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Date: Mon, 29 Jun 2009 17:01:56 +0800
From: Li Zefan <lizf@cn.fujitsu.com>
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To: Ingo Molnar <mingo@elte.hu>
CC: Frederic Weisbecker <fweisbec@gmail.com>,
       Steven Rostedt <rostedt@goodmis.org>,
       LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] tracing/fastboot: document the need of initcall_debug
References: <4A48735E.9050002@cn.fujitsu.com> <20090629082152.GA2921@elte.hu>
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Ingo Molnar wrote:
> * Li Zefan <lizf@cn.fujitsu.com> wrote:
> 
>> To use boot tracer, one should pass initcall_debug as well as
>> ftrace=initcall to the command line.
> 
> I think both should be auto-enabled if BOOT_TRACER is enabled, for 
> ease of use - agreed?
> 

If both are auto-enabled, we'll always do boot tracing. But we want
BOOT_TRACER to be enabled and only enable boot tracing when it's needed.

But maybe we can make ftrace=initcall implies initcall_debug=1?