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-rw-r--r--kernel/trace/Kconfig22
1 files changed, 17 insertions, 5 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 4d4eb15cc7fd..036cec1fcd24 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -82,6 +82,15 @@ config RING_BUFFER_ALLOW_SWAP
Allow the use of ring_buffer_swap_cpu.
Adds a very slight overhead to tracing when enabled.
+config PREEMPTIRQ_TRACEPOINTS
+ bool
+ depends on TRACE_PREEMPT_TOGGLE || TRACE_IRQFLAGS
+ select TRACING
+ default y
+ help
+ Create preempt/irq toggle tracepoints if needed, so that other parts
+ of the kernel can use them to generate or add hooks to them.
+
# All tracer options should select GENERIC_TRACER. For those options that are
# enabled by all tracers (context switch and event tracer) they select TRACING.
# This allows those options to appear when no other tracer is selected. But the
@@ -155,18 +164,20 @@ config FUNCTION_GRAPH_TRACER
the return value. This is done by setting the current return
address on the current task structure into a stack of calls.
+config TRACE_PREEMPT_TOGGLE
+ bool
+ help
+ Enables hooks which will be called when preemption is first disabled,
+ and last enabled.
config PREEMPTIRQ_EVENTS
bool "Enable trace events for preempt and irq disable/enable"
select TRACE_IRQFLAGS
- depends on DEBUG_PREEMPT || !PROVE_LOCKING
- depends on TRACING
+ select TRACE_PREEMPT_TOGGLE if PREEMPT
+ select GENERIC_TRACER
default n
help
Enable tracing of disable and enable events for preemption and irqs.
- For tracing preempt disable/enable events, DEBUG_PREEMPT must be
- enabled. For tracing irq disable/enable events, PROVE_LOCKING must
- be disabled.
config IRQSOFF_TRACER
bool "Interrupts-off Latency Tracer"
@@ -203,6 +214,7 @@ config PREEMPT_TRACER
select RING_BUFFER_ALLOW_SWAP
select TRACER_SNAPSHOT
select TRACER_SNAPSHOT_PER_CPU_SWAP
+ select TRACE_PREEMPT_TOGGLE
help
This option measures the time spent in preemption-off critical
sections, with microsecond accuracy.