* [PATCH] trace/kprobe: remove duplicated call of ring_buffer_event_data
@ 2022-10-18 7:13 Song Chen
2022-10-18 13:59 ` Steven Rostedt
0 siblings, 1 reply; 4+ messages in thread
From: Song Chen @ 2022-10-18 7:13 UTC (permalink / raw)
To: rostedt, mingo; +Cc: linux-kernel, xiehuan09, Song Chen
Function __kprobe_trace_func calls ring_buffer_event_data to get
a ring buffer, however, it has been done in above call
trace_event_buffer_reserve.
So remove one of them.
Signed-off-by: Song Chen <chensong_2000@189.cn>
---
kernel/trace/trace_kprobe.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 23f7f0ec4f4c..dfd5809a4a65 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1394,7 +1394,6 @@ __kprobe_trace_func(struct trace_kprobe *tk, struct pt_regs *regs,
return;
fbuffer.regs = regs;
- entry = fbuffer.entry = ring_buffer_event_data(fbuffer.event);
entry->ip = (unsigned long)tk->rp.kp.addr;
store_trace_args(&entry[1], &tk->tp, regs, sizeof(*entry), dsize);
--
2.25.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] trace/kprobe: remove duplicated call of ring_buffer_event_data
2022-10-18 7:13 [PATCH] trace/kprobe: remove duplicated call of ring_buffer_event_data Song Chen
@ 2022-10-18 13:59 ` Steven Rostedt
2022-10-18 15:22 ` Masami Hiramatsu
0 siblings, 1 reply; 4+ messages in thread
From: Steven Rostedt @ 2022-10-18 13:59 UTC (permalink / raw)
To: Song Chen; +Cc: mingo, linux-kernel, xiehuan09, Masami Hiramatsu
[ Added Masami who's the new co-maintainer, and this is his code ]
On Tue, 18 Oct 2022 15:13:06 +0800
Song Chen <chensong_2000@189.cn> wrote:
> Function __kprobe_trace_func calls ring_buffer_event_data to get
> a ring buffer, however, it has been done in above call
> trace_event_buffer_reserve.
>
> So remove one of them.
>
May as well add:
Fixes: 5e6cd84e2f8bd ("tracing/kprobes: Do not open code event reserve logic")
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
-- Steve
> Signed-off-by: Song Chen <chensong_2000@189.cn>
> ---
> kernel/trace/trace_kprobe.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
> index 23f7f0ec4f4c..dfd5809a4a65 100644
> --- a/kernel/trace/trace_kprobe.c
> +++ b/kernel/trace/trace_kprobe.c
> @@ -1394,7 +1394,6 @@ __kprobe_trace_func(struct trace_kprobe *tk, struct pt_regs *regs,
> return;
>
> fbuffer.regs = regs;
> - entry = fbuffer.entry = ring_buffer_event_data(fbuffer.event);
> entry->ip = (unsigned long)tk->rp.kp.addr;
> store_trace_args(&entry[1], &tk->tp, regs, sizeof(*entry), dsize);
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] trace/kprobe: remove duplicated call of ring_buffer_event_data
2022-10-18 13:59 ` Steven Rostedt
@ 2022-10-18 15:22 ` Masami Hiramatsu
2022-10-19 1:27 ` Song Chen
0 siblings, 1 reply; 4+ messages in thread
From: Masami Hiramatsu @ 2022-10-18 15:22 UTC (permalink / raw)
To: Steven Rostedt
Cc: Song Chen, mingo, linux-kernel, xiehuan09, Masami Hiramatsu
Hi,
On Tue, 18 Oct 2022 09:59:32 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:
>
> [ Added Masami who's the new co-maintainer, and this is his code ]
>
> On Tue, 18 Oct 2022 15:13:06 +0800
> Song Chen <chensong_2000@189.cn> wrote:
>
> > Function __kprobe_trace_func calls ring_buffer_event_data to get
> > a ring buffer, however, it has been done in above call
> > trace_event_buffer_reserve.
> >
> > So remove one of them.
