summaryrefslogtreecommitdiff
path: root/lib/dump_stack.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/dump_stack.c')
-rw-r--r--lib/dump_stack.c7
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;
}