2012/10/18 Lei Wen <leiwen(a)marvell.com>:
 While I am trying to do similar thing in my patch, exacting the
 registers from thread_info, instead of crash_note for those not
 running task, I just could get the first unwind function, then it
 failed. Do you have any idea for why?  The unwind goes normally for
 the panic task. 
No idea from the top of my head.
 Also I see your "gdb bt" would always fails at below
message, is there
 method to provide the cpsr for the not running task? 
I haven't really looked into this, sorry.
Rabin