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<H1>[Mageia-dev] Strange system stalls - neep a tip</H1>
<B>Dimitrios Glentadakis</B>
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TITLE="[Mageia-dev] Strange system stalls - neep a tip">dglent at gmail.com
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<I>Tue May 22 06:50:11 CEST 2012</I>
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<PRE>Στις 21/05/2012 23:17:05 Mahmut Bulut γράψατε:
><i> probably ntpd won't cause something like this, this is not a botnet
</I>><i> attack :) and also situation can't caused from cpu usage. I think it
</I>><i> can be (and your thought i appreciate) is kernel-related problem.
</I>><i> And use a c code something like that to panic;
</I>><i>
</I>><i> char *kernel_panic = NULL;
</I>><i> char message = *kernel_panic;
</I>><i>
</I>><i> and build a kernel extension after this use insmod to load kernel ext.
</I>><i> reboot and wait for panicking.
</I>><i> after panicking fall into terminal mode(if you can't, you can do it on
</I>><i> next reboot)
</I>><i> if you saw your system.map or where the log happens something like
</I>><i> "warn_slowpath_common+0x***" this can be caused by your eax and pc's
</I>><i> async work (program counter) your specific problem and it is not
</I>><i> caused by any distro but you can submit your trace to kernel
</I>><i> developers for debugging purposes and will be fixed.
</I>><i>
</I>><i> 2012/5/21, Robert Fox <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">list at foxconsult.net</A>>:
</I>><i> > On Mon, 2012-05-21 at 19:50 +0200, David Sjölin wrote:
</I>><i> >> On Mon, May 21, 2012 at 7:33 PM, AL13N <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">alien at rmail.be</A>> wrote:
</I>><i> >> > perhaps check the logs (/var/log/messages) for information regarding
</I>><i> >> > those
</I>><i> >> > downtimes.
</I>><i> >> >
</I>><i> >> > see if the ping also delays
</I>><i> >> >
</I>><i> >> > perhaps try to monitor something via ssh or in tty, to see if it's only
</I>><i> >> > the graphic card.
</I>><i> >> >
</I>><i> >> > also, check ntpd settings, do they make big jumps?
</I>><i> >> >
</I>><i> >> > etc...
</I>><i> >> >
</I>><i> >> >
</I>><i> >> > in short: logging is always the key.
</I>><i> >> >
</I>><i> >> >> Hello All -
</I>><i> >> >>
</I>><i> >> >> I am experiencing a strange problem with a specific machine running
</I>><i> >> >> Cauldron. I am beginning to believe it is NOT a Mageia problem
</I>><i> >> >> because
</I>><i> >> >> when I boot into Ubuntu 12.04 the problem exists as well. I think it
</I>><i> >> >> may be hardware related but I can not find what is causing this issue.
</I>><i> >> >>
</I>><i> >> >> The machine is an Acer Aspire x3900 with a quad core ‎AMD Phenom(tm)
</I>><i> >> >> II
</I>><i> >> >> X4 925 Processor - 6GB memory. GeForce GT215 (GeForce 320) card. I am
</I>><i> >> >> running the x86_64 version of Cauldron.
</I>><i> >> >>
</I>><i> >> >> The problem occurs under both KDE and Gnome
</I>><i> >> >>
</I>><i> >> >> Basically, the system seems to freeze up (mouse moves) but nothing
</I>><i> >> >> else
</I>><i> >> >> - gkrellem freezes and no errors occur - it just seems to hang - but
</I>><i> >> >> magically wake up again after some time (many seconds at a time)
</I>><i> >> >>
</I>><i> >> >> I have checked various logs and can not find any problems - so I am
</I>><i> >> >> stumped how to find the source of the problem. I leave the machine
</I>><i> >> >> running 24x7, but don't think it is a thermal issue.
</I>><i> >> >>
</I>><i> >> >> When the system runs under Windows 7 (64bit) it appears to run fine.
</I>><i> >> >>
</I>><i> >> >> Any hints what I could check?
</I>><i> >> >>
</I>><i> >>
</I>><i> >> Hello!
</I>><i> >>
</I>><i> >> If you want to log cpuusage to see if some process has extra high cpu
</I>><i> >> usage during this freeze you could do something like:
</I>><i> >>
</I>><i> >> while true; do date >> testfilen.txt ; top -b -n1 >> testfilen.txt ;
</I>><i> >> sleep 1; done
</I>><i> >>
</I>><i> >> Then you will get top-output every second (sleep 1) or whatever time
</I>><i> >> you specify for sleep. I think there is a way to do this with top
</I>><i> >> only, without the delay but not sure which flags to use then (possibly
</I>><i> >> top -d 1 -b)
</I>><i> >>
</I>><i> >> The file testfilen.txt will of course grow quite large after a while,
</I>><i> >> so you can't keep this running 24/7 maybe, but maybe you could clear
</I>><i> >> out the file regularly until you get the error situation again and
</I>><i> >> then based on the date output you should be able to find cpu usage
</I>><i> >> around the time of the problem.
