Hook into hrtimer to TRACE() timer hangs

1 files changed, 8 insertions, 0 deletions

diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index feeaaff14b57..41bfdd417f00 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -1411,8 +1411,13 @@ retry:
          */
         cpu_base->nr_hangs++;
         cpu_base->hang_detected = 1;
+
+        TRACE("hrtimer hang detected on P%d: #%u \n",
+                cpu_base->cpu, cpu_base->nr_hangs);
+
         raw_spin_unlock(&cpu_base->lock);
         delta = ktime_sub(now, entry_time);
+        TRACE("hrtimer hang delta.tv64:%u\n", (unsigned int)delta.tv64);
         if ((unsigned int)delta.tv64 > cpu_base->max_hang_time)
                 cpu_base->max_hang_time = (unsigned int) delta.tv64;
         /*
@@ -1423,6 +1428,9 @@ retry:
                 expires_next = ktime_add_ns(now, 100 * NSEC_PER_MSEC);
         else
                 expires_next = ktime_add(now, delta);
+
+        TRACE("hrtimer expires_next:%llu\n", expires_next.tv64);
+
         tick_program_event(expires_next, 1);
         printk_once(KERN_WARNING "hrtimer: interrupt took %llu ns\n",
                     ktime_to_ns(delta));