diff --git a/include/linux/mm_event.h b/include/linux/mm_event.h
index 9f89ca038574..0ab3ea12c3d4 100644
--- a/include/linux/mm_event.h
+++ b/include/linux/mm_event.h
@@ -5,6 +5,7 @@
 enum mm_event_type {
 	MM_MIN_FAULT = 0,
 	MM_MAJ_FAULT,
+	MM_READ_IO,
 	MM_COMPACTION,
 	MM_RECLAIM,
 	MM_SWP_FAULT,
diff --git a/include/trace/events/mm_event.h b/include/trace/events/mm_event.h
index 7d69e42bc8bd..6073701d900c 100644
--- a/include/trace/events/mm_event.h
+++ b/include/trace/events/mm_event.h
@@ -14,6 +14,7 @@ struct mm_event_task;
 	__print_symbolic(type,                                          \
 	{ MM_MIN_FAULT, "min_flt" },                                    \
 	{ MM_MAJ_FAULT, "maj_flt" },                                    \
+	{ MM_READ_IO,	"read_io" },                                    \
 	{ MM_COMPACTION, "compaction" },                                \
 	{ MM_RECLAIM, "reclaim" },					\
 	{ MM_SWP_FAULT, "swp_flt" },					\
diff --git a/mm/filemap.c b/mm/filemap.c
index 4fc4dbf61f38..95d2f744b04b 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2190,6 +2190,7 @@ static ssize_t generic_file_buffered_read(struct kiocb *iocb,
 		pgoff_t end_index;
 		loff_t isize;
 		unsigned long nr, ret;
+		ktime_t event_ts = 0;
 
 		cond_resched();
 find_page:
@@ -2200,6 +2201,7 @@ find_page:
 
 		page = find_get_page(mapping, index);
 		if (!page) {
+			mm_event_start(&event_ts);
 			if (iocb->ki_flags & IOCB_NOWAIT)
 				goto would_block;
 			page_cache_sync_readahead(mapping,
@@ -2248,6 +2250,8 @@ find_page:
 			unlock_page(page);
 		}
 page_ok:
+		if (event_ts != 0)
+			mm_event_end(MM_READ_IO, event_ts);
 		/*
 		 * i_size must be checked after we know the page is Uptodate.
 		 *