Re: [PATCH 0/3] powerpc/ftrace: Enable HAVE_FUNCTION_GRAPH_RET_ADDR_PTR

[Nicholas Piggin]

Naveen N. Rao's on September 6, 2019 4:20 am:
> Enable HAVE_FUNCTION_GRAPH_RET_ADDR_PTR for more robust stack unwinding 
> when function graph tracer is in use. Convert powerpc show_stack() to 
> use ftrace_graph_ret_addr() for better stack unwinding.

This series improved my case of a WARN_ON triggering in 
trace_graph_return, the last return_to_handler entry in the stack
dump has the caller in parenthesis rather than return_to_handler.

It gives the caller, it would be nice if it could output the actual
function being traced, and then continue the caller. But at least
this is a significant improvement. Thanks for the quick turnaround.

Tested-by: Nicholas Piggin <npiggin@xxxxxxxxx>