1 files changed, 6 insertions, 1 deletions

diff --git a/lib/dump_stack.c b/lib/dump_stack.c
index 5cff72f18c4a..33ffbf308853 100644
--- a/lib/dump_stack.c
+++ b/lib/dump_stack.c
@@ -106,7 +106,12 @@ retry:
                 was_locked = 1;
         } else {
                 local_irq_restore(flags);
-                cpu_relax();
+                /*
+                 * Wait for the lock to release before jumping to
+                 * atomic_cmpxchg() in order to mitigate the thundering herd
+                 * problem.
+                 */
+                do { cpu_relax(); } while (atomic_read(&dump_lock) != -1);
                 goto retry;
         }