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

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Date:	Tue, 04 May 2010 13:36:35 -0500
From:	Larry Finger <Larry.Finger@...inger.net>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: How to write marker info in MMIO trace from kernel

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.

Thanks,

Larry
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