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tracing: do not update tracing_max_latency when tracer is stopped

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The state of the function pair tracing_stop()/tracing_start() is
correctly considered when tracer data are updated. However, the global
and externally accessible variable tracing_max_latency is always updated
- even when tracing is stopped.

The update should only occur, if tracing was not stopped.

Signed-off-by: Carsten Emde <C.Emde@osadl.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Carsten Emde 2009-09-13 01:43:07 +02:00 • committed by Steven Rostedt
commit b5130b1e7d
4 changed files with 14 additions and 4 deletions
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6
kernel/trace/trace_irqsoff.c
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@ -157,8 +157,10 @@ check_critical_timing(struct trace_array *tr,
data->critical_end = parent_ip;
tracing_max_latency = delta;
update_max_tr_single(tr, current, cpu);
if (likely(!is_tracing_stopped())) {
tracing_max_latency = delta;
update_max_tr_single(tr, current, cpu);
}
max_sequence++;