Re: [PATCH V3 07/11] notifiers: Add tracepoints to the notifiers infrastructure

[Guilherme G. Piccoli]

On 19/08/2022 19:17, Guilherme G. Piccoli wrote:
> Currently there is no way to show the callback names for registered,
> unregistered or executed notifiers. This is very useful for debug
> purposes, hence add this functionality here in the form of notifiers'
> tracepoints, one per operation.
> 
> Cc: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
> Cc: Cong Wang <xiyou.wangcong@xxxxxxxxx>
> Cc: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
> Cc: Valentin Schneider <valentin.schneider@xxxxxxx>
> Cc: Xiaoming Ni <nixiaoming@xxxxxxxxxx>
> Signed-off-by: Guilherme G. Piccoli <gpiccoli@xxxxxxxxxx>
> 
> ---
> 
> V3:
> - Yet another major change - thanks to Arjan's great suggestion,
> refactored the code to make use of tracepoints instead of guarding
> the output with a Kconfig debug setting.
> 
> V2:
> - Major improvement thanks to the great idea from Xiaoming - changed
> all the ksym wheel reinvention to printk %ps modifier;
> 
> - Instead of ifdefs, using IS_ENABLED() - thanks Steven.
> 
> - Removed an unlikely() hint on debug path.
> 
> 
>  include/trace/events/notifiers.h | 69 ++++++++++++++++++++++++++++++++
>  kernel/notifier.c                |  6 +++
>  2 files changed, 75 insertions(+)
>  create mode 100644 include/trace/events/notifiers.h
> 

Hi Arjan / Xiaoming / all, monthly ping heh

If there's any advice on how to move things here, I would appreciate!
Thanks in advance and apologies for the re-pings.

Cheers,


Guilherme