When perf didn't find a machine, it records its pid in the seen list.
With multi-thread enabled, it shoud be protected using a mutex.
Signed-off-by: Namhyung Kim <namhy...@kernel.org>
---
tools/perf/builtin-top.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index a9b7461be4f0..5987986b5203 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -916,7 +916,9 @@ static void perf_event__process_sample(struct reader_arg
*rarg,
if (!machine && perf_guest) {
static struct intlist *seen;
+ static pthread_mutex_t seen_lock = PTHREAD_MUTEX_INITIALIZER;
+ pthread_mutex_lock(&seen_lock);
if (!seen)
seen = intlist__new(NULL);
@@ -925,6 +927,7 @@ static void perf_event__process_sample(struct reader_arg
*rarg,
sample->pid);
intlist__add(seen, sample->pid);
}
+ pthread_mutex_unlock(&seen_lock);
return;
}
--
2.6.2
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