* [RFC][PATCH v4 1/2] tracing/syscalls: Rename a field 'nr' to '__syscall_nr' in format
@ 2016-02-27 16:41 Taeung Song
2016-03-08 19:24 ` Steven Rostedt
0 siblings, 1 reply; 6+ messages in thread
From: Taeung Song @ 2016-02-27 16:41 UTC (permalink / raw)
To: Steven Rostedt, Ingo Molnar
Cc: linux-kernel, Jiri Olsa, Namhyung Kim, Taeung Song,
Thomas Gleixner, Peter Zijlstra, Ingo Molnar,
Arnaldo Carvalho de Melo, Lai Jiangshan
Some syscalls tracepoint duplicated fields with the same name 'nr' i.e.
# cat /sys/kernel/debug/tracing/events/syscalls/sys_enter_io_getevents/format
name: sys_enter_io_getevents
ID: 739
format:
field:unsigned short common_type; offset:0; size:2; signed:0;
field:unsigned char common_flags; offset:2; size:1; signed:0;
field:unsigned char common_preempt_count; offset:3; size:1; signed:0;
field:int common_pid;offset:4;size:4;signed:1;
field:int nr; offset:8; size:4; signed:1;
field:aio_context_t ctx_id; offset:16; size:8; signed:0;
field:long min_nr; offset:24; size:8; signed:0;
field:long nr; offset:32; size:8; signed:0;
field:struct io_event * events; offset:40; size:8; signed:0;
field:struct timespec * timeout; offset:48; size:8; signed:0;
print fmt: "ctx_id: 0x%08lx, min_nr: 0x%08lx, nr: 0x%08lx,
events: 0x%08lx, timeout: 0x%08lx", ((unsigned long)(REC->ctx_id)),
((unsigned long)(REC->min_nr)), ((unsigned long)(REC->nr)),
((unsigned long)(REC->events)), ((unsigned long)(REC->timeout))
As above 'int nr;' and 'long nr;' fields have
duplicated name so problems are occurred in perf-script i.e.
# perf record -e syscalls:*
# perf script -g python
# perf script -s perf-script.py
File "perf-script.py", line 8694
def syscalls__sys_enter_io_getevents(event_name, context, common_cpu,
SyntaxError: duplicate argument 'nr' in function definition
Error running python script perf-script.py
As above, problems about duplicated argument occurred.
Not only sys_enter_io_getevent() but also sys_enter_io_submit()
have relevevance to this problem.
So rename a field 'nr' to '__syscall_nr' for system call number
without renaming a member 'nr' of two structures 'syscall_trace_enter'
and 'syscall_trace_exit'.
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
kernel/trace/trace_syscalls.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 0655afb..d166308 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -186,11 +186,11 @@ print_syscall_exit(struct trace_iterator *iter, int flags,
extern char *__bad_type_size(void);
-#define SYSCALL_FIELD(type, name) \
- sizeof(type) != sizeof(trace.name) ? \
+#define SYSCALL_FIELD(type, field, name) \
+ sizeof(type) != sizeof(trace.field) ? \
__bad_type_size() : \
- #type, #name, offsetof(typeof(trace), name), \
- sizeof(trace.name), is_signed_type(type)
+ #type, #name, offsetof(typeof(trace), field), \
+ sizeof(trace.field), is_signed_type(type)
static int __init
__set_enter_print_fmt(struct syscall_metadata *entry, char *buf, int len)
@@ -261,7 +261,8 @@ static int __init syscall_enter_define_fields(struct trace_event_call *call)
int i;
int offset = offsetof(typeof(trace), args);
- ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
