From: Ingo Molnar Date: Tue, 14 Oct 2008 12:15:43 +0000 (+0200) Subject: tracing/stacktrace: improve help text X-Git-Tag: v2.6.28-rc1~78^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4519d9e54dcd273975ad0adebad2a08c20428029;p=platform%2Fkernel%2Flinux-3.10.git tracing/stacktrace: improve help text Improve the help text that is displayed for CONFIG_STACK_TRACER. Signed-off-by: Ingo Molnar --- diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index 396aea1..11fd03a 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"