Messages in this thread | | | Date | Wed, 20 Aug 2014 10:19:53 +0200 | From | Ethan Wilson <> | Subject | (trying again) how to get kernel stack trace if process not blocked? |
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Hello list, I know cat /proc/pid/stack shows the kernel call stack of a process, and this is so good, but it will show just 0xffffffffffffffff if the process is running in kernel space and not blocked (sleeping).
It would be *very* useful to get the kernel stack trace for a running process, even if imprecise, or at least knowing the name of the kernel function executing now (top of the stack). Why is it not doable?
I tried to disable CONFIG_SCHED_OMIT_FRAME_POINTER but it didn't allow to print the stack from /proc/pid/stack anyway. What is the benefit of disabling such kernel option (i.e. having the frame pointer)?
I guessed that maybe with EIP from /proc/pid/stat it is possible to do something like that but I can't find much information on how to do that.
Thanks for any information EW
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