+ ret = trace_define_field(call, SYSCALL_FIELD(int, nr, __syscall_nr),
+ FILTER_OTHER);
if (ret)
return ret;
@@ -281,11 +282,12 @@ static int __init syscall_exit_define_fields(struct trace_event_call *call)
struct syscall_trace_exit trace;
int ret;
- ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
+ ret = trace_define_field(call, SYSCALL_FIELD(int, nr, __syscall_nr),
+ FILTER_OTHER);
if (ret)
return ret;
- ret = trace_define_field(call, SYSCALL_FIELD(long, ret),
+ ret = trace_define_field(call, SYSCALL_FIELD(long, ret, ret),
FILTER_OTHER);
return ret;
--
2.5.0
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [RFC][PATCH v4 1/2] tracing/syscalls: Rename a field 'nr' to '__syscall_nr' in format
2016-02-27 16:41 [RFC][PATCH v4 1/2] tracing/syscalls: Rename a field 'nr' to '__syscall_nr' in format Taeung Song
@ 2016-03-08 19:24 ` Steven Rostedt
2016-03-08 19:32 ` Arnaldo Carvalho de Melo
0 siblings, 1 reply; 6+ messages in thread
From: Steven Rostedt @ 2016-03-08 19:24 UTC (permalink / raw)
To: Taeung Song
Cc: Ingo Molnar, linux-kernel, Jiri Olsa, Namhyung Kim,
Thomas Gleixner, Peter Zijlstra, Ingo Molnar,
Arnaldo Carvalho de Melo, Lai Jiangshan
On Sun, 28 Feb 2016 01:41:51 +0900
Taeung Song <treeze.taeung@gmail.com> wrote:
Have we decided what we are going to do with this patch? Pull it as is
and see what the fall out is?
Was there a perf patch with this too?
-- Steve
> Some syscalls tracepoint duplicated fields with the same name 'nr' i.e.
>
> # cat /sys/kernel/debug/tracing/events/syscalls/sys_enter_io_getevents/format
> name: sys_enter_io_getevents
> ID: 739
> format:
> field:unsigned short common_type; offset:0; size:2; signed:0;
> field:unsigned char common_flags; offset:2; size:1; signed:0;
> field:unsigned char common_preempt_count; offset:3; size:1; signed:0;
> field:int common_pid;offset:4;size:4;signed:1;
> field:int nr; offset:8; size:4; signed:1;
> field:aio_context_t ctx_id; offset:16; size:8; signed:0;
> field:long min_nr; offset:24; size:8; signed:0;
> field:long nr; offset:32; size:8; signed:0;
> field:struct io_event * events; offset:40; size:8; signed:0;
> field:struct timespec * timeout; offset:48; size:8; signed:0;
>
> print fmt: "ctx_id: 0x%08lx, min_nr: 0x%08lx, nr: 0x%08lx,
> events: 0x%08lx, timeout: 0x%08lx", ((unsigned long)(REC->ctx_id)),
> ((unsigned long)(REC->min_nr)), ((unsigned long)(REC->nr)),
> ((unsigned long)(REC->events)), ((unsigned long)(REC->timeout))
>
> As above 'int nr;' and 'long nr;' fields have
> duplicated name so problems are occurred in perf-script i.e.
>
> # perf record -e syscalls:*
> # perf script -g python
> # perf script -s perf-script.py
> File "perf-script.py", line 8694
> def syscalls__sys_enter_io_getevents(event_name, context, common_cpu,
> SyntaxError: duplicate argument 'nr' in function definition
> Error running python script perf-script.py
>
> As above, problems about duplicated argument occurred.
> Not only sys_enter_io_getevent() but also sys_enter_io_submit()
> have relevevance to this problem.
>
> So rename a field 'nr' to '__syscall_nr' for system call number
> without renaming a member 'nr' of two structures 'syscall_trace_enter'
> and 'syscall_trace_exit'.
