GNU bug report logs - #20417
25.0.50; frequent crashes with global-auto-revert-mode

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Tom Tromey <tom <at> tromey.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 25.0.50; frequent crashes with global-auto-revert-mode
Date: Fri, 24 Apr 2015 09:17:31 -0600

I'm running some reasonably recent emacs trunk on x86-64 Fedora 20.

If I enable global-auto-revert-mode, Emacs crashes with some regularity.

I caught the crash in gdb once and tracked it down to this bug:

https://bugzilla.gnome.org/show_bug.cgi?id=739424

I am not sure whether Emacs can work around this or not.
Perhaps one approach would be to not use the glib file-polling code.




In GNU Emacs 25.0.50.5 (x86_64-unknown-linux-gnu, GTK+ Version 3.10.9)
 of 2015-04-02 on pokyo
Repository revision: ece8f600833e3011be976384f9a5657faa83f6db
Windowing system distributor `Fedora Project', version 11.0.11404000
System Description:	Fedora release 20 (Heisenbug)

Configured using:
 `configure --prefix=/home/tromey/Emacs/install'

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB

Important settings:
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: JS

Minor modes in effect:
  erc-notifications-mode: t
  flymake-mode: t
  erc-spelling-mode: t
  erc-truncate-mode: t
  shell-dirtrack-mode: t
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  projectile-global-mode: t
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  erc-fill-mode: t
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  erc-irccontrols-mode: t
  erc-noncommands-mode: t
  erc-move-to-prompt-mode: t
  erc-readonly-mode: t
  savehist-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  auto-fill-function: do-auto-fill

Recent messages:
(Shell command succeeded with no output)
Mark set
Quit [2 times]
Mark set [4 times]
Saving file /home/tromey/firefox-git/gecko-dev/browser/devtools/shared/widgets/CubicBezierWidget.js...
Add 2015 to copyright? (y or n) n
Wrote /home/tromey/firefox-git/gecko-dev/browser/devtools/shared/widgets/CubicBezierWidget.js
C-z C-g is undefined
When done with a buffer, type C-x #
(No files need saving)

Load-path shadows:
/home/tromey/.emacs.d/elpa/bubbles-0.5/bubbles hides /home/tromey/Emacs/install/share/emacs/25.0.50/lisp/play/bubbles

Features:
(shadow emacsbug vc-mtn vc-hg gnus-fun filecache novice cus-edit
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ob-exp org-src ob-keys ob-comint ob-core ob-eval org-compat org-macs
org-loaddefs two-column descr-text iso-transl url-http url-gw url-auth
eww url-queue bbdb-sc supercite regi css-mode cal-move mailalias
erc-desktop-notifications apropos log-edit dired-aux gdb-shell
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rst vc-annotate gnus-draft asm-mode gud log-view pcvs-util eieio-opt
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custom widget hashtable-print-readable backquote make-network-process
dbusbind gfilenotify dynamic-setting system-font-setting
font-render-setting move-toolbar gtk x-toolkit x multi-tty emacs)

Memory information:
((conses 16 4244894 918369)
 (symbols 48 144018 301)
 (miscs 40 46671 1822)
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 (string-bytes 1 21947269)
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 (buffers 976 879)
 (heap 1024 468654 444115))

Tom

Message #8 received at 20417 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Tom Tromey <tom <at> tromey.com>
Cc: 20417 <at> debbugs.gnu.org
Subject: 25.0.50; frequent crashes with global-auto-revert-mode
Date: Sat, 25 Apr 2015 18:58:14 -0700

[Message part 1 (text/plain, inline)]

> I am not sure whether Emacs can work around this or not.

I don't see an easy workaround.

> Perhaps one approach would be to not use the glib file-polling code.

That sounds like it may be the best way forward, at least in the short run.  If 
you configure --with-file-notification=inotify does the problem go away for you? 
 That is, does the attached patch work for you?

