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-rw-r--r--kernel/trace/ring_buffer.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index bd1c35a4fbcc..7739893a1d0a 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -2163,10 +2163,14 @@ rb_reserve_next_event(struct ring_buffer *buffer,
delta = diff;
if (unlikely(test_time_stamp(delta))) {
WARN_ONCE(delta > (1ULL << 59),
- KERN_WARNING "Delta way too big! %llu ts=%llu write stamp = %llu\n",
+ KERN_WARNING "Delta way too big! %llu ts=%llu write stamp = %llu\n%s",
(unsigned long long)delta,
(unsigned long long)ts,
- (unsigned long long)cpu_buffer->write_stamp);
+ (unsigned long long)cpu_buffer->write_stamp,
+ sched_clock_stable ? "" :
+ "If you just came from a suspend/resume,\n"
+ "please switch to the trace global clock:\n"
+ " echo global > /sys/kernel/debug/tracing/trace_clock\n");
add_timestamp = 1;
}
}