All of lore.kernel.org
 help / color / mirror / Atom feed
From: Linus Torvalds <torvalds@linux-foundation.org>
To: Jeff Layton <jlayton@kernel.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
	"Matthew Wilcox" <willy@infradead.org>,
	"Andy Lutomirski" <luto@kernel.org>,
	"David Laight" <David.Laight@aculab.com>,
	"David Hildenbrand" <david@redhat.com>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Ingo Molnar" <mingo@redhat.com>,
	"Borislav Petkov" <bp@alien8.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	"Al Viro" <viro@zeniv.linux.org.uk>,
	"Alexey Dobriyan" <adobriyan@gmail.com>,
	"Steven Rostedt" <rostedt@goodmis.org>,
	"Peter Zijlstra (Intel)" <peterz@infradead.org>,
	"Arnaldo Carvalho de Melo" <acme@kernel.org>,
	"Mark Rutland" <mark.rutland@arm.com>,
	"Alexander Shishkin" <alexander.shishkin@linux.intel.com>,
	"Jiri Olsa" <jolsa@redhat.com>,
	"Namhyung Kim" <namhyung@kernel.org>,
	"Petr Mladek" <pmladek@suse.com>,
	"Sergey Senozhatsky" <sergey.senozhatsky@gmail.com>,
	"Andy Shevchenko" <andriy.shevchenko@linux.intel.com>,
	"Rasmus Villemoes" <linux@rasmusvillemoes.dk>,
	"Kees Cook" <keescook@chromium.org>,
	"Greg Ungerer" <gerg@linux-m68k.org>,
	"Geert Uytterhoeven" <geert@linux-m68k.org>,
	"Mike Rapoport" <rppt@kernel.org>,
	"Vlastimil Babka" <vbabka@suse.cz>,
	"Vincenzo Frascino" <vincenzo.frascino@arm.com>,
	"Chinwen Chang" <chinwen.chang@mediatek.com>,
	"Michel Lespinasse" <walken@google.com>,
	"Catalin Marinas" <catalin.marinas@arm.com>,
	"Huang Ying" <ying.huang@intel.com>,
	"Jann Horn" <jannh@google.com>, "Feng Tang" <feng.tang@intel.com>,
	"Kevin Brodsky" <Kevin.Brodsky@arm.com>,
	"Michael Ellerman" <mpe@ellerman.id.au>,
	"Shawn Anastasio" <shawn@anastas.io>,
	"Steven Price" <steven.price@arm.com>,
	"Nicholas Piggin" <npiggin@gmail.com>,
	"Christian Brauner" <christian.brauner@ubuntu.com>,
	"Jens Axboe" <axboe@kernel.dk>,
	"Gabriel Krisman Bertazi" <krisman@collabora.com>,
	"Peter Xu" <peterx@redhat.com>,
	"Suren Baghdasaryan" <surenb@google.com>,
	"Shakeel Butt" <shakeelb@google.com>,
	"Marco Elver" <elver@google.com>,
	"Daniel Jordan" <daniel.m.jordan@oracle.com>,
	"Nicolas Viennot" <Nicolas.Viennot@twosigma.com>,
	"Thomas Cedeno" <thomascedeno@google.com>,
	"Collin Fijalkovich" <cfijalkovich@google.com>,
	"Michal Hocko" <mhocko@suse.com>,
	"Miklos Szeredi" <miklos@szeredi.hu>,
	"Chengguang Xu" <cgxu519@mykernel.net>,
	"Christian König" <ckoenig.leichtzumerken@gmail.com>,
	"linux-unionfs@vger.kernel.org" <linux-unionfs@vger.kernel.org>,
	"Linux API" <linux-api@vger.kernel.org>,
	"the arch/x86 maintainers" <x86@kernel.org>,
	"<linux-fsdevel@vger.kernel.org>" <linux-fsdevel@vger.kernel.org>,
	Linux-MM <linux-mm@kvack.org>,
	"Florian Weimer" <fweimer@redhat.com>,
	"Michael Kerrisk" <mtk.manpages@gmail.com>
Subject: Re: Removing Mandatory Locks
Date: Thu, 19 Aug 2021 15:32:31 -0700	[thread overview]
Message-ID: <CAHk-=wgHbYmUZvFkthGJ6zZx+ofTiiTRxPai5mPkmbtE=6JbaQ@mail.gmail.com> (raw)
In-Reply-To: <639d90212662cf5cdf80c71bbfec95907c70114a.camel@kernel.org>

On Thu, Aug 19, 2021 at 2:43 PM Jeff Layton <jlayton@kernel.org> wrote:
>
> What sort of big, ugly warning did you have in mind?

