diff options
Diffstat (limited to 'kernel/trace/Kconfig')
| -rw-r--r-- | kernel/trace/Kconfig | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index bde6f03512d5..e2a4ff6fc3a6 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -244,16 +244,21 @@ config STACK_TRACER This tracer works by hooking into every function call that the kernel executes, and keeping a maximum stack depth value and - stack-trace saved. Because this logic has to execute in every - kernel function, all the time, this option can slow down the - kernel measurably and is generally intended for kernel - developers only. + stack-trace saved. If this is configured with DYNAMIC_FTRACE + then it will not have any overhead while the stack tracer + is disabled. + + To enable the stack tracer on bootup, pass in 'stacktrace' + on the kernel command line. + + The stack tracer can also be enabled or disabled via the + sysctl kernel.stack_tracer_enabled Say N if unsure. -config BTS_TRACER +config HW_BRANCH_TRACER depends on HAVE_HW_BRANCH_TRACER - bool "Trace branches" + bool "Trace hw branches" select TRACING help This tracer records all branches on the system in a circular |