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-rw-r--r--kernel/trace/Kconfig64
1 files changed, 63 insertions, 1 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 263e9e6..1cb3e1f 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -1,23 +1,37 @@
#
# Architectures that offer an FTRACE implementation should select HAVE_FTRACE:
#
+
+config NOP_TRACER
+ bool
+
config HAVE_FTRACE
bool
+ select NOP_TRACER
config HAVE_DYNAMIC_FTRACE
bool
+config HAVE_FTRACE_MCOUNT_RECORD
+ bool
+
config TRACER_MAX_TRACE
bool
+config RING_BUFFER
+ bool
+
config TRACING
bool
select DEBUG_FS
+ select RING_BUFFER
select STACKTRACE
+ select TRACEPOINTS
config FTRACE
bool "Kernel Function Tracer"
depends on HAVE_FTRACE
+ depends on DEBUG_KERNEL
select FRAME_POINTER
select TRACING
select CONTEXT_SWITCH_TRACER
@@ -36,6 +50,7 @@ config IRQSOFF_TRACER
depends on TRACE_IRQFLAGS_SUPPORT
depends on GENERIC_TIME
depends on HAVE_FTRACE
+ depends on DEBUG_KERNEL
select TRACE_IRQFLAGS
select TRACING
select TRACER_MAX_TRACE
@@ -59,6 +74,7 @@ config PREEMPT_TRACER
depends on GENERIC_TIME
depends on PREEMPT
depends on HAVE_FTRACE
+ depends on DEBUG_KERNEL
select TRACING
select TRACER_MAX_TRACE
help
@@ -86,6 +102,7 @@ config SYSPROF_TRACER
config SCHED_TRACER
bool "Scheduling Latency Tracer"
depends on HAVE_FTRACE
+ depends on DEBUG_KERNEL
select TRACING
select CONTEXT_SWITCH_TRACER
select TRACER_MAX_TRACE
@@ -96,16 +113,56 @@ config SCHED_TRACER
config CONTEXT_SWITCH_TRACER
bool "Trace process context switches"
depends on HAVE_FTRACE
+ depends on DEBUG_KERNEL
select TRACING
select MARKERS
help
This tracer gets called from the context switch and records
all switching of tasks.
+config BOOT_TRACER
+ bool "Trace boot initcalls"
+ depends on HAVE_FTRACE
+ depends on DEBUG_KERNEL
+ select TRACING
+ help
+ This tracer helps developers to optimize boot times: it records
+ the timings of the initcalls and traces key events and the identity
+ of tasks that can cause boot delays, such as context-switches.
+
+ Its aim is to be parsed by the /scripts/bootgraph.pl tool to
+ produce pretty graphics about boot inefficiencies, giving a visual
+ representation of the delays during initcalls - but the raw
+ /debug/tracing/trace text output is readable too.
+
+ ( Note that tracing self tests can't be enabled if this tracer is
+ selected, because the self-tests are an initcall as well and that
+ would invalidate the boot trace. )
+
+config STACK_TRACER
+ bool "Trace max stack"
+ depends on HAVE_FTRACE
+ depends on DEBUG_KERNEL
+ select FTRACE
+ select STACKTRACE
+ help
+ This special tracer records the maximum stack footprint of the
+ kernel and displays it in debugfs/tracing/stack_trace.
+
+ 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.
+
+ Say N if unsure.
+
config DYNAMIC_FTRACE
bool "enable/disable ftrace tracepoints dynamically"
depends on FTRACE
depends on HAVE_DYNAMIC_FTRACE
+ depends on DEBUG_KERNEL
default y
help
This option will modify all the calls to ftrace dynamically
@@ -121,12 +178,17 @@ config DYNAMIC_FTRACE
were made. If so, it runs stop_machine (stops all CPUS)
and modifies the code to jump over the call to ftrace.
+config FTRACE_MCOUNT_RECORD
+ def_bool y
+ depends on DYNAMIC_FTRACE
+ depends on HAVE_FTRACE_MCOUNT_RECORD
+
config FTRACE_SELFTEST
bool
config FTRACE_STARTUP_TEST
bool "Perform a startup test on ftrace"
- depends on TRACING
+ depends on TRACING && DEBUG_KERNEL && !BOOT_TRACER
select FTRACE_SELFTEST
help
This option performs a series of startup tests on ftrace. On bootup
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