[PATCH] mm/huge_memory: add TRANSPARENT_HUGEPAGE_NEVER for THP

ye.xingchen
2022-11-30T08:52:14Z

From: ye xingchen <ye.xingchen@zte.com.cn>

Sometimes we may need the /sys/kernel/mm/transparent_hugepage/enabled to
default as [never] at the first time.

Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
---
mm/Kconfig | 5 +++++
mm/huge_memory.c | 2 ++
2 files changed, 7 insertions(+)

diff --git a/mm/Kconfig b/mm/Kconfig
index ff7b209dec05..ded8c1da6267 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -797,6 +797,11 @@ choice
madvise(MADV_HUGEPAGE) but it won't risk to increase the
memory footprint of applications without a guaranteed
benefit.
+
+ config TRANSPARENT_HUGEPAGE_NEVER
+ bool "never"
+ help
+ Disabling Transparent Hugepage.
endchoice

config THP_SWAP
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index c0c57828110d..3571417aa70a 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -60,6 +60,8 @@ unsigned long transparent_hugepage_flags __read_mostly =
#endif
#ifdef CONFIG_TRANSPARENT_HUGEPAGE_MADVISE
(1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG)|
+#endif
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE_NEVER
#endif
(1<<TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG)|
(1<<TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG)|
--
2.25.1