kgdb on kernel 2.6.14

Hi,

I am trying to use kgdb to debug one of our custom kernel module.

I am using standard kernel 2.6.14 and kgdb-2-2.6.14. Development and
target machines are dual processors machines (DELL 2450). I attach the
config file of the target machine.
(I am not using kgdbwait in grub because in this case, I get an error E22)

I can sometimes connect remotely to the target machine via gdb (using
target remote /dev/ttyS0) and debug but sometimes it does not work
I think it is related to the messages I get :

- NMI received for unknown reason 21 on CPU 0
Dazed and confused, but trying to continue
Do you have a strange power saving mode enabled?

- Not all CPUs have been synced for KGDB

I would be grateful for any advice
Thanks
Regards

Elise

.config
Description: Text document