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-rw-r--r--mm/huge_memory.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 45b6d53bcfb..892d8a17a7e 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();