>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
> Cc: Lai Jiangshan <jiangshanlai@gmail.com>
> Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
> ---
> kernel/trace/trace_syscalls.c | 16 +++++++++-------
> 1 file changed, 9 insertions(+), 7 deletions(-)
>
> diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
> index 0655afb..d166308 100644
> --- a/kernel/trace/trace_syscalls.c
> +++ b/kernel/trace/trace_syscalls.c
> @@ -186,11 +186,11 @@ print_syscall_exit(struct trace_iterator *iter, int flags,
>
> extern char *__bad_type_size(void);
>
> -#define SYSCALL_FIELD(type, name) \
> - sizeof(type) != sizeof(trace.name) ? \
> +#define SYSCALL_FIELD(type, field, name) \
> + sizeof(type) != sizeof(trace.field) ? \
> __bad_type_size() : \
> - #type, #name, offsetof(typeof(trace), name), \
> - sizeof(trace.name), is_signed_type(type)
> + #type, #name, offsetof(typeof(trace), field), \
> + sizeof(trace.field), is_signed_type(type)
>
> static int __init
> __set_enter_print_fmt(struct syscall_metadata *entry, char *buf, int len)
> @@ -261,7 +261,8 @@ static int __init syscall_enter_define_fields(struct trace_event_call *call)
> int i;
> int offset = offsetof(typeof(trace), args);
>
> - ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
> + ret = trace_define_field(call, SYSCALL_FIELD(int, nr, __syscall_nr),
> + FILTER_OTHER);
> if (ret)
> return ret;
>
> @@ -281,11 +282,12 @@ static int __init syscall_exit_define_fields(struct trace_event_call *call)
> struct syscall_trace_exit trace;
> int ret;
>
> - ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
> + ret = trace_define_field(call, SYSCALL_FIELD(int, nr, __syscall_nr),
> + FILTER_OTHER);
> if (ret)
> return ret;
>
> - ret = trace_define_field(call, SYSCALL_FIELD(long, ret),
> + ret = trace_define_field(call, SYSCALL_FIELD(long, ret, ret),
> FILTER_OTHER);
>
> return ret;
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [RFC][PATCH v4 1/2] tracing/syscalls: Rename a field 'nr' to '__syscall_nr' in format
2016-03-08 19:24 ` Steven Rostedt
@ 2016-03-08 19:32 ` Arnaldo Carvalho de Melo
2016-03-08 19:32 ` Arnaldo Carvalho de Melo
0 siblings, 1 reply; 6+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-03-08 19:32 UTC (permalink / raw)
To: Steven Rostedt
Cc: Taeung Song, Ingo Molnar, linux-kernel, Jiri Olsa, Namhyung Kim,
Thomas Gleixner, Peter Zijlstra, Ingo Molnar, Lai Jiangshan
Em Tue, Mar 08, 2016 at 02:24:34PM -0500, Steven Rostedt escreveu:
> On Sun, 28 Feb 2016 01:41:51 +0900
> Taeung Song <treeze.taeung@gmail.com> wrote:
>
>
> Have we decided what we are going to do with this patch? Pull it as is
> and see what the fall out is?
That was my understanding, you said somewhere that I could add your
signed-off-by, lemme dig that message...
> Was there a perf patch with this too?
Yes:
commit c42de706dad3f39c1f65e473a1d165ea33f8b6e8
Author: Taeung Song <treeze.taeung@gmail.com>
Date: Fri Feb 26 22:14:25 2016 +0900
perf trace: Check and discard not only 'nr' but also '__syscall_nr'
> -- Steve
>
> > Some syscalls tracepoint duplicated fields with the same name 'nr' i.e.
