linux-kernel - Re: How to write marker info in MMIO trace from kernel

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Date:	Tue, 04 May 2010 14:42:59 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Larry Finger <Larry.Finger@...inger.net>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: How to write marker info in MMIO trace from kernel

On Tue, 2010-05-04 at 13:36 -0500, Larry Finger wrote:
> Stephen,
> 
> I hope you are the correct person for this question.
> 
> I would like to write information into the MMIO trace file similar to
> what the user space write to /sys/.../trace_marker would accomplish,
> however, I want to do it in place of printk statements in the driver I'm
> tracing. Do you have any suggestions on how to do this? I have tools to
> merge the trace dump with dmesg output, but the latter lags behind and I
> do not get good correlation.

You can use "trace_printk()". I think that is what you are looking for.

-- Steve


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