I originally thought WARN_ON_ONCE() just to get the distro automatic
error handling involved, but it would probably be a big problem for
the people who end up having panic-on-warn or something.

So probably just a "make it a big box" thing that stands out, kind of
what lockdep etc does with

        pr_warn("======...====\n");

around the messages..

I don't know if distros have some pattern we could use that would end
up being something that gets reported to the user?

              Linus

  reply	other threads:[~2021-08-19 22:33 UTC|newest]

Thread overview: 86+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-12  8:43 [PATCH v1 0/7] Remove in-tree usage of MAP_DENYWRITE David Hildenbrand
2021-08-12  8:43 ` [PATCH v1 1/7] binfmt: don't use MAP_DENYWRITE when loading shared libraries via uselib() David Hildenbrand
2021-08-12  8:43 ` [PATCH v1 2/7] kernel/fork: factor out atomcially replacing the current MM exe_file David Hildenbrand
2021-08-12  9:17   ` Christian Brauner
2021-08-12  8:43 ` [PATCH v1 3/7] kernel/fork: always deny write access to " David Hildenbrand
2021-08-12 10:05   ` Christian Brauner
2021-08-12 10:13     ` David Hildenbrand
2021-08-12 12:32       ` Christian Brauner
2021-08-12 12:38         ` David Hildenbrand
2021-08-12 16:51   ` Linus Torvalds
2021-08-12 19:38     ` David Hildenbrand
2021-08-12  8:43 ` [PATCH v1 4/7] binfmt: remove in-tree usage of MAP_DENYWRITE David Hildenbrand
2021-08-12  8:43 ` [PATCH v1 5/7] mm: remove VM_DENYWRITE David Hildenbrand
2021-08-12  8:43 ` [PATCH v1 6/7] mm: ignore MAP_DENYWRITE in ksys_mmap_pgoff() David Hildenbrand
2021-08-12  8:43 ` [PATCH v1 7/7] fs: update documentation of get_write_access() and friends David Hildenbrand
2021-08-12 12:20 ` [PATCH v1 0/7] Remove in-tree usage of MAP_DENYWRITE Florian Weimer
2021-08-12 12:47   ` David Hildenbrand
2021-08-12 16:17   ` Eric W. Biederman
2021-08-12 17:32 ` Eric W. Biederman
2021-08-12 17:35   ` Andy Lutomirski
2021-08-12 17:48     ` Eric W. Biederman
2021-08-12 18:01       ` Andy Lutomirski
2021-08-12 18:10       ` Linus Torvalds
2021-08-12 18:47         ` Eric W. Biederman
2021-08-13  9:05           ` David Laight
2021-08-13 20:17             ` Eric W. Biederman
2021-08-13 20:51               ` Florian Weimer
2021-08-14  0:31               ` Linus Torvalds
2021-08-14  0:49                 ` Andy Lutomirski
2021-08-14  0:54                   ` Linus Torvalds
2021-08-14  0:58                     ` Linus Torvalds
2021-08-14  1:57                       ` Al Viro
2021-08-14  2:02                         ` Al Viro
2021-08-14  9:06                           ` David Hildenbrand
2021-08-14  7:53                         ` Christian Brauner
2021-08-14 19:52                     ` David Laight
2021-08-26 17:48                     ` Andy Lutomirski
2021-08-26 21:47                       ` David Hildenbrand
2021-08-26 22:13                         ` Eric W. Biederman
2021-08-27  8:22                           ` David Laight
2021-08-27 15:58                             ` Eric W. Biederman
2021-09-01  8:28                           ` David Hildenbrand
2021-08-27 10:18                         ` Christian Brauner
2021-08-14  3:04                   ` Matthew Wilcox
2021-08-17 16:48                     ` Removing Mandatory Locks Eric W. Biederman
2021-08-17 16:50                       ` David Hildenbrand
2021-08-18  9:34                       ` Rodrigo Campos
2021-08-19 19:18                         ` Jeff Layton
2021-08-19 20:03                           ` Willy Tarreau
2021-08-19 18:39                       ` Jeff Layton
2021-08-19 19:15                         ` Linus Torvalds
2021-08-19 19:55                           ` Eric Biggers
2021-08-19 20:18                           ` Jeff Layton
2021-08-19 20:31                             ` Linus Torvalds
2021-08-19 21:43                               ` Jeff Layton
2021-08-19 22:32                                 ` Linus Torvalds [this message]
2021-08-20  8:30                                   ` David Laight
2021-08-23  7:55                                     ` Geert Uytterhoeven
2021-08-23  8:14                                       ` David Laight
2021-08-20 13:43                                   ` Steven Rostedt
2021-08-20 16:06                                     ` Linus Torvalds
2021-08-20  2:10                               ` Matthew Wilcox
2021-08-20  6:36                               ` Amir Goldstein
2021-08-20  7:14                                 ` Amir Goldstein
2021-08-20 12:27                                   ` Jeff Layton
2021-08-20 12:38                                     ` Willy Tarreau
2021-08-20 13:03                                       ` Jeff Layton
2021-08-20 13:11                                         ` Willy Tarreau
2021-08-20 16:30                           ` Kees Cook
2021-08-20 19:17                             ` H. Peter Anvin
2021-08-20 21:29                               ` Jeff Layton
2021-08-20 21:29                                 ` Jeff Layton
2021-08-21 12:45                                 ` Jeff Layton
2021-08-21 12:45                                   ` Jeff Layton
2021-08-23 22:15                                   ` J. Bruce Fields
2021-08-20 22:31                               ` Matthew Wilcox
2021-08-18  7:51                     ` [PATCH v1 0/7] Remove in-tree usage of MAP_DENYWRITE Christian Brauner
2021-08-18 15:42                   ` J. Bruce Fields
2021-08-19 13:56                     ` Eric W. Biederman
2021-08-19 14:33                       ` J. Bruce Fields
2021-08-20 12:54                         ` Jeff Layton
2021-08-20  3:44                     ` NeilBrown
2021-08-20  8:25                       ` David Laight
2021-08-12 19:24         ` David Hildenbrand
2021-08-12 18:15       ` Florian Weimer
2021-08-12 18:21         ` Linus Torvalds