> >
> > # cat /sys/kernel/debug/tracing/events/syscalls/sys_enter_io_getevents/format
> > name: sys_enter_io_getevents
> > ID: 739
> > format:
> > field:unsigned short common_type; offset:0; size:2; signed:0;
> > field:unsigned char common_flags; offset:2; size:1; signed:0;
> > field:unsigned char common_preempt_count; offset:3; size:1; signed:0;
> > field:int common_pid;offset:4;size:4;signed:1;
> > field:int nr; offset:8; size:4; signed:1;
> > field:aio_context_t ctx_id; offset:16; size:8; signed:0;
> > field:long min_nr; offset:24; size:8; signed:0;
> > field:long nr; offset:32; size:8; signed:0;
> > field:struct io_event * events; offset:40; size:8; signed:0;
> > field:struct timespec * timeout; offset:48; size:8; signed:0;
> >
> > print fmt: "ctx_id: 0x%08lx, min_nr: 0x%08lx, nr: 0x%08lx,
> > events: 0x%08lx, timeout: 0x%08lx", ((unsigned long)(REC->ctx_id)),
> > ((unsigned long)(REC->min_nr)), ((unsigned long)(REC->nr)),
> > ((unsigned long)(REC->events)), ((unsigned long)(REC->timeout))
> >
> > As above 'int nr;' and 'long nr;' fields have
> > duplicated name so problems are occurred in perf-script i.e.
> >
> > # perf record -e syscalls:*
> > # perf script -g python
> > # perf script -s perf-script.py
> > File "perf-script.py", line 8694
> > def syscalls__sys_enter_io_getevents(event_name, context, common_cpu,
> > SyntaxError: duplicate argument 'nr' in function definition
> > Error running python script perf-script.py
> >
> > As above, problems about duplicated argument occurred.
> > Not only sys_enter_io_getevent() but also sys_enter_io_submit()
> > have relevevance to this problem.
> >
> > So rename a field 'nr' to '__syscall_nr' for system call number
> > without renaming a member 'nr' of two structures 'syscall_trace_enter'
> > and 'syscall_trace_exit'.
> >
> > Cc: Thomas Gleixner <tglx@linutronix.de>
> > Cc: Peter Zijlstra <peterz@infradead.org>
> > Cc: Ingo Molnar <mingo@redhat.com>
> > Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
> > Cc: Lai Jiangshan <jiangshanlai@gmail.com>
> > Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
> > Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
> > ---
> > kernel/trace/trace_syscalls.c | 16 +++++++++-------
> > 1 file changed, 9 insertions(+), 7 deletions(-)
> >
> > diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
> > index 0655afb..d166308 100644
> > --- a/kernel/trace/trace_syscalls.c
> > +++ b/kernel/trace/trace_syscalls.c
> > @@ -186,11 +186,11 @@ print_syscall_exit(struct trace_iterator *iter, int flags,
> >
> > extern char *__bad_type_size(void);
> >
> > -#define SYSCALL_FIELD(type, name) \
> > - sizeof(type) != sizeof(trace.name) ? \
> > +#define SYSCALL_FIELD(type, field, name) \
> > + sizeof(type) != sizeof(trace.field) ? \
> > __bad_type_size() : \
> > - #type, #name, offsetof(typeof(trace), name), \
> > - sizeof(trace.name), is_signed_type(type)
> > + #type, #name, offsetof(typeof(trace), field), \
> > + sizeof(trace.field), is_signed_type(type)
> >
> > static int __init
> > __set_enter_print_fmt(struct syscall_metadata *entry, char *buf, int len)
> > @@ -261,7 +261,8 @@ static int __init syscall_enter_define_fields(struct trace_event_call *call)
> > int i;
> > int offset = offsetof(typeof(trace), args);
> >
> > - ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
> > + ret = trace_define_field(call, SYSCALL_FIELD(int, nr, __syscall_nr),
> > + FILTER_OTHER);
> > if (ret)
> > return ret;
> >
> > @@ -281,11 +282,12 @@ static int __init syscall_exit_define_fields(struct trace_event_call *call)
> > struct syscall_trace_exit trace;
> > int ret;
> >
> > - ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
> > + ret = trace_define_field(call, SYSCALL_FIELD(int, nr, __syscall_nr),
> > + FILTER_OTHER);
> > if (ret)
> > return ret;
> >
> > - ret = trace_define_field(call, SYSCALL_FIELD(long, ret),
> > + ret = trace_define_field(call, SYSCALL_FIELD(long, ret, ret),
> > FILTER_OTHER);
> >
> > return ret;
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [RFC][PATCH v4 1/2] tracing/syscalls: Rename a field 'nr' to '__syscall_nr' in format
2016-03-08 19:32 ` Arnaldo Carvalho de Melo
@ 2016-03-08 19:32 ` Arnaldo Carvalho de Melo
2016-03-08 20:02 ` Steven Rostedt
2016-03-09 0:56 ` Taeung Song
0 siblings, 2 replies; 6+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-03-08 19:32 UTC (permalink / raw)
To: Steven Rostedt
Cc: Taeung Song, Ingo Molnar, linux-kernel, Jiri Olsa, Namhyung Kim,
Thomas Gleixner, Peter Zijlstra, Ingo Molnar, Lai Jiangshan
Em Tue, Mar 08, 2016 at 04:32:12PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Tue, Mar 08, 2016 at 02:24:34PM -0500, Steven Rostedt escreveu:
> > On Sun, 28 Feb 2016 01:41:51 +0900
> > Taeung Song <treeze.taeung@gmail.com> wrote:
> >
> >
> > Have we decided what we are going to do with this patch? Pull it as is
> > and see what the fall out is?