[0001-Use-gfile-notification-only-on-request.patch (text/x-patch, attachment)]

Message #11 received at 20417 <at> debbugs.gnu.org (full text, mbox):

From: Tom Tromey <tom <at> tromey.com>
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: 20417 <at> debbugs.gnu.org, Tom Tromey <tom <at> tromey.com>
Subject: Re: 25.0.50; frequent crashes with global-auto-revert-mode
Date: Mon, 27 Apr 2015 11:14:19 -0600

>> Perhaps one approach would be to not use the glib file-polling code.

Paul> That sounds like it may be the best way forward, at least in the short
Paul> run.  If you configure --with-file-notification=inotify does the
Paul> problem go away for you? That is, does the attached patch work for
Paul> you?

I rebuilt with --with-file-notification=inotify, but that did not work
very well.  I started getting this over and over:

Error while trying to read file system events

E.g. I did M-x list-packages and that message started appearing with
some regularity.

I've rebuilt with --with-file-notification=no, but it's too soon to see
how well it works.

Tom

Message #14 received at 20417 <at> debbugs.gnu.org (full text, mbox):

From: Marcin Borkowski <mbork <at> mbork.pl>
To: Tom Tromey <tom <at> tromey.com>
Cc: 20417 <at> debbugs.gnu.org, Paul Eggert <eggert <at> cs.ucla.edu>
Subject: Re: bug#20417: 25.0.50; frequent crashes with global-auto-revert-mode
Date: Wed, 06 Apr 2016 19:55:20 +0200

On 2015-04-27, at 11:14, Tom Tromey <tom <at> tromey.com> wrote:

>>> Perhaps one approach would be to not use the glib file-polling code.
>
> Paul> That sounds like it may be the best way forward, at least in the short
> Paul> run.  If you configure --with-file-notification=inotify does the
> Paul> problem go away for you? That is, does the attached patch work for
> Paul> you?
>
> I rebuilt with --with-file-notification=inotify, but that did not work
> very well.  I started getting this over and over:
>
> Error while trying to read file system events
>
> E.g. I did M-x list-packages and that message started appearing with
> some regularity.
>
> I've rebuilt with --with-file-notification=no, but it's too soon to see
> how well it works.

Hi Tom,

does this problem persist in more recent Emacs and/or with
--with-file-notification=no?

>
> Tom

Best,

-- 
Marcin

Message #17 received at 20417 <at> debbugs.gnu.org (full text, mbox):

From: Tom Tromey <tom <at> tromey.com>
To: Marcin Borkowski <mbork <at> mbork.pl>
Cc: 20417 <at> debbugs.gnu.org, Tom Tromey <tom <at> tromey.com>,
 Paul Eggert <eggert <at> cs.ucla.edu>
Subject: Re: bug#20417: 25.0.50; frequent crashes with global-auto-revert-mode
Date: Wed, 06 Apr 2016 12:02:43 -0600

>> I've rebuilt with --with-file-notification=no, but it's too soon to see
>> how well it works.

Marcin> does this problem persist in more recent Emacs and/or with
Marcin> --with-file-notification=no?

I think it works fine with that flag.

Tom

Message #20 received at 20417 <at> debbugs.gnu.org (full text, mbox):

From: Marcin Borkowski <mbork <at> mbork.pl>
To: Tom Tromey <tom <at> tromey.com>
Cc: 20417 <at> debbugs.gnu.org, Paul Eggert <eggert <at> cs.ucla.edu>
Subject: Re: bug#20417: 25.0.50; frequent crashes with global-auto-revert-mode
Date: Wed, 06 Apr 2016 21:11:23 +0200

On 2016-04-06, at 18:02, Tom Tromey <tom <at> tromey.com> wrote:

>>> I've rebuilt with --with-file-notification=no, but it's too soon to see
>>> how well it works.
>
> Marcin> does this problem persist in more recent Emacs and/or with
> Marcin> --with-file-notification=no?
>
> I think it works fine with that flag.

Thanks!  May I close the bug, then?

