On 2021-08-17 10:37:48 [+0200], Vlastimil Babka wrote:
> OK reproduced. Thanks, will investigate.
With the local_lock at the top, the needed alignment gets broken for dbl
cmpxchg. On RT it was working ;)
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index b5bcac29b979c..cd14aa1f9bc3c 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -42,9 +42,9 @@ enum stat_item {
NR_SLUB_STAT_ITEMS };
struct kmem_cache_cpu {
- local_lock_t lock; /* Protects the fields below except stat */
void **freelist; /* Pointer to next available object */
unsigned long tid; /* Globally unique transaction id */
+ local_lock_t lock; /* Protects the fields below except stat */
struct page *page; /* The slab from which we are allocating */
#ifdef CONFIG_SLUB_CPU_PARTIAL
struct page *partial; /* Partially allocated frozen slabs */
Sebastian
