Re: [PATCH v2] workqueue: add function in event of workqueue_activate_work

[Kassey Li]

On 2024/3/8 10:23, Steven Rostedt wrote:
> On Fri, 8 Mar 2024 10:18:18 +0800
> Kassey Li <quic_yingangl@xxxxxxxxxxx> wrote:
>
> > The trace event "workqueue_activate_work" only print work struct.
> > However, function is the region of interest in a full sequence of work.
> > Current workqueue_activate_work trace event output:
> >
> >      workqueue_activate_work: work struct ffffff88b4a0f450
> >
> > With this change, workqueue_activate_work will print the function name,
> > align with workqueue_queue_work/execute_start/execute_end event.
> >
> >      workqueue_activate_work: work struct ffffff80413a78b8 function=vmstat_update
> >
> > Signed-off-by: Kassey Li <quic_yingangl@xxxxxxxxxxx>
> > ---
> > Changelog:
> > v1: https://lore.kernel.org/all/20240308010929.1955339-1-quic_yingangl@xxxxxxxxxxx/
> > v1->v2:
> > - do not follow checkpatch in TRACE_EVENT() macros
> > - add sample "workqueue_activate_work: work struct ffffff80413a78b8 function=vmstat_update"
>
>  From a tracing POV,
>
> Reviewed-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
>
> -- Steve

thank you Steve.

add Tejun to review this change.

> > ---
> >   include/trace/events/workqueue.h | 4 +++-
> >   1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/include/trace/events/workqueue.h b/include/trace/events/workqueue.h
> > index 262d52021c23..6ef5b7254070 100644
> > --- a/include/trace/events/workqueue.h
> > +++ b/include/trace/events/workqueue.h
> > @@ -64,13 +64,15 @@ TRACE_EVENT(workqueue_activate_work,
> >   
> >   	TP_STRUCT__entry(
> >   		__field( void *,	work	)
> > +		__field( void *,	function)
> >   	),
> >   
> >   	TP_fast_assign(
> >   		__entry->work		= work;
> > +		__entry->function	= work->func;
> >   	),
> >   
> > -	TP_printk("work struct %p", __entry->work)
> > +	TP_printk("work struct %p function=%ps ", __entry->work, __entry->function)
> >   );
> >   
> >   /**