[PATCH] mm/Kconfig: allow user to select MIGRATION if MEMORY_FAILURE is enabled

[Xie Yuanbin]

Currently, memory-failure can be enabled without migration. However,
migration cannot be selected by user when memory-failure is enabled.

Migration is very useful for soft_offline_page(), which may be triggered
by correctable memory errors. Most of the anonymous or file-mapping
faulty pages can be migrated to other healthy pages.

Allow user to select MIGRATION if MEMORY_FAILURE is enabled.
Also, select MIGRATION by default if MEMORY_FAILURE is enabled.

Signed-off-by: Xie Yuanbin <xieyuanbin1@xxxxxxxxxx>
---
 mm/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/Kconfig b/mm/Kconfig
index 8a24c130d008..b4c217383b51 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -682,7 +682,8 @@ config NUMA_MIGRATION
 	  demotion for memory tiering.
 
 config MIGRATION
-	bool
+	bool "Enable page migration" if MEMORY_FAILURE	
+	default y if MEMORY_FAILURE
 	depends on MMU
 
 config DEVICE_MIGRATION
-- 
2.55.0