+#ifdef __KERNEL__
+
+/* Allocations above this size are considered too big and could not be done
+ * atomically.
+ *
+ * Be very careful when changing this value, especially when decreasing it,
+ * since vmalloc in Linux doesn't perform well on multi-cores system, calling
+ * vmalloc in critical path would hurt peformance badly. See LU-66.
+ */
+#define OBD_ALLOC_BIG (4 * CFS_PAGE_SIZE)
+
+#define OBD_ALLOC_LARGE(ptr, size) \
+do { \
+ if (size > OBD_ALLOC_BIG) \
+ OBD_VMALLOC(ptr, size); \
+ else \
+ OBD_ALLOC(ptr, size); \
+} while (0)
+
+#define OBD_FREE_LARGE(ptr, size) \
+do { \
+ if (size > OBD_ALLOC_BIG) \
+ OBD_VFREE(ptr, size); \
+ else \
+ OBD_FREE(ptr, size); \
+} while (0)
+#else
+#define OBD_ALLOC_LARGE(ptr, size) OBD_ALLOC(ptr, size)
+#define OBD_FREE_LARGE(ptr, size) OBD_FREE(ptr,size)
+#endif
+