     Kees Cook <keescook@...omium.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Jeff Layton <jlayton@...nel.org>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Andy Lutomirski <luto@...nel.org>,
        David Laight <David.Laight@...lab.com>,
        David Hildenbrand <david@...hat.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Al Viro <viro@...iv.linux.org.uk>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
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        Namhyung Kim <namhyung@...nel.org>,
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        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
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        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Greg Ungerer <gerg@...ux-m68k.org>,
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        Mike Rapoport <rppt@...nel.org>,
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        Catalin Marinas <catalin.marinas@....com>,
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        Michael Ellerman <mpe@...erman.id.au>,
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        Christian Brauner <christian.brauner@...ntu.com>,
        Jens Axboe <axboe@...nel.dk>,
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        Peter Xu <peterx@...hat.com>,
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        Shakeel Butt <shakeelb@...gle.com>,
        Marco Elver <elver@...gle.com>,
        Daniel Jordan <daniel.m.jordan@...cle.com>,
        Nicolas Viennot <Nicolas.Viennot@...sigma.com>,
        Thomas Cedeno <thomascedeno@...gle.com>,
        Collin Fijalkovich <cfijalkovich@...gle.com>,
        Michal Hocko <mhocko@...e.com>,
        Miklos Szeredi <miklos@...redi.hu>,
        Chengguang Xu <cgxu519@...ernel.net>,
        Christian König 
        <ckoenig.leichtzumerken@...il.com>,
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        Linux API <linux-api@...r.kernel.org>,
        the arch/x86 maintainers <x86@...nel.org>,
        "<linux-fsdevel@...r.kernel.org>" <linux-fsdevel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>,
        Florian Weimer <fweimer@...hat.com>,
        Michael Kerrisk <mtk.manpages@...il.com>
Subject: Re: Removing Mandatory Locks

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.