mm,thp: add read-only THP support for (non-shmem) FS

[platform/kernel/linux-starfive.git] / mm / Kconfig

diff --git a/mm/Kconfig b/mm/Kconfig
index f88be1c..a5dae9a 100644 (file)
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -712,6 +712,17 @@ config GUP_BENCHMARK
 config GUP_GET_PTE_LOW_HIGH
        bool
 
+config READ_ONLY_THP_FOR_FS
+       bool "Read-only THP for filesystems (EXPERIMENTAL)"
+       depends on TRANSPARENT_HUGE_PAGECACHE && SHMEM
+
+       help
+         Allow khugepaged to put read-only file-backed pages in THP.
+
+         This is marked experimental because it is a new feature. Write
+         support of file THPs will be developed in the next few release
+         cycles.
+
 config ARCH_HAS_PTE_SPECIAL
        bool