2 files changed, 42 insertions, 0 deletions

diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h
index 0d358a0d45c1..aae16ee17601 100644
--- a/include/trace/events/kmem.h
+++ b/include/trace/events/kmem.h
@@ -299,6 +299,44 @@ TRACE_EVENT(mm_page_alloc,
                 show_gfp_flags(__entry->gfp_flags))
 );
 
+TRACE_EVENT(mm_page_alloc_extfrag,
+
+        TP_PROTO(struct page *page,
+                        int alloc_order, int fallback_order,
+                        int alloc_migratetype, int fallback_migratetype),
+
+        TP_ARGS(page,
+                alloc_order, fallback_order,
+                alloc_migratetype, fallback_migratetype),
+
+        TP_STRUCT__entry(
+                __field(        struct page *,  page                    )
+                __field(        int,            alloc_order             )
+                __field(        int,            fallback_order          )
+                __field(        int,            alloc_migratetype       )
+                __field(        int,            fallback_migratetype    )
+        ),
+
+        TP_fast_assign(
+                __entry->page                   = page;
+                __entry->alloc_order            = alloc_order;
+                __entry->fallback_order         = fallback_order;
+                __entry->alloc_migratetype      = alloc_migratetype;
+                __entry->fallback_migratetype   = fallback_migratetype;
+        ),
+
+        TP_printk("page=%p pfn=%lu alloc_order=%d fallback_order=%d pageblock_order=%d alloc_migratetype=%d fallback_migratetype=%d fragmenting=%d change_ownership=%d",
+                __entry->page,
+                page_to_pfn(__entry->page),
+                __entry->alloc_order,
+                __entry->fallback_order,
+                pageblock_order,
+                __entry->alloc_migratetype,
+                __entry->fallback_migratetype,
+                __entry->fallback_order < pageblock_order,
+                __entry->alloc_migratetype == __entry->fallback_migratetype)
+);
+
 #endif /* _TRACE_KMEM_H */
 
 /* This part must be outside protection */
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 80f954d82d77..77f517c18b37 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -853,6 +853,10 @@ __rmqueue_fallback(struct zone *zone, int order, int start_migratetype)
                                                         start_migratetype);
 
                         expand(zone, page, order, current_order, area, migratetype);
+
+                        trace_mm_page_alloc_extfrag(page, order, current_order,
+                                start_migratetype, migratetype);
+
                         return page;
                 }
         }