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Subject[tip:tracing/urgent] tracing/fastboot: Document the need of initcall_debug
Commit-ID:  238a24f626628cb16a3015f332d649f08246ca89
Gitweb: http://git.kernel.org/tip/238a24f626628cb16a3015f332d649f08246ca89
Author: Li Zefan <lizf@cn.fujitsu.com>
AuthorDate: Mon, 29 Jun 2009 15:55:10 +0800
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Mon, 29 Jun 2009 10:22:10 +0200

tracing/fastboot: Document the need of initcall_debug

To use boot tracer, one should pass initcall_debug as well as
ftrace=initcall to the command line.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <4A48735E.9050002@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>


---
kernel/trace/Kconfig | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 1551f47..019f380 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -226,13 +226,13 @@ config BOOT_TRACER
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
+ 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.

- You must pass in ftrace=initcall to the kernel command line
- to enable this on bootup.
+ You must pass in initcall_debug and ftrace=initcall to the kernel
+ command line to enable this on bootup.

config TRACE_BRANCH_PROFILING
bool

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