Subject: Re: [PATCH 1/8] SGI x86_64 UV: Add limit console output function
From: Steven Rostedt <rostedt@goodmis.org>
Reply-To: rostedt@goodmis.org
To: Mike Travis <travis@sgi.com>
Cc: Andi Kleen <andi@firstfloor.org>, Ingo Molnar <mingo@elte.hu>,
       Thomas Gleixner <tglx@linutronix.de>,
       Andrew Morton <akpm@linux-foundation.org>,
       Jack Steiner <steiner@sgi.com>, Randy Dunlap <rdunlap@xenotime.net>,
       Greg Kroah-Hartman <gregkh@suse.de>,
       Frederic Weisbecker <fweisbec@gmail.com>,
       Heiko Carstens <heiko.carstens@de.ibm.com>,
       Robin Getz <rgetz@analog.com>, Dave Young <hidave.darkstar@gmail.com>,
       linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org
In-Reply-To: <4AE5E4D3.6060404@sgi.com>
References: <20091023233743.439628000@alcatraz.americas.sgi.com>
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	 <87tyxmy6x6.fsf@basil.nowhere.org>
	 <1256573457.26028.313.camel@gandalf.stny.rr.com> <4AE5E4D3.6060404@sgi.com>
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Organization: Kihon Technologies Inc.
Date: Mon, 26 Oct 2009 14:51:09 -0400
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On Mon, 2009-10-26 at 11:05 -0700, Mike Travis wrote:

> I haven't heard of "trace_printk" but how does this differ from the
> existing kernel log buffer you get with 'dmesg'?
> 

It goes into the ftrace ring buffer and does not print to console. Nor
does it print to dmesg. Currently you need to read ftrace (via the
debugfs) to get to it. Or a sysrq-z will print it out to the console.

-- Steve


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