>
> That was my understanding, you said somewhere that I could add your
> signed-off-by, lemme dig that message...
And this is even already in tip/perf/core
> > Was there a perf patch with this too?
>
> Yes:
>
> commit c42de706dad3f39c1f65e473a1d165ea33f8b6e8
> Author: Taeung Song <treeze.taeung@gmail.com>
> Date: Fri Feb 26 22:14:25 2016 +0900
>
> perf trace: Check and discard not only 'nr' but also '__syscall_nr'
>
> > -- Steve
> >
> > > Some syscalls tracepoint duplicated fields with the same name 'nr' i.e.
> > >
> > > # cat /sys/kernel/debug/tracing/events/syscalls/sys_enter_io_getevents/format
> > > name: sys_enter_io_getevents
> > > ID: 739
> > > format:
> > > field:unsigned short common_type; offset:0; size:2; signed:0;
> > > field:unsigned char common_flags; offset:2; size:1; signed:0;
> > > field:unsigned char common_preempt_count; offset:3; size:1; signed:0;
> > > field:int common_pid;offset:4;size:4;signed:1;
> > > field:int nr; offset:8; size:4; signed:1;
> > > field:aio_context_t ctx_id; offset:16; size:8; signed:0;
> > > field:long min_nr; offset:24; size:8; signed:0;
> > > field:long nr; offset:32; size:8; signed:0;
> > > field:struct io_event * events; offset:40; size:8; signed:0;
> > > field:struct timespec * timeout; offset:48; size:8; signed:0;
> > >
> > > print fmt: "ctx_id: 0x%08lx, min_nr: 0x%08lx, nr: 0x%08lx,
> > > events: 0x%08lx, timeout: 0x%08lx", ((unsigned long)(REC->ctx_id)),
> > > ((unsigned long)(REC->min_nr)), ((unsigned long)(REC->nr)),
> > > ((unsigned long)(REC->events)), ((unsigned long)(REC->timeout))
> > >
> > > As above 'int nr;' and 'long nr;' fields have
> > > duplicated name so problems are occurred in perf-script i.e.
> > >
> > > # perf record -e syscalls:*
> > > # perf script -g python
> > > # perf script -s perf-script.py
> > > File "perf-script.py", line 8694
> > > def syscalls__sys_enter_io_getevents(event_name, context, common_cpu,
> > > SyntaxError: duplicate argument 'nr' in function definition
> > > Error running python script perf-script.py
> > >
> > > As above, problems about duplicated argument occurred.
> > > Not only sys_enter_io_getevent() but also sys_enter_io_submit()
> > > have relevevance to this problem.
> > >
> > > So rename a field 'nr' to '__syscall_nr' for system call number
> > > without renaming a member 'nr' of two structures 'syscall_trace_enter'
> > > and 'syscall_trace_exit'.
