Re: [uml-devel] does 3.12.2 breaks UML with "con=xterm" ?

["Toralf Förster" <toralf.foerster@gmx.de>]

On 12/02/2013 10:21 PM, Richard Weinberger wrote:
> Am Sonntag, 1. Dezember 2013, 20:05:55 schrieb Toralf Förster:
>> On 12/01/2013 11:20 AM, Richard Weinberger wrote:
>>> I meant xterm for all consoles but con0...
>>> Such that you can trigger the crash but are still able to see the output.
>>
>> Not sure if the 2 attached files contains useful info, but here they are:
>>
>> The back trace of a hanging linux process :
>> $>sudo gdb /home/tfoerste/devel/linux/linux 27162 -n -batch -ex 'bt full' >
>> bt
>>
>> and stdout, error and bt of the core file from round #18 of this command :
>>
>> $> I=0; while [[ : ]]; do ((I=I+1)); echo; echo; echo $I; date; for i in
>> trinity.sh xterm linux port-helper start_uml.sh ; do pkill $i; done; rm -f
>> /mnt/ramdisk/core; start_uml.sh -r ~/virtual/uml/trinity -l
>> /home/tfoerste/devel/linux/linux -y 'con0=fd:0,fd:1 con=xterm'
>> 1>/mnt/ramdisk/$I.out 2>/mnt/ramdisk/$I.err; [[ -f /mnt/ramdisk/core ]] &&
>> gdb --core=/mnt/ramdisk/core /home/tfoerste/devel/linux/linux -n -batch -ex
>> 'bt full' > /mnt/ramdisk/$I.bt; sleep 10; done
> 
> What I can see is that UML panic()ed because PTRACE_SETREGS is failing with 
> ESRCH. This means one of the UML SKAS0 helper threads got killed and is gone.
> This is very strange and makes me worry, because in this stage the helper is 
> in stopped state and cannot really die by an UML error. Looks like it got 
> killed from outside.
> Is your host setup 100% sane? :)

Hhm - I've had 1 script running, which start an UML - and another
script, which every 3 minutes ssh into the started UML and run "halt;
exit". Before that I manually did both steps.

I let run the script solution for a while and did different things - but
of course I cannot swear that I did not by accident recalled a command
from a bash history command which killed processes (which I do have
regularly to do if I test the UML with trinity).

So likely my fault here - yes.


-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

------------------------------------------------------------------------------
Rapidly troubleshoot problems before they affect your business. Most IT 
organizations don't have a clear picture of how application performance 
affects their revenue. With AppDynamics, you get 100% visibility into your 
Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro!
http://pubads.g.doubleclick.net/gampad/clk?id=84349351&iu=/4140/ostg.clktrk
_______________________________________________
User-mode-linux-devel mailing list
User-mode-linux-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel