[uml-devel] debug 2.6.7

[uml-devel] debug 2.6.7

[seb]

Hi,

---------------------------
Starting MTA: exim4.
Starting PostgreSQL database server: postmaster.
Starting OpenBSD Secure Shell server: sshd.
Starting deferred execution scheduler: atd.
Starting periodic command scheduler: cron.

Debian GNU/Linux 3.1 vhost tty0

vhost login: Out of Memory: Killed process 3773 (xmlhandler.fcpl).
Kernel panic: Kernel mode fault at addr 0x5be8c750, ip 0x40325b88
In interrupt handler - not syncing
 ---Type <return> to continue, or q <return> to quit---Detaching after 
fork from child process 30031.


Program exited with code 01.
(gdb)
------------------------------

how do I get a backtrace for this ?


started with:
handle SIGSEGV pass nostop noprint
handle SIGUSR1 pass nostop noprint
break panic





/sebastian


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Re: [uml-devel] debug 2.6.7

[Adam Heath]

On Wed, 18 Aug 2004, seb wrote:

> Hi,
>
> ---------------------------
> Starting MTA: exim4.
> Starting PostgreSQL database server: postmaster.
> Starting OpenBSD Secure Shell server: sshd.
> Starting deferred execution scheduler: atd.
> Starting periodic command scheduler: cron.
>
> Debian GNU/Linux 3.1 vhost tty0
>
> vhost login: Out of Memory: Killed process 3773 (xmlhandler.fcpl).

Increase the memory for the uml, using 'mem=xxx' on the cmdline.  The default
is 32m.


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Re: [uml-devel] debug 2.6.7

[seb]

Hi Adam,

I let the memory consumtion of "xmlhandler.fcpl" grew with intend to see 
what will happen.

The result was a kernel panic (which should not happen).

For a reason unknown to me, I was not able the get the backtrace for 
that panic, do you know how to do ? (see my first mail)


PS: currently I am testing user-mode-linux for a large scale deployment 
in my company, but Iam faced with a number of unresolved problems. (for 
sure, most of them due to my lack of understanding how to do it right, 
but not all). My C coding skills are not good enough to fix the bugs, 
the only thing I can to is to stress uml and make bugs reproducable, to 
help the core delopers to fix them.

/sebastian

Adam Heath wrote:

>On Wed, 18 Aug 2004, seb wrote:
>
>  
>
>>Hi,
>>
>>---------------------------
>>Starting MTA: exim4.
>>Starting PostgreSQL database server: postmaster.
>>Starting OpenBSD Secure Shell server: sshd.
>>Starting deferred execution scheduler: atd.
>>Starting periodic command scheduler: cron.
>>
>>Debian GNU/Linux 3.1 vhost tty0
>>
>>vhost login: Out of Memory: Killed process 3773 (xmlhandler.fcpl).
>>    
>>
>
>Increase the memory for the uml, using 'mem=xxx' on the cmdline.  The default
>is 32m.
>
>
>-------------------------------------------------------
>SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media
>100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33
>Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift.
>http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285
>_______________________________________________
>User-mode-linux-devel mailing list
>User-mode-linux-devel@lists.sourceforge.net
>https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
>  
>



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Re: [uml-devel] debug 2.6.7

[Jeff Dike]

seb@exse.net said:
> vhost login: Out of Memory: Killed process 3773 (xmlhandler.fcpl).
> Kernel panic: Kernel mode fault at addr 0x5be8c750, ip 0x40325b88
> In interrupt handler - not syncing 

It looks like you already had it running under gdb.  Just put a breakpoint
on panic ahead of time, and get a backtrace when you hit it.

				Jeff



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