* [PATCH] ftrace: Calculate the correct dyn_ftrace number to report to the userspace
@ 2015-07-22 3:13 Minfei Huang
2015-08-11 15:32 ` Minfei Huang
0 siblings, 1 reply; 3+ messages in thread
From: Minfei Huang @ 2015-07-22 3:13 UTC (permalink / raw)
To: rostedt, mingo, tglx, hpa; +Cc: x86, linux-kernel, Minfei Huang
From: Minfei Huang <mnfhuang@gmail.com>
Now, ftrace only calculate the dyn_ftrace number in the adding
breakpoint loop, not in adding update and finish update loop.
Calculate the correct dyn_ftrace, once ftrace reports the failure message
to the userspace.
Signed-off-by: Minfei Huang <mnfhuang@gmail.com>
---
arch/x86/kernel/ftrace.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 8b7b0a5..311bcf3 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -556,6 +556,7 @@ void ftrace_replace_code(int enable)
run_sync();
report = "updating code";
+ count = 0;
for_ftrace_rec_iter(iter) {
rec = ftrace_rec_iter_record(iter);
@@ -563,11 +564,13 @@ void ftrace_replace_code(int enable)
ret = add_update(rec, enable);
if (ret)
goto remove_breakpoints;
+ count++;
}
run_sync();
report = "removing breakpoints";
+ count = 0;
for_ftrace_rec_iter(iter) {
rec = ftrace_rec_iter_record(iter);
@@ -575,6 +578,7 @@ void ftrace_replace_code(int enable)
ret = finish_update(rec, enable);
if (ret)
goto remove_breakpoints;
+ count++;
}
run_sync();
--
2.4.0
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] ftrace: Calculate the correct dyn_ftrace number to report to the userspace
2015-07-22 3:13 [PATCH] ftrace: Calculate the correct dyn_ftrace number to report to the userspace Minfei Huang
@ 2015-08-11 15:32 ` Minfei Huang
2015-08-11 15:50 ` Steven Rostedt
0 siblings, 1 reply; 3+ messages in thread
From: Minfei Huang @ 2015-08-11 15:32 UTC (permalink / raw)
To: rostedt, mingo, tglx, hpa; +Cc: x86, linux-kernel, Minfei Huang
Ping.
Could someone help to review this patch?
Thanks
Minfei
On 07/22/15 at 11:13am, Minfei Huang wrote:
> From: Minfei Huang <mnfhuang@gmail.com>
>
> Now, ftrace only calculate the dyn_ftrace number in the adding
> breakpoint loop, not in adding update and finish update loop.
>
> Calculate the correct dyn_ftrace, once ftrace reports the failure message
> to the userspace.
>
> Signed-off-by: Minfei Huang <mnfhuang@gmail.com>
> ---
> arch/x86/kernel/ftrace.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
> index 8b7b0a5..311bcf3 100644
> --- a/arch/x86/kernel/ftrace.c
> +++ b/arch/x86/kernel/ftrace.c
> @@ -556,6 +556,7 @@ void ftrace_replace_code(int enable)
> run_sync();
>
> report = "updating code";
> + count = 0;
>
> for_ftrace_rec_iter(iter) {
> rec = ftrace_rec_iter_record(iter);
> @@ -563,11 +564,13 @@ void ftrace_replace_code(int enable)
> ret = add_update(rec, enable);
> if (ret)
> goto remove_breakpoints;
> + count++;
> }
>
> run_sync();
>
> report = "removing breakpoints";
> + count = 0;
>
> for_ftrace_rec_iter(iter) {
> rec = ftrace_rec_iter_record(iter);
> @@ -575,6 +578,7 @@ void ftrace_replace_code(int enable)
> ret = finish_update(rec, enable);
> if (ret)
> goto remove_breakpoints;
> + count++;
> }
>
> run_sync();
> --
> 2.4.0
>
> --
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] ftrace: Calculate the correct dyn_ftrace number to report to the userspace
2015-08-11 15:32 ` Minfei Huang
@ 2015-08-11 15:50 ` Steven Rostedt
0 siblings, 0 replies; 3+ messages in thread
From: Steven Rostedt @ 2015-08-11 15:50 UTC (permalink / raw)
To: Minfei Huang; +Cc: mingo, tglx, hpa, x86, linux-kernel, Minfei Huang
On Tue, 11 Aug 2015 23:32:38 +0800
Minfei Huang <mhuang@redhat.com> wrote:
> Ping.
>
> Could someone help to review this patch?
>
I'll take a look at it. I'm also getting ready to go to Seattle for
LinuxCon/Plumbers. This isn't urgent. If there's nothing wrong with it,
I'll try to get it into 4.3.
-- Steve
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2015-08-11 15:50 UTC | newest]
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2015-07-22 3:13 [PATCH] ftrace: Calculate the correct dyn_ftrace number to report to the userspace Minfei Huang
2015-08-11 15:32 ` Minfei Huang
2015-08-11 15:50 ` Steven Rostedt
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