author: Zqiang <qiang.zhang@windriver.com> 2020-09-08 14:27:09 +0800
committer: Thomas Gleixner <tglx@linutronix.de> 2020-10-01 16:13:54 +0200
commit: 88451f2cd3cec2abc30debdf129422d2699d1eba
parent: f9e62f318fd706a54b7ce9b28e5c7e49bbde8788
Commit Summary:
Diffstat:
1 file changed, 23 insertions, 0 deletions
diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index e2a3171b6c63..9e14ae02306b 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -19,6 +19,7 @@
#include <linux/slab.h>
#include <linux/hash.h>
#include <linux/kmemleak.h>
+#include <linux/cpu.h>
#define ODEBUG_HASH_BITS 14
#define ODEBUG_HASH_SIZE (1 << ODEBUG_HASH_BITS)
@@ -433,6 +434,25 @@ static void free_object(struct debug_obj *obj)
}
}
+#ifdef CONFIG_HOTPLUG_CPU
+static int object_cpu_offline(unsigned int cpu)
+{
+ struct debug_percpu_free *percpu_pool;
+ struct hlist_node *tmp;
+ struct debug_obj *obj;
+
+ /* Remote access is safe as the CPU is dead already */
+ percpu_pool = per_cpu_ptr(&percpu_obj_pool, cpu);
+ hlist_for_each_entry_safe(obj, tmp, &percpu_pool->free_objs, node) {
+ hlist_del(&obj->node);
+ kmem_cache_free(obj_cache, obj);
+ }
+ percpu_pool->obj_free = 0;
+
+ return 0;
+}
+#endif
+
/*
* We run out of memory. That means we probably have tons of objects
* allocated.
@@ -1367,6 +1387,11 @@ void __init debug_objects_mem_init(void)
} else
debug_objects_selftest();
+#ifdef CONFIG_HOTPLUG_CPU
+ cpuhp_setup_state_nocalls(CPUHP_DEBUG_OBJ_DEAD, "object:offline", NULL,
+ object_cpu_offline);
+#endif
+
/*
* Increase the thresholds for allocating and freeing objects
* according to the number of possible CPUs available in the system.