Bug 32788 – kernel BUG at sched.c:564 (2.4.22-ben2)

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description Charles Price 2003-11-05 05:31:50 UTC]

Running a python script intermittently (yet frequently) causes my Powerbook 12"
867MHz to crash - the following being dumped to my console. I'm not sure whether
it's solely python causing this but that's what I happen to be developing in at
the moment ;-)

I've tried un-prelinking my python binary - but it still crashes frequently.

--
kernel BUG at sched.c:564!
Vector: 0 at pc = c0015cfc (T schedule+0x4d8), lr = c0015cfc (T schedule+0x4d8)
msr = 9032, sp = e61e9910 [e61e9848]
current = e61e8000, pid = 1392, comm = python
mon>

Reproducible: Sometimes
Steps to Reproduce:
1.
2.
3.




Portage 2.0.49-r15 (default-ppc-1.4, gcc-3.2.3, glibc-2.3.2-r1, 2.4.22-ben2)
=================================================================
System uname: 2.4.22-ben2 ppc
Gentoo Base System version 1.4.3.10
ACCEPT_KEYWORDS="ppc"
AUTOCLEAN="yes"
CFLAGS="-O2 -pipe -mcpu=7450 -maltivec -mabi=altivec"
CHOST="powerpc-unknown-linux-gnu"
COMPILER="gcc3"
CONFIG_PROTECT="/etc /var/qmail/control /usr/kde/2/share/config
/usr/kde/3/share/config /usr/X11R6/lib/X11/xkb /usr/kde/3.1/share/config
/usr/share/config"
CONFIG_PROTECT_MASK="/etc/gconf /etc/env.d"
CXXFLAGS="-O2 -pipe -mcpu=7450 -maltivec -mabi=altivec"
DISTDIR="/usr/portage/distfiles"
FEATURES="ccache"
GENTOO_MIRRORS="http://www.mirror.ac.uk/sites/www.ibiblio.org/gentoo
http://www.ibiblio.org/pub/Linux/distributions/gentoo"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY=""
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="oss dvd xv jpeg nls mitshm gif mozilla png truetype ppc cups foomaticdb
gnome-libs gdbm berkdb slang readline arts X sdl gpm tcpd pam libwww ssl perl
python esd imlib oggvorbis gtk qt kde motif opengl cdr -gnome alsa java"

[Comment 1 Charles Price 2003-11-05 06:03:13 UTC]

Thought I'd better add... The python script that I'm developing accesses
devices on the USB bus. It is this that could be causing the crashes.

[Comment 2 Luca Barbato 2003-11-05 13:20:45 UTC]

could you please tell me what script is causing the problem?

[Comment 3 Charles Price 2003-11-05 13:40:48 UTC]

Created attachment 20304 [details]
My python script, which appears to cause the crash

[Comment 4 Charles Price 2003-11-05 13:46:14 UTC]

Luca,

I have attached my Python script, which appears to be causing this crash.
It may or may not be of use. Hamlib ( http://hamlib.sourceforge.net ) is
a program to control a amateur radio tranciever over a serial port. I am
using a Prolific USB-serial adaptor (pl2303) to connect the radio to my Powerbook.
The kernel crashes perhaps once every ten times I try to access /dev/usb/tts/0

Hope this helps,

Charlie

[Comment 5 Charles Price 2003-11-05 14:32:25 UTC]

Created attachment 20309 [details]
The backtrace

[Comment 6 Bartosch Pixa (RETIRED) 2004-02-15 05:35:11 UTC]

could you plz try a more recent kernel ?

[Comment 7 Pieter Van den Abeele (RETIRED) 2004-06-02 13:35:04 UTC]

BUG statement removed from code in a more recent kernel