Messages in this thread Patch in this message | | | Date | Fri, 14 Nov 2014 18:24:09 -0500 | From | Steven Rostedt <> | Subject | [for-next][PATCH 8/9] ftrace-graph: show latency-format on print_graph_irq() |
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From: Daniel Bristot de Oliveira <bristot@redhat.com>
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.
Link: http://lkml.kernel.org/r/7c2e226dac20c940b6242178fab7f0e3c9b5ce58.1415233316.git.bristot@redhat.com
Reviewed-by: Luis Claudio R. Goncalves <lgoncalv@redhat.com> Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> --- 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 a82d1d3bd76d..93ebba09622e 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 */ -- 2.1.1
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