From: tip-bot for Li Zefan <lizf@cn.fujitsu.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@redhat.com,
tzanussi@gmail.com, lizf@cn.fujitsu.com, fweisbec@gmail.com,
rostedt@goodmis.org, tglx@linutronix.de, mingo@elte.hu
Subject: [tip:tracing/core] tracing/events: make struct trace_entry->type to be int type
Date: Wed, 22 Apr 2009 10:06:46 GMT [thread overview]
Message-ID: <tip-7a4f453b6d7379a7c380825949977c5a838aa012@git.kernel.org> (raw)
In-Reply-To: <49EEDB0E.5070207@cn.fujitsu.com>
Commit-ID: 7a4f453b6d7379a7c380825949977c5a838aa012
Gitweb: http://git.kernel.org/tip/7a4f453b6d7379a7c380825949977c5a838aa012
Author: Li Zefan <lizf@cn.fujitsu.com>
AuthorDate: Wed, 22 Apr 2009 16:53:34 +0800
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Wed, 22 Apr 2009 11:36:38 +0200
tracing/events: make struct trace_entry->type to be int type
struct trace_entry->type is unsigned char, while trace event's id is
int type, thus for a event with id >= 256, it's entry->type is cast
to (id % 256), and then we can't see the trace output of this event.
# insmod trace-events-sample.ko
# echo foo_bar > /mnt/tracing/set_event
# cat /debug/tracing/events/trace-events-sample/foo_bar/id
256
# cat /mnt/tracing/trace_pipe
<...>-3548 [001] 215.091142: Unknown type 0
<...>-3548 [001] 216.089207: Unknown type 0
<...>-3548 [001] 217.087271: Unknown type 0
<...>-3548 [001] 218.085332: Unknown type 0
[ Impact: fix output for trace events with id >= 256 ]
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <49EEDB0E.5070207@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
include/linux/ftrace_event.h | 4 ++--
include/trace/ftrace.h | 2 +-
kernel/trace/trace.c | 4 ++--
kernel/trace/trace.h | 2 +-
kernel/trace/trace_events.c | 2 +-
5 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index 75f3ac0..2a4a407 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -16,7 +16,7 @@ struct dentry;
* bash-15816 [01] 235.197585: idle_cpu <- irq_enter
*/
struct trace_entry {
- unsigned char type;
+ int type;
unsigned char flags;
unsigned char preempt_count;
int pid;
@@ -73,7 +73,7 @@ enum print_line_t {
struct ring_buffer_event *
-trace_current_buffer_lock_reserve(unsigned char type, unsigned long len,
+trace_current_buffer_lock_reserve(int type, unsigned long len,
unsigned long flags, int pc);
void trace_current_buffer_unlock_commit(struct ring_buffer_event *event,
unsigned long flags, int pc);
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 39a3351..15ef08d 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -198,7 +198,7 @@ ftrace_define_fields_##call(void) \
struct ftrace_event_call *event_call = &event_##call; \
int ret; \
\
- __common_field(unsigned char, type); \
+ __common_field(int, type); \
__common_field(unsigned char, flags); \
__common_field(unsigned char, preempt_count); \
__common_field(int, pid); \
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index b9a3adc..b6183bc 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -838,7 +838,7 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags,
}
struct ring_buffer_event *trace_buffer_lock_reserve(struct trace_array *tr,
- unsigned char type,
+ int type,
unsigned long len,
unsigned long flags, int pc)
{
@@ -881,7 +881,7 @@ void trace_buffer_unlock_commit(struct trace_array *tr,
}
struct ring_buffer_event *
-trace_current_buffer_lock_reserve(unsigned char type, unsigned long len,
+trace_current_buffer_lock_reserve(int type, unsigned long len,
unsigned long flags, int pc)
{
return trace_buffer_lock_reserve(&global_trace,
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 247948e..7d55bcf 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -422,7 +422,7 @@ void init_tracer_sysprof_debugfs(struct dentry *d_tracer);
struct ring_buffer_event;
struct ring_buffer_event *trace_buffer_lock_reserve(struct trace_array *tr,
- unsigned char type,
+ int type,
unsigned long len,
unsigned long flags,
int pc);
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 9ea55a7..5d6e879 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -398,7 +398,7 @@ static int trace_write_header(struct trace_seq *s)
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
"\n",
- FIELD(unsigned char, type),
+ FIELD(int, type),
FIELD(unsigned char, flags),
FIELD(unsigned char, preempt_count),
FIELD(int, pid),
next prev parent reply other threads:[~2009-04-22 10:07 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-22 8:53 [PATCH] tracing/events: make struct trace_entry->type to be int type Li Zefan
2009-04-22 9:10 ` Frederic Weisbecker
2009-04-22 9:19 ` Li Zefan
2009-04-22 9:40 ` Ingo Molnar
2009-04-22 10:06 ` tip-bot for Li Zefan [this message]
2009-04-22 13:40 ` [tip:tracing/core] " Steven Rostedt
2009-04-22 13:52 ` Ingo Molnar
2009-04-22 14:07 ` Steven Rostedt
2009-04-23 0:57 ` Li Zefan
2009-04-22 13:15 ` [PATCH] " 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=tip-7a4f453b6d7379a7c380825949977c5a838aa012@git.kernel.org \
--to=lizf@cn.fujitsu.com \
--cc=fweisbec@gmail.com \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-tip-commits@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=mingo@redhat.com \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
--cc=tzanussi@gmail.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.