1 files changed, 15 insertions, 0 deletions

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 284f330d6a01..84ff5e75c084 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -263,6 +263,11 @@ static int min_sched_shares_ratelimit = 100000; /* 100 usec */
 static int max_sched_shares_ratelimit = NSEC_PER_SEC; /* 1 second */
 #endif
 
+#ifdef CONFIG_COMPACTION
+static int min_extfrag_threshold;
+static int max_extfrag_threshold = 1000;
+#endif
+
 static struct ctl_table kern_table[] = {
         {
                 .procname       = "sched_child_runs_first",
@@ -1130,6 +1135,16 @@ static struct ctl_table vm_table[] = {
                 .mode           = 0200,
                 .proc_handler   = sysctl_compaction_handler,
         },
+        {
+                .procname       = "extfrag_threshold",
+                .data           = &sysctl_extfrag_threshold,
+                .maxlen         = sizeof(int),
+                .mode           = 0644,
+                .proc_handler   = sysctl_extfrag_handler,
+                .extra1         = &min_extfrag_threshold,
+                .extra2         = &max_extfrag_threshold,
+        },
+
 #endif /* CONFIG_COMPACTION */
         {
                 .procname       = "min_free_kbytes",