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authorSteven Rostedt <rostedt@goodmis.org>2008-05-12 21:21:01 +0200
committerThomas Gleixner <tglx@linutronix.de>2008-05-23 21:56:02 +0200
commit53d0aa773053ab18287781e25d52c5faf9e0e09e (patch)
treec0e268cb22a0416efca8709c677d41b513af04d3 /kernel/trace/trace.h
parent72b59d67f80983f7bb587b086fb4cb1bc95263a4 (diff)
ftrace: add logic to record overruns
This patch sets up the infrastructure to record overruns of the tracing buffer. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/trace/trace.h')
-rw-r--r--kernel/trace/trace.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 8991c5efcc74..c1ec134ac356 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -97,6 +97,7 @@ struct trace_array_cpu {
void *trace_head; /* producer */
void *trace_tail; /* consumer */
unsigned long trace_idx;
+ unsigned long overrun;
unsigned long saved_latency;
unsigned long critical_start;
unsigned long critical_end;
@@ -157,10 +158,13 @@ struct trace_seq {
* results to users and which routines might sleep, etc:
*/
struct trace_iterator {
- struct trace_seq seq;
struct trace_array *tr;
struct tracer *trace;
+ long last_overrun[NR_CPUS];
+ long overrun[NR_CPUS];
+ /* The below is zeroed out in pipe_read */
+ struct trace_seq seq;
struct trace_entry *ent;
int cpu;