> Tom

Best,

-- 
Marcin Borkowski
http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
Faculty of Mathematics and Computer Science
Adam Mickiewicz University

Message #23 received at 20417 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Marcin Borkowski <mbork <at> mbork.pl>
Cc: 20417 <at> debbugs.gnu.org, Tom Tromey <tom <at> tromey.com>,
 Paul Eggert <eggert <at> cs.ucla.edu>
Subject: Re: bug#20417: 25.0.50; frequent crashes with global-auto-revert-mode
Date: Wed, 06 Apr 2016 16:51:02 -0400

Marcin Borkowski wrote:

> Thanks!  May I close the bug, then?

No, because the linked glib bug is still open, and the default behaviour
of configure may use it by default.  See eg unapplied suggestion
from http://debbugs.gnu.org/20417#8 .

Message #26 received at 20417 <at> debbugs.gnu.org (full text, mbox):

From: Marcin Borkowski <mbork <at> mbork.pl>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 20417 <at> debbugs.gnu.org, Tom Tromey <tom <at> tromey.com>,
 Paul Eggert <eggert <at> cs.ucla.edu>
Subject: Re: bug#20417: 25.0.50; frequent crashes with global-auto-revert-mode
Date: Thu, 07 Apr 2016 05:54:47 +0200

On 2016-04-06, at 20:51, Glenn Morris <rgm <at> gnu.org> wrote:

> Marcin Borkowski wrote:
>
>> Thanks!  May I close the bug, then?
>
> No, because the linked glib bug is still open, and the default behaviour
> of configure may use it by default.  See eg unapplied suggestion
> from http://debbugs.gnu.org/20417#8 .

OK, so I'm leaving it as it is.

Best,

-- 
Marcin Borkowski
http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
Faculty of Mathematics and Computer Science
Adam Mickiewicz University

Message #29 received at 20417 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 20417 <at> debbugs.gnu.org, Tom Tromey <tom <at> tromey.com>,
 Marcin Borkowski <mbork <at> mbork.pl>, Ken Brown <kbrown <at> cornell.edu>,
 Paul Eggert <eggert <at> cs.ucla.edu>
Subject: Re: bug#20417: 25.0.50; frequent crashes with global-auto-revert-mode
Date: Wed, 31 Aug 2016 15:48:31 +0200

Glenn Morris <rgm <at> gnu.org> writes:

> Marcin Borkowski wrote:
>
>> Thanks!  May I close the bug, then?
>
> No, because the linked glib bug is still open, and the default behaviour
> of configure may use it by default.  See eg unapplied suggestion
> from http://debbugs.gnu.org/20417#8 .

In Emacs 25.1, the default file notification library is inotify for
GNU/Linux, kqueue for *BSD and OS X, and w32notify for MS Windows.

gfilenotify is the default library only for Cygwin. And there, we have a
similar bug#20927 about global-auto-revert-mode and file
notifications. The difference is, that Emacs does not crash there, but
makes Emacs unresponsive for a while.

Therefore, I would like to close *this* bug. We cannot do anything to
force a solution of the glib bug. Objections?

Best regards, Michael.

Message #34 received at 20417-done <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: 20417-done <at> debbugs.gnu.org
Subject: Re: bug#20417: 25.0.50; frequent crashes with global-auto-revert-mode
Date: Thu, 15 Sep 2016 10:25:10 +0200

Michael Albinus <michael.albinus <at> gmx.de> writes:

> In Emacs 25.1, the default file notification library is inotify for
> GNU/Linux, kqueue for *BSD and OS X, and w32notify for MS Windows.
>
> gfilenotify is the default library only for Cygwin. And there, we have a
> similar bug#20927 about global-auto-revert-mode and file
> notifications. The difference is, that Emacs does not crash there, but
> makes Emacs unresponsive for a while.
>
> Therefore, I would like to close *this* bug. We cannot do anything to
> force a solution of the glib bug. Objections?

Closed.

Best regards, Michael.

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