Re: kernel panic (corruption of task struct)

[Stephen Lord <lord@sgi.com>]

Thomas Duffy wrote:

>On Sat, 2002-02-09 at 11:45, Stephen Lord wrote:
>
>>Stack overflow looks likely here. I don't know of any in xfs, but xfs in 
>>combination
>>with other things might cause problems. We had one case in LVM 
>>snapshotting where
>>LVM was putting large chunks of stuff on the stack. That code should not 
>>be in your
>>kernel though, unless you added it.
>>
>
>This is a stock xfs kernel rpm 1.0.2 from sgi.  No recompile, no addons
>-- we are not using lvm on this machine, anyways.  Any suggestions on
>how to figure out what is going on here?  Cause this is on a critical
>machine and having it go down every few days is not good...
>
>If it goes down again, is there anything I can do in kdb to help narrow
>down where this is happening?
>
>Thanks!
>
>-tduffy
>
Should this actually be stack overflow, the tricky part is that the 
crash usually
happens long after the overflow - when the corrupted task struct is 
accessed.
The one of these we found in LVM took a long time to locate.

All I can suggest right now is updating your kernel.

Steve