On Thu, 11 Feb 2016 14:56:32 +0100, Ricardo Ribalda Delgado said:

quoted

What problem are you trying to solve by getting a trace of everything? (Hint -
what meaning does a userspace stack traceback have if you're looking at
the corresponding kernel stack trace?)

I was doing:

cat /dev/video0

And the open()  syscall sometimes was stalling.

I wanted to know at what place open() syscall was waiting...

You can find *that* out by doing  a 'cat /proc/NNNN/stack' for NNNN == process id.

No need to find *all* the stack traces for that. :)
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