* [PATCH 2/2 v3] tracing/uprobes: Support soft-mode disabling
@ 2013-06-25 3:30 zhangwei(Jovi)
2013-06-25 10:19 ` Masami Hiramatsu
0 siblings, 1 reply; 2+ messages in thread
From: zhangwei(Jovi) @ 2013-06-25 3:30 UTC (permalink / raw)
To: Steven Rostedt, Masami Hiramatsu, Oleg Nesterov
Cc: Frederic Weisbecker, Ingo Molnar, Srikar Dronamraju,
linux-kernel@vger.kernel.org
Support soft-mode disabling on uprobe-based dynamic events.
Soft-disabling is just ignoring recording if the soft disabled
flag is set.
Signed-off-by: zhangwei(Jovi) <jovi.zhangwe@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
---
kernel/trace/trace_uprobe.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index dbbb4a9..d2da3ea 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -530,6 +530,9 @@ static void uprobe_trace_print(struct trace_uprobe *tu,
WARN_ON(call != ftrace_file->event_call);
+ if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, &ftrace_file->flags))
+ return;
+
size = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));
event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
call->event.type,
--
1.7.9.7
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH 2/2 v3] tracing/uprobes: Support soft-mode disabling
2013-06-25 3:30 [PATCH 2/2 v3] tracing/uprobes: Support soft-mode disabling zhangwei(Jovi)
@ 2013-06-25 10:19 ` Masami Hiramatsu
0 siblings, 0 replies; 2+ messages in thread
From: Masami Hiramatsu @ 2013-06-25 10:19 UTC (permalink / raw)
To: zhangwei(Jovi)
Cc: Steven Rostedt, Oleg Nesterov, Frederic Weisbecker, Ingo Molnar,
Srikar Dronamraju, linux-kernel@vger.kernel.org,
yrl.pp-manager.tt@hitachi.com
(2013/06/25 12:30), zhangwei(Jovi) wrote:
> Support soft-mode disabling on uprobe-based dynamic events.
> Soft-disabling is just ignoring recording if the soft disabled
> flag is set.
>
> Signed-off-by: zhangwei(Jovi) <jovi.zhangwe@huawei.com>
Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Thank you!
> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
> Cc: Frederic Weisbecker <fweisbec@gmail.com>
> Cc: Oleg Nesterov <oleg@redhat.com>
> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
> ---
> kernel/trace/trace_uprobe.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
> index dbbb4a9..d2da3ea 100644
> --- a/kernel/trace/trace_uprobe.c
> +++ b/kernel/trace/trace_uprobe.c
> @@ -530,6 +530,9 @@ static void uprobe_trace_print(struct trace_uprobe *tu,
>
> WARN_ON(call != ftrace_file->event_call);
>
> + if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, &ftrace_file->flags))
> + return;
> +
> size = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));
> event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
> call->event.type,
>
--
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@hitachi.com
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