diff options
| author | Abhishek Sagar <sagar.abhishek@gmail.com> | 2008-06-21 18:17:53 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-06-23 20:10:58 (GMT) |
| commit | ecea656d1d5e912d2f3d332657ea4a6d8380f891 (patch) | |
| tree | fd139cdd762230bf4e55a1341ba29e2b309968b1 /kernel/trace/trace.c | |
| parent | 785656a41f9a9c0e843a23d1ae05d900b5158f8f (diff) | |
| download | linux-ecea656d1d5e912d2f3d332657ea4a6d8380f891.tar.xz | |
ftrace: freeze kprobe'd records
Let records identified as being kprobe'd be marked as "frozen". The trouble
with records which have a kprobe installed on their mcount call-site is
that they don't get updated. So if such a function which is currently being
traced gets its tracing disabled due to a new filter rule (or because it
was added to the notrace list) then it won't be updated and continue being
traced. This patch allows scanning of all frozen records during tracing to
check if they should be traced.
Signed-off-by: Abhishek Sagar <sagar.abhishek@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 6e9dae7..9ade793 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -988,6 +988,9 @@ function_trace_call(unsigned long ip, unsigned long parent_ip) if (unlikely(!tracer_enabled)) return; + if (skip_trace(ip)) + return; + local_irq_save(flags); cpu = raw_smp_processor_id(); data = tr->data[cpu]; |