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SubjectRe: [REPOST PATCH] ftrace: Calculate the correct dyn_ftrace number to report to the userspace
On 10/15/15 at 10:25pm, Steven Rostedt wrote:
> On Thu, 17 Sep 2015 00:19:42 +0800
> Minfei Huang <mnfhuang@gmail.com> wrote:
>
> > 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.
> >
>
> Bah, your emails got lost in my Inbox. Sorry about that.
>
> I'll make an effort to look at this first thing tomorrow.

Ping. Any comment is appreciate.

Thanks
Minfei

>
> [ Cc'ing myself to remind me ]
>
> -- Steve
>
> > 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();
>


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