On 04/18/17 19:46, Steven Rostedt wrote:

On Tue, 18 Apr 2017 17:07:17 -0700
Frank Rowand [off-list ref] wrote:

quoted

As far as I know, there is no easy way to combine trace data and printk()
style data to create a single chronology of events.  If some of the
information needed to debug an issue is trace data and some is printk()
style data then it becomes more difficult to understand the overall
situation.

You mean like:

 # echo 1 > /sys/kernel/debug/tracing/events/printk/console/enable

Makes all printks also go into the ftrace ring buffer.

Thanks!  I was hoping there was going to be an easy answer like this.

-- Steve

quoted

If Rob wants to convert printk() style data to trace data (and I can't
convince him otherwise) then I will have further comments on this specific
patch.

.