On the function_graph tracer, the print_graph_irq() function prints a
trace line with the flag ==========> on an irq handler entry, and the
flag <========== on an irq handler return.
But when the latency-format is enable, it is not printing the
latency-format flags, causing the following error in the trace output:
0) ==========> |
0) d... | smp_apic_timer_interrupt() {
This patch fixes this issue by printing the latency-format flags when
it is enable.
Signed-off-by: Daniel Bristot de Oliveira <[email protected]>
Reviewed-by: Luis Claudio R. Goncalves <[email protected]>
---
kernel/trace/trace_functions_graph.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/kernel/trace/trace_functions_graph.c
b/kernel/trace/trace_functions_graph.c
index f0a0c98..740f1a0 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -699,6 +699,7 @@ print_graph_irq(struct trace_iterator *iter, unsigned long
addr,
{
int ret;
struct trace_seq *s = &iter->seq;
+ struct trace_entry *ent = iter->ent;
if (addr < (unsigned long)__irqentry_text_start ||
addr >= (unsigned long)__irqentry_text_end)
@@ -728,6 +729,14 @@ print_graph_irq(struct trace_iterator *iter, unsigned long
addr,
if (!ret)
return TRACE_TYPE_PARTIAL_LINE;
}
+
+ /* Latency format */
+ if (trace_flags & TRACE_ITER_LATENCY_FMT) {
+ ret = print_graph_lat_fmt(s, ent);
+ if (ret == TRACE_TYPE_PARTIAL_LINE)
+ return TRACE_TYPE_PARTIAL_LINE;
+ }
+
}
/* No overhead */
--
1.9.3
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