> > >
> > > Cc: Thomas Gleixner <tglx@linutronix.de>
> > > Cc: Peter Zijlstra <peterz@infradead.org>
> > > Cc: Ingo Molnar <mingo@redhat.com>
> > > Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
> > > Cc: Lai Jiangshan <jiangshanlai@gmail.com>
> > > Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
> > > Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
> > > ---
> > > kernel/trace/trace_syscalls.c | 16 +++++++++-------
> > > 1 file changed, 9 insertions(+), 7 deletions(-)
> > >
> > > diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
> > > index 0655afb..d166308 100644
> > > --- a/kernel/trace/trace_syscalls.c
> > > +++ b/kernel/trace/trace_syscalls.c
> > > @@ -186,11 +186,11 @@ print_syscall_exit(struct trace_iterator *iter, int flags,
> > >
> > > extern char *__bad_type_size(void);
> > >
> > > -#define SYSCALL_FIELD(type, name) \
> > > - sizeof(type) != sizeof(trace.name) ? \
> > > +#define SYSCALL_FIELD(type, field, name) \
> > > + sizeof(type) != sizeof(trace.field) ? \
> > > __bad_type_size() : \
> > > - #type, #name, offsetof(typeof(trace), name), \
> > > - sizeof(trace.name), is_signed_type(type)
> > > + #type, #name, offsetof(typeof(trace), field), \
> > > + sizeof(trace.field), is_signed_type(type)
> > >
> > > static int __init
> > > __set_enter_print_fmt(struct syscall_metadata *entry, char *buf, int len)
> > > @@ -261,7 +261,8 @@ static int __init syscall_enter_define_fields(struct trace_event_call *call)
> > > int i;
> > > int offset = offsetof(typeof(trace), args);
> > >
> > > - ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
> > > + ret = trace_define_field(call, SYSCALL_FIELD(int, nr, __syscall_nr),
> > > + FILTER_OTHER);
> > > if (ret)
> > > return ret;
> > >
> > > @@ -281,11 +282,12 @@ static int __init syscall_exit_define_fields(struct trace_event_call *call)
> > > struct syscall_trace_exit trace;
> > > int ret;
> > >
> > > - ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
> > > + ret = trace_define_field(call, SYSCALL_FIELD(int, nr, __syscall_nr),
> > > + FILTER_OTHER);
> > > if (ret)
> > > return ret;
> > >
> > > - ret = trace_define_field(call, SYSCALL_FIELD(long, ret),
> > > + ret = trace_define_field(call, SYSCALL_FIELD(long, ret, ret),
> > > FILTER_OTHER);
> > >
> > > return ret;
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [RFC][PATCH v4 1/2] tracing/syscalls: Rename a field 'nr' to '__syscall_nr' in format
2016-03-08 19:32 ` Arnaldo Carvalho de Melo
@ 2016-03-08 20:02 ` Steven Rostedt
2016-03-09 0:56 ` Taeung Song
1 sibling, 0 replies; 6+ messages in thread
From: Steven Rostedt @ 2016-03-08 20:02 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Taeung Song, Ingo Molnar, linux-kernel, Jiri Olsa, Namhyung Kim,
Thomas Gleixner, Peter Zijlstra, Ingo Molnar, Lai Jiangshan
On Tue, 8 Mar 2016 16:32:42 -0300
Arnaldo Carvalho de Melo <acme@kernel.org> wrote:
> Em Tue, Mar 08, 2016 at 04:32:12PM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Tue, Mar 08, 2016 at 02:24:34PM -0500, Steven Rostedt escreveu:
> > > On Sun, 28 Feb 2016 01:41:51 +0900
> > > Taeung Song <treeze.taeung@gmail.com> wrote:
> > >
> > >
> > > Have we decided what we are going to do with this patch? Pull it as is
> > > and see what the fall out is?
