Re: [PATCH v1 0/7] Remove in-tree usage of MAP_DENYWRITE

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To: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Subject: Re: [PATCH v1 0/7] Remove in-tree usage of MAP_DENYWRITE
From: Christian Brauner <christian.brauner@xxxxxxxxxx>
Date: Wed, 18 Aug 2021 09:51:15 +0200
Cc: Andy Lutomirski <luto@xxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>, David Laight <David.Laight@xxxxxxxxxx>, David Hildenbrand <david@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Al Viro <viro@xxxxxxxxxxxxxxxxxx>, Alexey Dobriyan <adobriyan@xxxxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, "Peter Zijlstra (Intel)" <peterz@xxxxxxxxxxxxx>, Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>, Mark Rutland <mark.rutland@xxxxxxx>, Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>, Jiri Olsa <jolsa@xxxxxxxxxx>, Namhyung Kim <namhyung@xxxxxxxxxx>, Petr Mladek <pmladek@xxxxxxxx>, Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>, Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>, Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, Greg Ungerer <gerg@xxxxxxxxxxxxxx>, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>, Mike Rapoport <rppt@xxxxxxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, Vincenzo Frascino <vincenzo.frascino@xxxxxxx>, Chinwen Chang <chinwen.chang@xxxxxxxxxxxx>, Michel Lespinasse <walken@xxxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Huang Ying <ying.huang@xxxxxxxxx>, Jann Horn <jannh@xxxxxxxxxx>, Feng Tang <feng.tang@xxxxxxxxx>, Kevin Brodsky <Kevin.Brodsky@xxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Shawn Anastasio <shawn@xxxxxxxxxx>, Steven Price <steven.price@xxxxxxx>, Nicholas Piggin <npiggin@xxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx>, Peter Xu <peterx@xxxxxxxxxx>, Suren Baghdasaryan <surenb@xxxxxxxxxx>, Shakeel Butt <shakeelb@xxxxxxxxxx>, Marco Elver <elver@xxxxxxxxxx>, Daniel Jordan <daniel.m.jordan@xxxxxxxxxx>, Nicolas Viennot <Nicolas.Viennot@xxxxxxxxxxxx>, Thomas Cedeno <thomascedeno@xxxxxxxxxx>, Collin Fijalkovich <cfijalkovich@xxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxx>, Miklos Szeredi <miklos@xxxxxxxxxx>, Chengguang Xu <cgxu519@xxxxxxxxxxxx>, Christian König <ckoenig.leichtzumerken@xxxxxxxxx>, "linux-unionfs@xxxxxxxxxxxxxxx" <linux-unionfs@xxxxxxxxxxxxxxx>, Linux API <linux-api@xxxxxxxxxxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, "<linux-fsdevel@xxxxxxxxxxxxxxx>" <linux-fsdevel@xxxxxxxxxxxxxxx>, Linux-MM <linux-mm@xxxxxxxxx>, Florian Weimer <fweimer@xxxxxxxxxx>, Michael Kerrisk <mtk.manpages@xxxxxxxxx>
In-reply-to: <YRcyqbpVqwwq3P6n@casper.infradead.org>
References: <87o8a2d0wf.fsf@disp2133> <60db2e61-6b00-44fa-b718-e4361fcc238c@www.fastmail.com> <87lf56bllc.fsf@disp2133> <CAHk-=wgru1UAm3kAKSOdnbewPXQMOxYkq9PnAsRadAC6pXCCMQ@mail.gmail.com> <87eeay8pqx.fsf@disp2133> <5b0d7c1e73ca43ef9ce6665fec6c4d7e@AcuMS.aculab.com> <87h7ft2j68.fsf@disp2133> <CAHk-=whmXTiGUzVrTP=mOPQrg-XOi3R-45hC4dQOqW4JmZdFUQ@mail.gmail.com> <b629cda1-becd-4725-b16c-13208ff478d3@www.fastmail.com> <YRcyqbpVqwwq3P6n@casper.infradead.org>

On Sat, Aug 14, 2021 at 04:04:09AM +0100, Matthew Wilcox wrote:
> 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.

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1940392

References:
- Re: [PATCH v1 0/7] Remove in-tree usage of MAP_DENYWRITE
  - From: Eric W. Biederman
- Re: [PATCH v1 0/7] Remove in-tree usage of MAP_DENYWRITE
  - From: Andy Lutomirski
- Re: [PATCH v1 0/7] Remove in-tree usage of MAP_DENYWRITE
  - From: Eric W. Biederman
- Re: [PATCH v1 0/7] Remove in-tree usage of MAP_DENYWRITE
  - From: Linus Torvalds
- Re: [PATCH v1 0/7] Remove in-tree usage of MAP_DENYWRITE
  - From: Eric W. Biederman
- RE: [PATCH v1 0/7] Remove in-tree usage of MAP_DENYWRITE
  - From: David Laight
- Re: [PATCH v1 0/7] Remove in-tree usage of MAP_DENYWRITE
  - From: Eric W. Biederman
- Re: [PATCH v1 0/7] Remove in-tree usage of MAP_DENYWRITE
  - From: Linus Torvalds
- Re: [PATCH v1 0/7] Remove in-tree usage of MAP_DENYWRITE
  - From: Andy Lutomirski
- Re: [PATCH v1 0/7] Remove in-tree usage of MAP_DENYWRITE
  - From: Matthew Wilcox

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