Add opt.thp which allows explicit hugepage usage.

"always" marks all user mappings as MADV_HUGEPAGE; while "never" marks all
mappings as MADV_NOHUGEPAGE. The default setting "default" does not change any
settings.  Note that all the madvise calls are part of the default extent hooks
by design, so that customized extent hooks have complete control over the
mappings including hugepage settings.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/base.c b/src/base.c
index cc3d9781..bb897a25 100644
--- a/src/base.c
+++ b/src/base.c
@@ -24,7 +24,8 @@ const char *metadata_thp_mode_names[] = {
 
 static inline bool
 metadata_thp_madvise(void) {
-	return (metadata_thp_enabled() && thp_state_madvise);
+	return (metadata_thp_enabled() &&
+	    (init_system_thp_mode == thp_mode_default));
 }
 
 static void *