Bugzilla Bug 177890

Liferea 1.2.13, recently upgraded, spins taking 100% of one core while printing
continuously the following message on console:

(Gecko:32552): GThread-CRITICAL **: g_cond_timed_wait_posix_impl: assertion
`end_time.tv_nsec < G_NSEC_PER_SEC' failed


Reproducible: Always

Steps to Reproduce:
1. Start liferea on console
2. Wait a bit until CPU spins
3. Look at the console

Actual Results:  
as described

Expected Results:  
no assertions on console, no 100% cores...

 $ emerge --info
Portage 2.1.2.2 (default-linux/amd64/2007.0/desktop, gcc-4.1.2, glibc-2.5-r2,
2.6.21-gentoo x86_64)
=================================================================
System uname: 2.6.21-gentoo x86_64 Intel(R) Core(TM)2 CPU         T7200  @
2.00GHz
Gentoo Base System release 1.12.9
Timestamp of tree: Thu, 10 May 2007 05:30:01 +0000
dev-java/java-config: 1.3.7, 2.0.32
dev-lang/python:     2.4.4
dev-python/pycrypto: 2.0.1-r5
sys-apps/sandbox:    1.2.17
sys-devel/autoconf:  2.13, 2.61
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10
sys-devel/binutils:  2.16.1-r3
sys-devel/gcc-config: 1.3.16
sys-devel/libtool:   1.5.22
virtual/os-headers:  2.6.21
ACCEPT_KEYWORDS="amd64"
AUTOCLEAN="yes"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=nocona -O2 -pipe -ftree-vectorize -ftree-vectorizer-verbose=1"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config
/usr/kde/3.5/shutdown /usr/share/X11/xkb /usr/share/config /var/bind"
CONFIG_PROTECT_MASK="/etc/env.d /etc/env.d/java/ /etc/gconf
/etc/php/apache1-php5/ext-active/ /etc/php/apache2-php5/ext-active/
/etc/php/cgi-php5/ext-active/ /etc/php/cli-php5/ext-active/ /etc/revdep-rebuild
/etc/splash /etc/terminfo /etc/texmf/web2c"
CXXFLAGS="-march=nocona -O2 -pipe -ftree-vectorize -ftree-vectorizer-verbose=1"
DISTDIR="/usr/portage/distfiles"
FEATURES="distlocks metadata-transfer sandbox sfperms strict"
GENTOO_MIRRORS="http://distfiles.gentoo.org
http://distro.ibiblio.org/pub/linux/distributions/gentoo"
LANG="es_ES.UTF-8"
LINGUAS="es es_ES en"
MAKEOPTS=""
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress
--force --whole-file --delete --delete-after --stats --timeout=180
--exclude=/distfiles --exclude=/local --exclude=/packages
--filter=H_**/files/digest-*"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/local/portage /usr/local/layman/voip"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="X aac acl acpi aiglx alsa amd64 apache2 arts avahi avi bash-completion
berkdb bitmap-fonts bluetooth bonjour cairo cdr cli cracklib crypt cups curl
dbus dlloader dri dvd dvdr dvdread eds emboss encode esd evdev evo fam firefox
fortran galago gdbm gif gnome gpm gstreamer gtk gtk2 hal iconv icu iproute2
ipv6 isdnlog java jpeg kde kdehiddenvisibility kerberos lcms ldap libg++
logrotate lucene mad midi mikmod mmx mono mouse mp3 mpeg ncurses nls nptl
nptlonly nsplugin obex ogg opengl oss pam pcre pdf pdflib perl png ppds pppd
python qt3 qt3support qt4 quicktime readline reflection sdl session spell spl
sse sse2 ssl svg tcpd theora threads tiff truetype truetype-fonts type1-fonts
udev unicode v4l v4l2 vorbis xinerama xml xorg xrandr xv xvid zlib"
ALSA_CARDS="hda-intel" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare
dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mulaw
multi null plug rate route share shm softvol" DVB_CARDS="usb-wt220u"
ELIBC="glibc" INPUT_DEVICES="synaptics mouse evdev keyboard" KERNEL="linux"
LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses
text" LINGUAS="es es_ES en" USERLAND="GNU" VIDEO_CARDS="vesa i810 intel"
Unset:  CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, LDFLAGS,
PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

I know.  I get this too.  Here's what upstream had to say about it:


This is a known problem. It only happens when using Gecko for rendering
and it doesn't happen with every Gecko version. I currently cannot
reproduce it, but had the same problem some months ago and even a while
before.

The problem is that I do not how to realize safe GDK thread locking with
Gecko which does not support the GDK locking style, at least until now I
found no way to use it without dead locking right after startup. And
without correct locking I assume it is just a timing propability that
the program locks up.

Won't fix, as I have no clue how.


This is so bad that I'm considering stopping using liferea.

The extra problem here is that I can't use gtkhtml, even if the build does not
show the USE flag in parenthesis, inside it:

 !amd64? ( !xulrunner? ( !firefox? ( !seamonkey? ( =gnome-extra/gtkhtml-2* ) )
) )
 !amd64? ( gtkhtml? ( =gnome-extra/gtkhtml-2* ) )

so amd64 can't try gtkhtml :(

Nope.  gtkhtml isn't supported (and often crashes) on amd64.  Sorry.  You can
try firefox or seamonkey; I've only seen the problem on the newest xulrunner.

I've tracked this down to a 2.6.21 kernel bug on core2duos, possibly on the
T7200 (since all known instances of this bug are on T7200's)

The best solution at this point is to downgrade to 2.6.20, since this will
undoubtedly cause other problems than liferea hanging.  I will commit a
workaround to liferea tomorrow, however, if it survives the night intact.

I'm changing this to the correct kernel bug, and assigning to kernel, so it can
block 2.6.21 going stable on amd64 until the upstream patch goes in.

Please post the following from the system this is happening on:

* dmesg
* lspci
* lsmod
* kernel config

Thanks

wouldn't it make sense to push the micropatch:


--- arch/x86_64/kernel/vsyscall.c
+++ arch/x86_64/kernel/vsyscall.c
@@ -132,7 +132,7 @@ static __always_inline void do_vgettimeo

        /* convert to usecs and add to timespec: */
        tv->tv_usec += nsec_delta / NSEC_PER_USEC;
-       while (tv->tv_usec > USEC_PER_SEC) {
+       while (tv->tv_usec >= USEC_PER_SEC) {
                tv->tv_sec += 1;
                tv->tv_usec -= USEC_PER_SEC;
        }


in http://bugzilla.kernel.org/show_bug.cgi?id=8479 , or the full patch:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blobdiff;f=arch/x86_64/kernel/vsyscall.c;h=dc32cef961950915fbaa185e36ab802d5f7cea3b;hp=ba330f87067996a17495f7d03466d646c718b52c;hb=c8118c6c07f2edfd697aaa0b93e08c3b65a5a675;hpb=272a3713bb9e302e0455c894c41180a482d2c8a3

into 2.6.21 patchset for amd64? Just FYI

Indeed, will do that. Thanks.

Fixed in gentoo-sources-2.6.21-r1 (genpatches-2.6.21-2)

FYI, it is already patches in gentoo-sources-2.6.21-r1