</I>><i> >>
</I>><i> >> Regards,
</I>><i> >>
</I>><i> >> David
</I>><i> >
</I>><i> > Thanks for the quick responses. I checked the cpu usage, but there
</I>><i> > doesn't appear to be a spike - and the load average in htop is real low:
</I>><i> >
</I>><i> > load average: 0.46, 0.67, 0.56
</I>><i> >
</I>><i> > so if the X server or something else was maxing out the cpu, I'd see
</I>><i> > that.
</I>><i> >
</I>><i> > Also, if I use a console in KDE (like yakuake) - the stalls happen in
</I>><i> > there as well. At first I though this was Firefox related (like flash
</I>><i> > problem or something) because it was most noticeable when I surfed -
</I>><i> > firefox freezes off and on and it is really frustrating.
</I>><i> >
</I>><i> > This machine was working fine for at least a year - and I was suspecting
</I>><i> > something with the latest kernels and the AMD processor - but have no
</I>><i> > evidence.
</I>><i> >
</I>><i> > The search continues . . .
</I>><i> >
</I>><i> > Thanks again,
</I>><i> > R.Fox
</I>><i> >
</I>><i> >
</I>><i> >
</I>><i> >
</I>><i>
</I>
I have the same symptoms and some times with this message (in n:
Message from <A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">syslogd at localhost</A> at May 15 07:14:15 ...
kernel:general protection fault: 0000 [#153] SMP
Message from <A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">syslogd at localhost</A> at May 15 07:14:15 ...
kernel:last sysfs file: /sys/devices/pci0000:00/0000:00:00.0/modalias
Message from <A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">syslogd at localhost</A> at May 15 07:14:15 ...
kernel:Stack:
Message from <A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">syslogd at localhost</A> at May 15 07:14:15 ...
kernel:Call Trace:
Message from <A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">syslogd at localhost</A> at May 15 07:14:15 ...
kernel:Code: 00 e8 80 9c 29 00 48 8b 1c 24 4c 8b 64 24 08 c9 c3 eb 03 90 90 90 55 48 89 e5 53 48 83 ec 18 66 66 66 66 90 48 8b 47 60 48 89 fb <ff> 10 83 f8 00 7e 0a 48 89 d8 48 83 c4 18 5b c9 c3 75 18 48 89
Message from <A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">syslogd at localhost</A> at May 15 07:14:15 ...
kernel:general protection fault: 0000 [#154] SMP
Message from <A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">syslogd at localhost</A> at May 15 07:14:15 ...
kernel:last sysfs file: /sys/devices/pci0000:00/0000:00:00.0/modalias
Message from <A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">syslogd at localhost</A> at May 15 07:14:15 ...
kernel:Stack:
Message from <A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">syslogd at localhost</A> at May 15 07:14:15 ...
kernel:Call Trace:
Message from <A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">syslogd at localhost</A> at May 15 07:14:15 ...
kernel:Code: 00 e8 80 9c 29 00 48 8b 1c 24 4c 8b 64 24 08 c9 c3 eb 03 90 90 90 55 48 89 e5 53 48 83 ec 18 66 66 66 66 90 48 8b 47 60 48 89 fb <ff> 10 83 f8 00 7e 0a 48 89 d8 48 83 c4 18 5b c9 c3 75 18 48 89
Message from <A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">syslogd at localhost</A> at May 15 07:14:15 ...
kernel:general protection fault: 0000 [#155] SMP
Message from <A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">syslogd at localhost</A> at May 15 07:14:15 ...
kernel:last sysfs file: /sys/devices/pci0000:00/0000:00:00.0/modalias
Message from <A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">syslogd at localhost</A> at May 15 07:14:15 ...
kernel:Stack:
Message from <A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">syslogd at localhost</A> at May 15 07:14:15 ...
kernel:Call Trace:
Message from <A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">syslogd at localhost</A> at May 15 07:14:15 ...
kernel:Code: 00 e8 80 9c 29 00 48 8b 1c 24 4c 8b 64 24 08 c9 c3 eb 03 90 90 90 55 48 89 e5 53 48 83 ec 18 66 66 66 66 90 48 8b 47 60 48 89 fb <ff> 10 83 f8 00 7e 0a 48 89 d8 48 83 c4 18 5b c9 c3 75 18 48 89
* Error: Unable to use "ps" to scan for gpg-agent processes
* Error: Please report to <A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">drobbins at funtoo.org</A> via <A HREF="http://bugs.gentoo.org">http://bugs.gentoo.org</A>
Yesterday morning happened always and i had to reboot the system every 10 minutes ...
I have upload the output of /var/log/messages here:
<A HREF="http://pastebin.com/nNDYUbuu">http://pastebin.com/nNDYUbuu</A>
--
Dimitrios Glentadakis
</PRE>
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