having trouble with kdb on smp (kernel 2.5.9)

[Keith Owens]

On Fri, 17 May 2002 15:01:07 -0700, 
Matthew Dobson <colpatch at us.ibm.com> wrote:
>Keith Owens wrote:
>> 
>> On Wed, 15 May 2002 18:03:29 -0700,
>> Patricia Gaughen <gone at us.ibm.com> wrote:
>> >2.5.9 on an 8 proc numaq box.  I saw the recent patch from Ethan Solomita and
>> >I'll give it a try tonight or tomorrow.  But we've ran into a couple of issues:
>> >
>> >       - when the system hangs we enter kdb but using bt, bta and btp do not produce
>> >stacks for any of the processes.  We're able to get the stacks manually, but
>> >this is not much fun :-)
>> 
>> Which version of gcc?  Newer versions of gcc produce stack frame code
>> that kdb cannot backtrace without CONFIG_FRAME_POINTER=y.
>I'm currently using gcc version 3.0.2.  And I definitely do have
>CONFIG_FRAME_POINTER turned on.

Any error messages?  I am guessing that it says "Stack is not in
task_struct, backtrace not available".  task_struct data has been moved
around in recent 2.5 kernels and kdb has not been changed to validate
the new layout yet.