Re: [PATCH] of: introduce event tracepoints for dynamic device_node lifecyle

[Steven Rostedt]

On Wed, 19 Apr 2017 22:24:58 -0700
Tyrel Datwyler <turtle.in.the.kernel@xxxxxxxxx> wrote:

> On 04/19/2017 07:33 PM, Steven Rostedt wrote:
> > On Wed, 19 Apr 2017 16:27:10 -0700
> > Tyrel Datwyler <turtle.in.the.kernel@xxxxxxxxx> wrote:
> >   
> >> # echo stacktrace > /sys/kernel/debug/tracing/trace_options
> >> # cat trace | grep -A6 "/pci@800000020000018"  
> > 
> > Just to let you know that there is now stacktrace event triggers, where
> > you don't need to stacktrace all events, you can pick and choose. And
> > even filter the stack trace on specific fields of the event.  
> 
> This is great, and I did figure that out this afternoon. One thing I was
> still trying to determine though was whether its possible to set these
> triggers at boot? As far as I could tell I'm still limited to
> "trace_options=stacktrace" as a kernel boot parameter to get the stack
> for event tracepoints.

No not yet. But I'll add that to the todo list.

Thanks,

-- Steve