mm: hugetlb: introduce CONFIG_HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON

[linux-2.6-microblaze.git] / fs / Kconfig

diff --git a/fs/Kconfig b/fs/Kconfig
index 58a5345..a7749c1 100644 (file)
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -245,6 +245,16 @@ config HUGETLB_PAGE_FREE_VMEMMAP
        depends on X86_64
        depends on SPARSEMEM_VMEMMAP
 
+config HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON
+       bool "Default freeing vmemmap pages of HugeTLB to on"
+       default n
+       depends on HUGETLB_PAGE_FREE_VMEMMAP
+       help
+         When using HUGETLB_PAGE_FREE_VMEMMAP, the freeing unused vmemmap
+         pages associated with each HugeTLB page is default off. Say Y here
+         to enable freeing vmemmap pages of HugeTLB by default. It can then
+         be disabled on the command line via hugetlb_free_vmemmap=off.
+
 config MEMFD_CREATE
        def_bool TMPFS || HUGETLBFS