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

From	Tyrel Datwyler <turtle.in.the.kernel@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] of: introduce event tracepoints for dynamic device_node lifecyle
Date	2017-04-20 07:30 +0200
Message-ID	<tycPg-4PM-3@gated-at.bofh.it> (permalink)
References	<txplv-7EF-1@gated-at.bofh.it> <txLm2-4su-3@gated-at.bofh.it> <txML7-5kl-1@gated-at.bofh.it> <ty7cR-1dY-15@gated-at.bofh.it> <tyaaJ-3bq-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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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@gmail.com> 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.

-Tyrel

> 
>  # cd /sys/kernel/debug/tracing
>  # echo "stacktrace if common_pid == $$ && reason == 3" \
>    > events/tlb/tlb_flush/trigger
> 
>  # cat trace
>             bash-1103  [003] ...1  1290.100133: tlb_flush: pages:-1 reason:local mm shootdown (3)
>             bash-1103  [003] ...2  1290.100140: <stack trace>
>  => copy_process.part.39
>  => _do_fork
>  => SyS_clone
>  => do_syscall_64
>  => return_from_SYSCALL_64
> 
> -- Steve
>

Thread

[PATCH] of: introduce event tracepoints for dynamic device_node lifecyle Tyrel Datwyler <tyreld@linux.vnet.ibm.com> - 2017-04-18 02:40 +0200
  Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Tyrel Datwyler <tyreld@linux.vnet.ibm.com> - 2017-04-18 02:40 +0200
  Re: [PATCH] of: introduce event tracepoints for dynamic device_node lifecyle Rob Herring <robh+dt@kernel.org> - 2017-04-18 18:50 +0200
    Re: [PATCH] of: introduce event tracepoints for dynamic device_node lifecyle "Oliver O'Halloran" <oohall@gmail.com> - 2017-04-19 04:40 +0200
      Re: [PATCH] of: introduce event tracepoints for dynamic device_node lifecyle Michael Ellerman <mpe@ellerman.id.au> - 2017-04-19 12:20 +0200
        Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Tyrel Datwyler <tyreld@linux.vnet.ibm.com> - 2017-04-19 23:20 +0200
  Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Frank Rowand <frowand.list@gmail.com> - 2017-04-19 02:10 +0200
    Re: [PATCH] of: introduce event tracepoints for dynamic device_node lifecyle Michael Ellerman <mpe@ellerman.id.au> - 2017-04-19 03:40 +0200
      Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Frank Rowand <frowand.list@gmail.com> - 2017-04-19 04:40 +0200
        Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Tyrel Datwyler <tyreld@linux.vnet.ibm.com> - 2017-04-19 20:40 +0200
      Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Tyrel Datwyler <turtle.in.the.kernel@gmail.com> - 2017-04-20 01:30 +0200
        Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Steven Rostedt <rostedt@goodmis.org> - 2017-04-20 04:40 +0200
          Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Frank Rowand <frowand.list@gmail.com> - 2017-04-20 06:50 +0200
          Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Tyrel Datwyler <turtle.in.the.kernel@gmail.com> - 2017-04-20 07:30 +0200
            Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Steven Rostedt <rostedt@goodmis.org> - 2017-04-20 15:40 +0200
        Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Frank Rowand <frowand.list@gmail.com> - 2017-04-20 06:50 +0200
          Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Frank Rowand <frowand.list@gmail.com> - 2017-04-20 07:20 +0200
          Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Tyrel Datwyler <turtle.in.the.kernel@gmail.com> - 2017-04-20 19:00 +0200
            Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Frank Rowand <frowand.list@gmail.com> - 2017-04-20 21:40 +0200
              Re: [PATCH] of: introduce event tracepoints for dynamic device_node lifecyle Michael Ellerman <mpe@ellerman.id.au> - 2017-04-21 04:00 +0200
    Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Frank Rowand <frowand.list@gmail.com> - 2017-04-19 03:50 +0200
      Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Steven Rostedt <rostedt@goodmis.org> - 2017-04-19 05:00 +0200
        Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Tyrel Datwyler <tyreld@linux.vnet.ibm.com> - 2017-04-19 20:50 +0200
          Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Frank Rowand <frowand.list@gmail.com> - 2017-04-20 04:40 +0200
            Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Frank Rowand <frowand.list@gmail.com> - 2017-04-20 12:50 +0200
    Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Steven Rostedt <rostedt@goodmis.org> - 2017-04-19 04:50 +0200
      Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Frank Rowand <frowand.list@gmail.com> - 2017-04-19 05:20 +0200
  Re: [PATCH] of: introduce event tracepoints for dynamic device_node  lifecyle Frank Rowand <frowand.list@gmail.com> - 2017-04-19 19:50 +0200

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