From: Namhyung Kim <namhyung@kernel.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Tom Zanussi <tom.zanussi@linux.intel.com>,
Clark Williams <williams@redhat.com>,
Karim Yaghmour <karim.yaghmour@opersys.com>,
Brendan Gregg <bgregg@netflix.com>,
Joel Fernandes <joelaf@google.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
linux-rt-users@vger.kernel.org, kernel-team@lge.com
Subject: Re: [RFC][PATCH 06/10] tracing: Add trigger file for trace_markers tracefs/ftrace/print
Date: Mon, 14 May 2018 12:13:22 +0900 [thread overview]
Message-ID: <20180514031322.GB9220@sejong> (raw)
In-Reply-To: <20180511195340.876528094@goodmis.org>
On Fri, May 11, 2018 at 03:49:33PM -0400, Steven Rostedt wrote:
> From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
>
> Allow writing to the trace_markers file initiate triggers defined in
> tracefs/ftrace/print/trigger file. This will allow of user space to trigger
> the same type of triggers (including histograms) that the trace events use.
>
> Cc: Tom Zanussi <tom.zanussi@linux.intel.com>
> Cc: Clark Williams <williams@redhat.com>
> Cc: Karim Yaghmour <karim.yaghmour@opersys.com>
> Cc: Brendan Gregg <bgregg@netflix.com>
> Suggested-by: Joel Fernandes <joelaf@google.com>
> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
> ---
[SNIP]
> diff --git a/kernel/trace/trace_entries.h b/kernel/trace/trace_entries.h
> index e3a658bac10f..de3fce14cd00 100644
> --- a/kernel/trace/trace_entries.h
> +++ b/kernel/trace/trace_entries.h
> @@ -230,7 +230,7 @@ FTRACE_ENTRY(bprint, bprint_entry,
> FILTER_OTHER
> );
>
> -FTRACE_ENTRY(print, print_entry,
> +FTRACE_ENTRY_REG(print, print_entry,
>
> TRACE_PRINT,
>
> @@ -242,7 +242,9 @@ FTRACE_ENTRY(print, print_entry,
> F_printk("%ps: %s",
> (void *)__entry->ip, __entry->buf),
>
> - FILTER_OTHER
> + FILTER_OTHER,
> +
> + ftrace_event_register
I wonder this is still needed since you added __find_event_file()
which ignores the reg field. Maybe I'm missing something..
Anyway it looks whitespace damaged.
Thanks,
Namhyung
> );
>
> FTRACE_ENTRY(raw_data, raw_data_entry,
> diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
> index d842f1eadfe5..45630a76ed3a 100644
> --- a/kernel/trace/trace_export.c
> +++ b/kernel/trace/trace_export.c
> @@ -14,6 +14,13 @@
>
> #include "trace_output.h"
>
> +/* Stub function for events with triggers */
> +static int ftrace_event_register(struct trace_event_call *call,
> + enum trace_reg type, void *data)
> +{
> + return 0;
> +}
> +
> #undef TRACE_SYSTEM
> #define TRACE_SYSTEM ftrace
>
> --
> 2.17.0
>
>
next prev parent reply other threads:[~2018-05-14 3:13 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-11 19:49 [RFC][PATCH 00/10] tracing: Add triggers to trace_marker writes Steven Rostedt
2018-05-11 19:49 ` [RFC][PATCH 01/10] tracing: Do not reference event data in post call triggers Steven Rostedt
2018-05-12 12:04 ` Masami Hiramatsu
2018-05-11 19:49 ` [RFC][PATCH 02/10] tracing: Add __find_event_file() to find event files without restrictions Steven Rostedt
2018-05-11 19:49 ` [RFC][PATCH 03/10] tracing: Have event_trace_init() called by trace_init_tracefs() Steven Rostedt
2018-05-11 19:49 ` [RFC][PATCH 04/10] tracing: Add brackets in ftrace event dynamic arrays Steven Rostedt
2018-05-11 19:49 ` [RFC][PATCH 05/10] tracing: Do not show filter file for ftrace internal events Steven Rostedt
2018-05-11 19:49 ` [RFC][PATCH 06/10] tracing: Add trigger file for trace_markers tracefs/ftrace/print Steven Rostedt
2018-05-14 3:13 ` Namhyung Kim [this message]
2018-05-14 15:04 ` Steven Rostedt
2018-05-16 7:49 ` Namhyung Kim
2018-05-16 10:37 ` Steven Rostedt
2018-05-11 19:49 ` [RFC][PATCH 07/10] tracing: Have zero size length in filter logic be full string Steven Rostedt
2018-05-12 12:40 ` Masami Hiramatsu
2018-05-12 17:27 ` Steven Rostedt
2018-05-12 18:32 ` Yann Ylavic
2018-05-14 2:23 ` Namhyung Kim
2018-05-14 14:12 ` Steven Rostedt
2018-05-11 19:49 ` [RFC][PATCH 08/10] tracing: Prevent further users of zero size static arrays in trace events Steven Rostedt
2018-05-11 19:49 ` [RFC][PATCH 09/10] tracing: Allow histogram triggers to access ftrace internal events Steven Rostedt
2018-05-11 19:49 ` [RFC][PATCH 10/10] tracing: Document trace_marker triggers Steven Rostedt
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180514031322.GB9220@sejong \
--to=namhyung@kernel.org \
--cc=akpm@linux-foundation.org \
--cc=bgregg@netflix.com \
--cc=joelaf@google.com \
--cc=karim.yaghmour@opersys.com \
--cc=kernel-team@lge.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rt-users@vger.kernel.org \
--cc=mhiramat@kernel.org \
--cc=mingo@kernel.org \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
--cc=tom.zanussi@linux.intel.com \
--cc=williams@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).