3 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h
index 730334cdf037..9246d32dc973 100644
--- a/include/linux/vm_event_item.h
+++ b/include/linux/vm_event_item.h
@@ -90,6 +90,7 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
 #ifdef CONFIG_DEBUG_VM_VMACACHE
                 VMACACHE_FIND_CALLS,
                 VMACACHE_FIND_HITS,
+                VMACACHE_FULL_FLUSHES,
 #endif
                 NR_VM_EVENT_ITEMS
 };
diff --git a/mm/vmacache.c b/mm/vmacache.c
index 9f25af825dec..b6e3662fe339 100644
--- a/mm/vmacache.c
+++ b/mm/vmacache.c
@@ -17,6 +17,8 @@ void vmacache_flush_all(struct mm_struct *mm)
 {
         struct task_struct *g, *p;
 
+        count_vm_vmacache_event(VMACACHE_FULL_FLUSHES);
+
         /*
          * Single threaded tasks need not iterate the entire
          * list of process. We can avoid the flushing as well
diff --git a/mm/vmstat.c b/mm/vmstat.c
index b090e9e3d626..1284f89fca08 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -900,6 +900,7 @@ const char * const vmstat_text[] = {
 #ifdef CONFIG_DEBUG_VM_VMACACHE
         "vmacache_find_calls",
         "vmacache_find_hits",
+        "vmacache_full_flushes",
 #endif
 #endif /* CONFIG_VM_EVENTS_COUNTERS */
 };