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authorIngo Molnar <mingo@elte.hu>2008-10-14 14:15:43 +0200
committerIngo Molnar <mingo@elte.hu>2008-10-14 14:15:43 +0200
commit4519d9e54dcd273975ad0adebad2a08c20428029 (patch)
treeb106b3a33908d2ca91c80efa54b60d9b1bd87df9 /kernel/trace
parent07d1890420cce95c577736e4d67f70cbd39845fe (diff)
downloadblackbird-op-linux-4519d9e54dcd273975ad0adebad2a08c20428029.tar.gz
blackbird-op-linux-4519d9e54dcd273975ad0adebad2a08c20428029.zip
tracing/stacktrace: improve help text
Improve the help text that is displayed for CONFIG_STACK_TRACER. Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/Kconfig13
1 files changed, 11 insertions, 2 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 396aea11398e..11fd03a429f0 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -141,8 +141,17 @@ config STACK_TRACER
select FTRACE
select STACKTRACE
help
- This tracer records the max stack of the kernel, and displays
- it in debugfs/tracing/stack_trace
+ 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"
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