Re: [PATCH v8 05/14] mm: multi-gen LRU: groundwork

diff --git a/mm/Kconfig b/mm/Kconfig
index 3326ee3903f3..4ef67f157374 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig

@@ -892,6 +892,28 @@ config ANON_VMA_NAME
          area from being merged with adjacent virtual memory areas due to the
          difference in their name.

+# the multi-gen LRU {
+config LRU_GEN
+       bool "Multi-Gen LRU"
+       depends on MMU
+       # the following options can use up the spare bits in page flags
+       depends on !MAXSMP && (64BIT || !SPARSEMEM || SPARSEMEM_VMEMMAP)
+       help
+         A high performance LRU implementation for memory overcommit.
+
+config NR_LRU_GENS
+       int "Max number of generations"
+       depends on LRU_GEN
+       range 4 31
+       default 4
+       help
+         Do not increase this value unless you plan to use working set
+         estimation and proactive reclaim. These features are usually for job
+         scheduling optimizations in data centers.
+
+         This option uses order_base_2(N+1) bits in page flags.
+# }