mm: Enable SLUB for RT

Make SLUB RT aware by converting locks to raw and using free lists to move the freeing out of the lock held region. Signed-off-by: Thomas Gleixner <[email protected]>
0day-ci · Jul 27, 2018 · dec29e5 · dec29e5
1 parent 4202529
commit dec29e5
Show file tree

Hide file tree

Showing 2 changed files with 111 additions and 30 deletions.
diff --git a/mm/slab.h b/mm/slab.h
@@ -452,7 +452,11 @@ static inline void slab_post_alloc_hook(struct kmem_cache *s, gfp_t flags,
  * The slab lists for all objects.
  */
 struct kmem_cache_node {
+#ifdef CONFIG_SLUB
+	raw_spinlock_t list_lock;
+#else
 	spinlock_t list_lock;
+#endif
 
 #ifdef CONFIG_SLAB
 	struct list_head slabs_partial;	/* partial list first, better asm code */