1 files changed, 8 insertions, 0 deletions

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 45b6d53bcfbc..892d8a17a7e5 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -527,6 +527,14 @@ static int __init hugepage_init(void)
                 goto out;
         }
 
+        /*
+         * By default disable transparent hugepages on smaller systems,
+         * where the extra memory used could hurt more than TLB overhead
+         * is likely to save.  The admin can still enable it through /sys.
+         */
+        if (totalram_pages < (512 << (20 - PAGE_SHIFT)))
+                transparent_hugepage_flags = 0;
+
         start_khugepaged();
 
         set_recommended_min_free_kbytes();