From: Eli Zaretskii <eliz@gnu.org>
To: dima@secretsauce.net
Cc: 21556@debbugs.gnu.org
Subject: bug#21556: 25.0.50; Memory leak in emacs -Q with lucid (font)
Date: Fri, 25 Sep 2015 12:10:05 +0300 [thread overview]
Message-ID: <83bncqj24y.fsf@gnu.org> (raw)
In-Reply-To: <83d1x6j339.fsf@gnu.org>
> Date: Fri, 25 Sep 2015 11:49:30 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 21556@debbugs.gnu.org
>
> > From: Dima Kogan <dima@secretsauce.net>
> > Cc: 21556@debbugs.gnu.org
> > Date: Fri, 25 Sep 2015 01:13:15 -0700
> >
> > Hi. I just came back to this, figured out how to (semi-manually) put in
> > a watchpoint, and this watchpoint told me what's resetting the font
> > cache: the garbage collector. The backtrace in question:
> >
> > 0x00000000005d2172 in compact_font_cache_entry (entry=24121763) at alloc.c:5313
> > #0 0x00000000005d2172 in compact_font_cache_entry (entry=24121763) at alloc.c:5313
> > #1 0x00000000005d221b in compact_font_caches () at alloc.c:5339
> > #2 0x00000000005d2742 in garbage_collect_1 (end=0x7ffcdb166830) at alloc.c:5515
> > #3 0x00000000005d2e1d in Fgarbage_collect () at alloc.c:5720
> > #4 0x000000000054eb21 in maybe_gc () at lisp.h:4515
> > #5 0x00000000005f638c in Ffuncall (nargs=3, args=0x7ffcdb166988) at eval.c:2584
>
> Yes, that's what I wrote to you you meanwhile.
>
> This seems to mean that fonts whose entries in the cache are not
> marked are still being used, or are unused but not freed.
Some additional background for these issues:
This is why the font cache compaction was introduced:
http://lists.gnu.org/archive/html/emacs-devel/2013-10/msg00740.html
Here's one problem caused by the compaction code, and some followup
discussions with perhaps useful debug code:
http://debbugs.gnu.org/cgi/bugreport.cgi?bug=15876#77
This is another related bug, which eventually caused the font cache
compaction be ifdef'ed away for MS-Windows:
http://debbugs.gnu.org/cgi/bugreport.cgi?bug=16140
next prev parent reply other threads:[~2015-09-25 9:10 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-25 0:05 bug#21556: 25.0.50; Memory leak in emacs -Q with lucid (font) Dima Kogan
2015-09-25 6:45 ` Eli Zaretskii
2015-09-25 6:57 ` Dima Kogan
2015-09-25 8:44 ` Eli Zaretskii
2015-09-25 8:13 ` Dima Kogan
2015-09-25 8:49 ` Eli Zaretskii
2015-09-25 9:10 ` Eli Zaretskii [this message]
2015-09-25 9:30 ` Dima Kogan
2015-09-25 9:45 ` Eli Zaretskii
2015-09-25 10:03 ` Eli Zaretskii
[not found] ` <83y4ftfbjw.fsf@gnu.org>
2015-09-27 7:56 ` K. Handa
2015-09-27 8:09 ` Eli Zaretskii
2015-09-28 9:22 ` Dima Kogan
2015-09-28 9:58 ` Eli Zaretskii
2015-09-29 9:28 ` Dima Kogan
2015-09-30 7:00 ` Eli Zaretskii
2015-09-30 10:16 ` Dmitry Antipov
2015-10-01 9:42 ` Dima Kogan
2015-10-01 13:27 ` Dmitry Antipov
2015-10-01 18:50 ` Dima Kogan
2015-10-02 5:04 ` Dmitry Antipov
2015-10-02 18:56 ` Dima Kogan
2015-10-29 22:51 ` Dima Kogan
2015-10-30 14:20 ` Eli Zaretskii
2015-10-30 19:17 ` Dima Kogan
2015-10-30 20:38 ` Eli Zaretskii
2015-10-30 20:50 ` Dima Kogan
2015-11-09 2:55 ` Dima Kogan
2015-11-09 16:38 ` Eli Zaretskii
2019-11-17 6:34 ` Lars Ingebrigtsen
2019-11-17 15:38 ` Eli Zaretskii
2019-11-17 21:27 ` Dima Kogan
2019-11-18 8:13 ` Lars Ingebrigtsen
2015-09-29 10:05 ` K. Handa
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