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAHk-=wgHbYmUZvFkthGJ6zZx+ofTiiTRxPai5mPkmbtE=6JbaQ@mail.gmail.com' \
    --to=torvalds@linux-foundation.org \
    --cc=David.Laight@aculab.com \
    --cc=Kevin.Brodsky@arm.com \
    --cc=Nicolas.Viennot@twosigma.com \
    --cc=acme@kernel.org \
    --cc=adobriyan@gmail.com \
    --cc=akpm@linux-foundation.org \
    --cc=alexander.shishkin@linux.intel.com \
    --cc=andriy.shevchenko@linux.intel.com \
    --cc=axboe@kernel.dk \
    --cc=bp@alien8.de \
    --cc=catalin.marinas@arm.com \
    --cc=cfijalkovich@google.com \
    --cc=cgxu519@mykernel.net \
    --cc=chinwen.chang@mediatek.com \
    --cc=christian.brauner@ubuntu.com \
    --cc=ckoenig.leichtzumerken@gmail.com \
    --cc=daniel.m.jordan@oracle.com \
    --cc=david@redhat.com \
    --cc=ebiederm@xmission.com \
    --cc=elver@google.com \
    --cc=feng.tang@intel.com \
    --cc=fweimer@redhat.com \
    --cc=geert@linux-m68k.org \
    --cc=gerg@linux-m68k.org \
    --cc=hpa@zytor.com \
    --cc=jannh@google.com \
    --cc=jlayton@kernel.org \
    --cc=jolsa@redhat.com \
    --cc=keescook@chromium.org \
    --cc=krisman@collabora.com \
    --cc=linux-api@vger.kernel.org \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=linux-unionfs@vger.kernel.org \
    --cc=linux@rasmusvillemoes.dk \
    --cc=luto@kernel.org \
    --cc=mark.rutland@arm.com \
    --cc=mhocko@suse.com \
    --cc=miklos@szeredi.hu \
    --cc=mingo@redhat.com \
    --cc=mpe@ellerman.id.au \
    --cc=mtk.manpages@gmail.com \
    --cc=namhyung@kernel.org \
    --cc=npiggin@gmail.com \
    --cc=peterx@redhat.com \
    --cc=peterz@infradead.org \
    --cc=pmladek@suse.com \
    --cc=rostedt@goodmis.org \
    --cc=rppt@kernel.org \
    --cc=sergey.senozhatsky@gmail.com \
    --cc=shakeelb@google.com \
    --cc=shawn@anastas.io \
    --cc=steven.price@arm.com \
    --cc=surenb@google.com \
    --cc=tglx@linutronix.de \
    --cc=thomascedeno@google.com \
    --cc=vbabka@suse.cz \
    --cc=vincenzo.frascino@arm.com \
    --cc=viro@zeniv.linux.org.uk \
    --cc=walken@google.com \
    --cc=willy@infradead.org \
    --cc=x86@kernel.org \
    --cc=ying.huang@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.