Package: emacs;
Reported by: Johan Claesson <johanclaesson <at> bredband.net>
Date: Sun, 3 Apr 2016 13:23:01 UTC
Severity: normal
Found in version 25.1.50
Done: Michael Albinus <michael.albinus <at> gmx.de>
Bug is archived. No further changes may be made.
View this message in rfc822 format
From: Johan Claesson <johanclaesson <at> bredband.net> To: 23207 <at> debbugs.gnu.org Subject: bug#23207: 25.1.50; file-notify event restarts the idle timer Date: Sun, 03 Apr 2016 15:22:05 +0200
Hi,
Every time there is a file-notify event the idle timer is restarted.
This will postpone the triggering of idle timers. If there are
periodical file-notify events they may prevent idle timers from ever
triggering. The following recipe creates periodical file-notify
events with the help of a normal non-idle timer. The poor idle timer
started last in the recipe will never get to run.
emacs -Q
(with-current-buffer (find-file-noselect "/tmp/changing.txt")
(setq auto-revert-interval 0.5)
(auto-revert-mode))
(run-with-timer 1 1 (lambda () (write-region "x" nil "/tmp/changing.txt")))
(run-with-idle-timer 3 t (lambda () (message "Just idling")))
The same behavior is also present in 24.4 and 24.5 (i have not checked
older versions).
The idle timer gets restarted in read_char in keyboard.c. The
following patch avoids this (but i am not sure it is the right
thing to do).
diff --git a/src/keyboard.c b/src/keyboard.c
index 1a5dbd0..b71c656 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -2834,7 +2834,9 @@ read_char (int commandflag, Lisp_Object map,
last_input_event = c;
call4 (Qcommand_execute, tem, Qnil, Fvector (1, &last_input_event), Qt);
- if (CONSP (c) && EQ (XCAR (c), Qselect_window) && !end_time)
+ if (CONSP (c)
+ && (EQ (XCAR (c), Qselect_window) || EQ (XCAR (c), Qfile_notify))
+ && !end_time)
/* We stopped being idle for this event; undo that. This
prevents automatic window selection (under
mouse_autoselect_window from acting as a real input event, for
This is in the handing of special-event-map which includes
file-notify. special-event-map includes some events that should
restart the idle timer because they are user input (like drag-n-drop).
But file-notify is not user input so i think it should not restart the
idle timer.
The same probably goes for dbus-event and config-changed-event that
also are in the special-event-map. Maybe they also should be exempted
in the same way.
Also i don't understand why this code checks for Qselect_window.
select-window is not included in special-event-map so that should
never turn up there.
Regards,
/Johan
In GNU Emacs 25.1.50.2 (x86_64-unknown-linux-gnu, X toolkit)
of 2016-04-01 built on goblin
Repository revision: 46edc38005ce47bdaae656a541858735a8ba5f26
Windowing system distributor 'The X.Org Foundation', version 11.0.11702000
System Description: Ubuntu 15.10
Configured using:
'configure --prefix=/ssd/home/jcl/usr --with-x-toolkit=lucid
--without-toolkit-scroll-bars --disable-silent-rules
--without-compress-install --enable-link-time-optimization
PKG_CONFIG_PATH=/home/jcl/usr/lib/pkgconfig'
Configured features:
XAW3D XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF
GSETTINGS NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF
XFT ZLIB LUCID X11
Important settings:
value of $LC_MONETARY: en_GB.UTF-8
value of $LC_NUMERIC: en_GB.UTF-8
value of $LC_TIME: en_GB.UTF-8
value of $LANG: en_US.UTF-8
value of $XMODIFIERS: @im=none
locale-coding-system: utf-8-unix
Major mode: Text
Minor modes in effect:
magit-auto-revert-mode: t
display-time-mode: t
minibuffer-depth-indicate-mode: t
num3-mode: t
minibuffer-electric-default-mode: t
icomplete-mode: t
diff-auto-refine-mode: t
erc-list-mode: t
erc-menu-mode: t
erc-autojoin-mode: t
erc-ring-mode: t
erc-networks-mode: t
erc-pcomplete-mode: t
erc-track-mode: t
erc-match-mode: t
erc-button-mode: t
erc-fill-mode: t
erc-stamp-mode: t
erc-netsplit-mode: t
erc-irccontrols-mode: t
erc-noncommands-mode: t
erc-move-to-prompt-mode: t
erc-readonly-mode: t
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async-bytecomp-package-mode: t
shell-dirtrack-mode: t
wc-mode: t
whitespace-mode: t
winner-mode: t
ido-everywhere: t
which-function-mode: t
global-eldoc-mode: t
electric-layout-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
global-prettify-symbols-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
temp-buffer-resize-mode: t
line-number-mode: t
auto-fill-function: do-auto-fill
transient-mark-mode: t
Recent messages:
Replaced 0 occurrences
Spell-checking region using aspell with default dictionary...done
Spell-checking suspended; use C-u M-$ to resume
Saving file /ssd/home/jcl/IDLE_TIMER_REPORT.el...
Wrote /ssd/home/jcl/IDLE_TIMER_REPORT.el
Saving file /ssd/home/jcl/IDLE_TIMER_REPORT.el...
Wrote /ssd/home/jcl/IDLE_TIMER_REPORT.el
Mark set
Saving file /ssd/home/jcl/IDLE_TIMER_REPORT.el...
Wrote /ssd/home/jcl/IDLE_TIMER_REPORT.el
Load-path shadows:
None found.
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Memory information:
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