> >
>
> May as well add:
>
> Fixes: 5e6cd84e2f8bd ("tracing/kprobes: Do not open code event reserve logic")
>
> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Oops, and we have another line in __kretprobe_trace_func() too.
Song, can you update this patch to fix the __kretprobe_trace_func() too?
Thank you,
>
> -- Steve
>
>
> > Signed-off-by: Song Chen <chensong_2000@189.cn>
> > ---
> > kernel/trace/trace_kprobe.c | 1 -
> > 1 file changed, 1 deletion(-)
> >
> > diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
> > index 23f7f0ec4f4c..dfd5809a4a65 100644
> > --- a/kernel/trace/trace_kprobe.c
> > +++ b/kernel/trace/trace_kprobe.c
> > @@ -1394,7 +1394,6 @@ __kprobe_trace_func(struct trace_kprobe *tk, struct pt_regs *regs,
> > return;
> >
> > fbuffer.regs = regs;
> > - entry = fbuffer.entry = ring_buffer_event_data(fbuffer.event);
> > entry->ip = (unsigned long)tk->rp.kp.addr;
> > store_trace_args(&entry[1], &tk->tp, regs, sizeof(*entry), dsize);
> >
>
--
Masami Hiramatsu (Google) <mhiramat@kernel.org>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] trace/kprobe: remove duplicated call of ring_buffer_event_data
2022-10-18 15:22 ` Masami Hiramatsu
@ 2022-10-19 1:27 ` Song Chen
0 siblings, 0 replies; 4+ messages in thread
From: Song Chen @ 2022-10-19 1:27 UTC (permalink / raw)
To: Masami Hiramatsu (Google), Steven Rostedt; +Cc: mingo, linux-kernel, xiehuan09
Hi,
在 2022/10/18 23:22, Masami Hiramatsu (Google) 写道:
> Hi,
>
> On Tue, 18 Oct 2022 09:59:32 -0400
> Steven Rostedt <rostedt@goodmis.org> wrote:
>
>>
>> [ Added Masami who's the new co-maintainer, and this is his code ]
>>
>> On Tue, 18 Oct 2022 15:13:06 +0800
>> Song Chen <chensong_2000@189.cn> wrote:
>>
>>> Function __kprobe_trace_func calls ring_buffer_event_data to get
>>> a ring buffer, however, it has been done in above call
>>> trace_event_buffer_reserve.
>>>
>>> So remove one of them.
>>>
>>
>> May as well add:
>>
>> Fixes: 5e6cd84e2f8bd ("tracing/kprobes: Do not open code event reserve logic")
>>
>> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
>
> Oops, and we have another line in __kretprobe_trace_func() too.
>
> Song, can you update this patch to fix the __kretprobe_trace_func() too?
>
> Thank you,
>
will do
Song
>>
>> -- Steve
>>
>>
>>> Signed-off-by: Song Chen <chensong_2000@189.cn>
>>> ---
>>> kernel/trace/trace_kprobe.c | 1 -
>>> 1 file changed, 1 deletion(-)
>>>
>>> diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
>>> index 23f7f0ec4f4c..dfd5809a4a65 100644
>>> --- a/kernel/trace/trace_kprobe.c
>>> +++ b/kernel/trace/trace_kprobe.c
>>> @@ -1394,7 +1394,6 @@ __kprobe_trace_func(struct trace_kprobe *tk, struct pt_regs *regs,
>>> return;
>>>
>>> fbuffer.regs = regs;
>>> - entry = fbuffer.entry = ring_buffer_event_data(fbuffer.event);
>>> entry->ip = (unsigned long)tk->rp.kp.addr;
>>> store_trace_args(&entry[1], &tk->tp, regs, sizeof(*entry), dsize);
>>>
>>
>
>
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2022-10-19 1:27 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2022-10-18 7:13 [PATCH] trace/kprobe: remove duplicated call of ring_buffer_event_data Song Chen
2022-10-18 13:59 ` Steven Rostedt
2022-10-18 15:22 ` Masami Hiramatsu
2022-10-19 1:27 ` Song Chen
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