linux-kernel - Re: [PATCH] tracing/fastboot: document the need of initcall

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Message-ID: <20090629091422.GA9724@elte.hu>
Date:	Mon, 29 Jun 2009 11:14:22 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tracing/fastboot: document the need of initcall_debug


* Li Zefan <lizf@...fujitsu.com> wrote:

> Ingo Molnar wrote:
> > * Li Zefan <lizf@...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?

That's reasonable indeed.

	Ingo
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