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tracing: Have stack tracing set filtered functions at boot

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Add stacktrace_filter= to the kernel command line that lets
the user pick specific functions to check the stack on.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt
2011-12-19 22:01:00 -05:00
committed by Steven Rostedt
parent 2a85a37f16
commit 762e120788
2 changed files with 19 additions and 0 deletions
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8
Documentation/kernel-parameters.txt
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@@ -2435,6 +2435,14 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
stacktrace [FTRACE]
Enabled the stack tracer on boot up.
stacktrace_filter=[function-list]
[FTRACE] Limit the functions that the stack tracer
will trace at boot up. function-list is a comma separated
list of functions. This list can be changed at run
time by the stack_trace_filter file in the debugfs
tracing directory. Note, this enables stack tracing
and the stacktrace above is not needed.
sti= [PARISC,HW]
Format: <num>
Set the STI (builtin display/keyboard on the HP-PARISC