linux-kernel - Re: [PATCH 0/3] tracing: make tp_printk work on syscall tracepoints

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Date:   Fri, 8 Apr 2022 22:21:18 +0800
From:   Jeff Xie <xiehuan09@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     mingo@...hat.com, Masami Hiramatsu <mhiramat@...nel.org>,
        Tom Zanussi <zanussi@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/3] tracing: make tp_printk work on syscall tracepoints

Hi,

Anyone have any suggestions for this patch series? ;-)

On Wed, Mar 30, 2022 at 12:39 AM Jeff Xie <xiehuan09@...il.com> wrote:
>
> Currently the tp_printk option has no effect on syscall tracepoint.
> When adding the kernel option parameter tp_printk, then:
>
> echo 1 > /sys/kernel/debug/tracing/events/syscalls/enable
>
> When running any application, no trace information is printed on the
> terminal.
>
> Now added printk for syscall tracepoints.
>
> Jeff Xie (3):
>   tracing: make tracepoint_iter_lock public
>   tracing: make tracepoint_printk_key public
>   tracing: make tp_printk work on syscall tracepoints
>
>  kernel/trace/trace.c          |  4 ++--
>  kernel/trace/trace.h          |  2 ++
>  kernel/trace/trace_syscalls.c | 25 +++++++++++++++++++++++++
>  3 files changed, 29 insertions(+), 2 deletions(-)
>
> --
> 2.25.1
>
---
JeffXie