> >
> > That was my understanding, you said somewhere that I could add your
> > signed-off-by, lemme dig that message...
>
> And this is even already in tip/perf/core
>
OK, cool. Then I can take this off my todo list.
Thanks!
-- Steve
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [RFC][PATCH v4 1/2] tracing/syscalls: Rename a field 'nr' to '__syscall_nr' in format
2016-03-08 19:32 ` Arnaldo Carvalho de Melo
2016-03-08 20:02 ` Steven Rostedt
@ 2016-03-09 0:56 ` Taeung Song
1 sibling, 0 replies; 6+ messages in thread
From: Taeung Song @ 2016-03-09 0:56 UTC (permalink / raw)
To: Steven Rostedt, Arnaldo Carvalho de Melo
Cc: Ingo Molnar, linux-kernel, Jiri Olsa, Namhyung Kim,
Thomas Gleixner, Peter Zijlstra, Ingo Molnar, Lai Jiangshan
Hi, Steven and Arnaldo
Oh.. Arnaldo already replied :-)
Thank you,
Taeung
On 03/09/2016 04:32 AM, Arnaldo Carvalho de Melo wrote:
> Em Tue, Mar 08, 2016 at 04:32:12PM -0300, Arnaldo Carvalho de Melo escreveu:
>> Em Tue, Mar 08, 2016 at 02:24:34PM -0500, Steven Rostedt escreveu:
>>> On Sun, 28 Feb 2016 01:41:51 +0900
>>> Taeung Song <treeze.taeung@gmail.com> wrote:
>>>
>>>
>>> Have we decided what we are going to do with this patch? Pull it as is
>>> and see what the fall out is?
>>
>> That was my understanding, you said somewhere that I could add your
>> signed-off-by, lemme dig that message...
>
> And this is even already in tip/perf/core
>
>>> Was there a perf patch with this too?
>>
>> Yes:
>>
>> commit c42de706dad3f39c1f65e473a1d165ea33f8b6e8
>> Author: Taeung Song <treeze.taeung@gmail.com>
>> Date: Fri Feb 26 22:14:25 2016 +0900
>>
>> perf trace: Check and discard not only 'nr' but also '__syscall_nr'
>>
>>> -- Steve
>>>
>>>> Some syscalls tracepoint duplicated fields with the same name 'nr' i.e.
>>>>
>>>> # cat /sys/kernel/debug/tracing/events/syscalls/sys_enter_io_getevents/format
>>>> name: sys_enter_io_getevents
>>>> ID: 739
>>>> format:
>>>> field:unsigned short common_type; offset:0; size:2; signed:0;
>>>> field:unsigned char common_flags; offset:2; size:1; signed:0;
>>>> field:unsigned char common_preempt_count; offset:3; size:1; signed:0;
>>>> field:int common_pid;offset:4;size:4;signed:1;
>>>> field:int nr; offset:8; size:4; signed:1;
>>>> field:aio_context_t ctx_id; offset:16; size:8; signed:0;
>>>> field:long min_nr; offset:24; size:8; signed:0;
>>>> field:long nr; offset:32; size:8; signed:0;
>>>> field:struct io_event * events; offset:40; size:8; signed:0;
>>>> field:struct timespec * timeout; offset:48; size:8; signed:0;
>>>>
>>>> print fmt: "ctx_id: 0x%08lx, min_nr: 0x%08lx, nr: 0x%08lx,
>>>> events: 0x%08lx, timeout: 0x%08lx", ((unsigned long)(REC->ctx_id)),
>>>> ((unsigned long)(REC->min_nr)), ((unsigned long)(REC->nr)),
>>>> ((unsigned long)(REC->events)), ((unsigned long)(REC->timeout))
>>>>
>>>> As above 'int nr;' and 'long nr;' fields have
>>>> duplicated name so problems are occurred in perf-script i.e.
