[Mageia-dev] Strange system stalls - neep a tip

Tue May 22 06:50:11 CEST 2012

Στις 21/05/2012 23:17:05 Mahmut Bulut γράψατε:
> probably ntpd won't cause something like this, this is not a botnet
> attack :) and also situation can't caused from cpu usage. I think it
> can be (and your thought i appreciate) is kernel-related problem.
> And use a c code something like that to panic;
> 
> char *kernel_panic = NULL;
> char message = *kernel_panic;
> 
> and build a kernel extension after this use insmod to load kernel ext.
> reboot and wait for panicking.
> after panicking fall into terminal mode(if you can't, you can do it on
> next reboot)
> if you saw your system.map or where the log happens something like
> "warn_slowpath_common+0x***" this can be caused by your eax and pc's
> async work (program counter) your specific problem and it is not
> caused by any distro but you can submit your trace to kernel
> developers for debugging purposes and will be fixed.
> 
> 2012/5/21, Robert Fox <list at foxconsult.net>:
> > On Mon, 2012-05-21 at 19:50 +0200, David Sjölin wrote:
> >> On Mon, May 21, 2012 at 7:33 PM, AL13N <alien at rmail.be> wrote:
> >> > perhaps check the logs (/var/log/messages) for information regarding
> >> > those
> >> > downtimes.
> >> >
> >> > see if the ping also delays
> >> >
> >> > perhaps try to monitor something via ssh or in tty, to see if it's only
> >> > the graphic card.
> >> >
> >> > also, check ntpd settings, do they make big jumps?
> >> >
> >> > etc...
> >> >
> >> >
> >> > in short: logging is always the key.
> >> >
> >> >> Hello All -
> >> >>
> >> >> I am experiencing a strange problem with a specific machine running
> >> >> Cauldron.  I am beginning to believe it is NOT a Mageia problem
> >> >> because
> >> >> when I boot into Ubuntu 12.04 the problem exists as well.  I think it
> >> >> may be hardware related but I can not find what is causing this issue.
> >> >>
> >> >> The machine is an Acer Aspire x3900 with a quad core ‎AMD Phenom(tm)
> >> >> II
> >> >> X4 925 Processor - 6GB memory.  GeForce GT215 (GeForce 320) card. I am
> >> >> running the x86_64 version of Cauldron.
> >> >>
> >> >> The problem occurs under both KDE and Gnome
> >> >>
> >> >> Basically, the system seems to freeze up (mouse moves) but nothing
> >> >> else
> >> >> - gkrellem freezes and no errors occur - it just seems to hang - but
> >> >> magically wake up again after some time (many seconds at a time)
> >> >>
> >> >> I have checked various logs and can not find any problems - so I am
> >> >> stumped how to find the source of the problem.  I leave the machine
> >> >> running 24x7, but don't think it is a thermal issue.
> >> >>
> >> >> When the system runs under Windows 7 (64bit) it appears to run fine.
> >> >>
> >> >> Any hints what I could check?
> >> >>
> >>
> >> Hello!
> >>
> >> If you want to log cpuusage to see if some process has extra high cpu
> >> usage during this freeze you could do something like:
> >>
> >> while true; do date >> testfilen.txt ; top -b -n1 >> testfilen.txt ;
> >> sleep 1; done
> >>
> >> Then you will get top-output every second (sleep 1) or whatever time
> >> you specify for sleep. I think there is a way to do this with top
> >> only, without the delay but not sure which flags to use then (possibly
> >> top -d 1 -b)
> >>
> >> The file testfilen.txt will of course grow quite large after a while,
> >> so you can't keep this running 24/7 maybe, but maybe you could clear
> >> out the file regularly until you get the error situation again and
> >> then based on the date output you should be able to find cpu usage
> >> around the time of the problem.
> >>
> >> Regards,
> >>
> >> David
> >
> > Thanks for the quick responses.  I checked the cpu usage, but there
> > doesn't appear to be a spike - and the load average in htop is real low:
> >
> > load average: 0.46, 0.67, 0.56
> >
> > so if the X server or something else was maxing out the cpu, I'd see
> > that.
> >
> > Also, if I use a console in KDE (like yakuake) - the stalls happen in
> > there as well.  At first I though this was Firefox related (like flash
> > problem or something) because it was most noticeable when I surfed -
> > firefox freezes off and on and it is really frustrating.
> >
> > This machine was working fine for at least a year - and I was suspecting
> > something with the latest kernels and the AMD processor - but have no
> > evidence.
> >
> > The search continues . . .
> >
> > Thanks again,
> > R.Fox
> >
> >
> >
> >
> 

I have the same symptoms and some times with this message (in n:

Message from syslogd at localhost at May 15 07:14:15 ...
 kernel:general protection fault: 0000 [#153] SMP 

Message from syslogd at localhost at May 15 07:14:15 ...
 kernel:last sysfs file: /sys/devices/pci0000:00/0000:00:00.0/modalias

Message from syslogd at localhost at May 15 07:14:15 ...
 kernel:Stack:

Message from syslogd at localhost at May 15 07:14:15 ...
 kernel:Call Trace:

Message from syslogd at localhost 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 syslogd at localhost at May 15 07:14:15 ...
 kernel:general protection fault: 0000 [#154] SMP 

Message from syslogd at localhost at May 15 07:14:15 ...
 kernel:last sysfs file: /sys/devices/pci0000:00/0000:00:00.0/modalias

Message from syslogd at localhost at May 15 07:14:15 ...
 kernel:Stack:

Message from syslogd at localhost at May 15 07:14:15 ...
 kernel:Call Trace:

Message from syslogd at localhost 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 syslogd at localhost at May 15 07:14:15 ...
 kernel:general protection fault: 0000 [#155] SMP 

Message from syslogd at localhost at May 15 07:14:15 ...
 kernel:last sysfs file: /sys/devices/pci0000:00/0000:00:00.0/modalias

Message from syslogd at localhost at May 15 07:14:15 ...
 kernel:Stack:

Message from syslogd at localhost at May 15 07:14:15 ...
 kernel:Call Trace:

Message from syslogd at localhost 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 drobbins at funtoo.org via http://bugs.gentoo.org

Yesterday morning happened always and i had to reboot the system every 10 minutes ...

I have upload the output of /var/log/messages here:
http://pastebin.com/nNDYUbuu

-- 
Dimitrios Glentadakis