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| author | Peter Zijlstra <peterz@infradead.org> | 2016-03-18 15:28:04 (GMT) |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2016-03-22 22:04:10 (GMT) |
| commit | 7e6867bf831c71fe0e47438831ae3a94d4c7ab3c (patch) | |
| tree | aff6902663d850f314a23900a8caebf9a78e2a86 /kernel/trace/trace.c | |
| parent | 3debb0a9ddb16526de8b456491b7db60114f7b5e (diff) | |
| download | linux-7e6867bf831c71fe0e47438831ae3a94d4c7ab3c.tar.xz | |
tracing: Record and show NMI state
The latency tracer format has a nice column to indicate IRQ state, but
this is not able to tell us about NMI state.
When tracing perf interrupt handlers (which often run in NMI context)
it is very useful to see how the events nest.
Link: http://lkml.kernel.org/r/20160318153022.105068893@infradead.org
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index cb2b708..7bdf8ba 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1664,6 +1664,7 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags, #else TRACE_FLAG_IRQS_NOSUPPORT | #endif + ((pc & NMI_MASK ) ? TRACE_FLAG_NMI : 0) | ((pc & HARDIRQ_MASK) ? TRACE_FLAG_HARDIRQ : 0) | ((pc & SOFTIRQ_MASK) ? TRACE_FLAG_SOFTIRQ : 0) | (tif_need_resched() ? TRACE_FLAG_NEED_RESCHED : 0) | |