>>>>
>>>> # perf record -e syscalls:*
>>>> # perf script -g python
>>>> # perf script -s perf-script.py
>>>> File "perf-script.py", line 8694
>>>> def syscalls__sys_enter_io_getevents(event_name, context, common_cpu,
>>>> SyntaxError: duplicate argument 'nr' in function definition
>>>> Error running python script perf-script.py
>>>>
>>>> As above, problems about duplicated argument occurred.
>>>> Not only sys_enter_io_getevent() but also sys_enter_io_submit()
>>>> have relevevance to this problem.
>>>>
>>>> So rename a field 'nr' to '__syscall_nr' for system call number
>>>> without renaming a member 'nr' of two structures 'syscall_trace_enter'
>>>> and 'syscall_trace_exit'.
>>>>
>>>> Cc: Thomas Gleixner <tglx@linutronix.de>
>>>> Cc: Peter Zijlstra <peterz@infradead.org>
>>>> Cc: Ingo Molnar <mingo@redhat.com>
>>>> Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
>>>> Cc: Lai Jiangshan <jiangshanlai@gmail.com>
>>>> Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
>>>> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
>>>> ---
>>>> kernel/trace/trace_syscalls.c | 16 +++++++++-------
>>>> 1 file changed, 9 insertions(+), 7 deletions(-)
>>>>
>>>> diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
>>>> index 0655afb..d166308 100644
>>>> --- a/kernel/trace/trace_syscalls.c
>>>> +++ b/kernel/trace/trace_syscalls.c
>>>> @@ -186,11 +186,11 @@ print_syscall_exit(struct trace_iterator *iter, int flags,
>>>>
>>>> extern char *__bad_type_size(void);
>>>>
>>>> -#define SYSCALL_FIELD(type, name) \
>>>> - sizeof(type) != sizeof(trace.name) ? \
>>>> +#define SYSCALL_FIELD(type, field, name) \
>>>> + sizeof(type) != sizeof(trace.field) ? \
>>>> __bad_type_size() : \
>>>> - #type, #name, offsetof(typeof(trace), name), \
>>>> - sizeof(trace.name), is_signed_type(type)
>>>> + #type, #name, offsetof(typeof(trace), field), \
>>>> + sizeof(trace.field), is_signed_type(type)
>>>>
>>>> static int __init
>>>> __set_enter_print_fmt(struct syscall_metadata *entry, char *buf, int len)
>>>> @@ -261,7 +261,8 @@ static int __init syscall_enter_define_fields(struct trace_event_call *call)
>>>> int i;
>>>> int offset = offsetof(typeof(trace), args);
>>>>
>>>> - ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
>>>> + ret = trace_define_field(call, SYSCALL_FIELD(int, nr, __syscall_nr),
>>>> + FILTER_OTHER);
>>>> if (ret)
>>>> return ret;
>>>>
>>>> @@ -281,11 +282,12 @@ static int __init syscall_exit_define_fields(struct trace_event_call *call)
>>>> struct syscall_trace_exit trace;
>>>> int ret;
>>>>
>>>> - ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
>>>> + ret = trace_define_field(call, SYSCALL_FIELD(int, nr, __syscall_nr),
>>>> + FILTER_OTHER);
>>>> if (ret)
>>>> return ret;
>>>>
>>>> - ret = trace_define_field(call, SYSCALL_FIELD(long, ret),
>>>> + ret = trace_define_field(call, SYSCALL_FIELD(long, ret, ret),
>>>> FILTER_OTHER);
>>>>
>>>> return ret;
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2016-03-09 0:57 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2016-02-27 16:41 [RFC][PATCH v4 1/2] tracing/syscalls: Rename a field 'nr' to '__syscall_nr' in format Taeung Song
2016-03-08 19:24 ` Steven Rostedt
2016-03-08 19:32 ` Arnaldo Carvalho de Melo
2016-03-08 19:32 ` Arnaldo Carvalho de Melo
2016-03-08 20:02 ` Steven Rostedt
2016-03-09 0:56 ` Taeung Song
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox