2 files changed, 61 insertions, 60 deletions

diff --git a/include/linux/compaction.h b/include/linux/compaction.h
index 501d7513aac1..a014559e4a49 100644
--- a/include/linux/compaction.h
+++ b/include/linux/compaction.h
@@ -44,66 +44,11 @@ extern void reset_isolation_suitable(pg_data_t *pgdat);
 extern unsigned long compaction_suitable(struct zone *zone, int order,
                                         int alloc_flags, int classzone_idx);
 
-/* Do not skip compaction more than 64 times */
-#define COMPACT_MAX_DEFER_SHIFT 6
-
-/*
- * Compaction is deferred when compaction fails to result in a page
- * allocation success. 1 << compact_defer_limit compactions are skipped up
- * to a limit of 1 << COMPACT_MAX_DEFER_SHIFT
- */
-static inline void defer_compaction(struct zone *zone, int order)
-{
-        zone->compact_considered = 0;
-        zone->compact_defer_shift++;
-
-        if (order < zone->compact_order_failed)
-                zone->compact_order_failed = order;
-
-        if (zone->compact_defer_shift > COMPACT_MAX_DEFER_SHIFT)
-                zone->compact_defer_shift = COMPACT_MAX_DEFER_SHIFT;
-}
-
-/* Returns true if compaction should be skipped this time */
-static inline bool compaction_deferred(struct zone *zone, int order)
-{
-        unsigned long defer_limit = 1UL << zone->compact_defer_shift;
-
-        if (order < zone->compact_order_failed)
-                return false;
-
-        /* Avoid possible overflow */
-        if (++zone->compact_considered > defer_limit)
-                zone->compact_considered = defer_limit;
-
-        return zone->compact_considered < defer_limit;
-}
-
-/*
- * Update defer tracking counters after successful compaction of given order,
- * which means an allocation either succeeded (alloc_success == true) or is
- * expected to succeed.
- */
-static inline void compaction_defer_reset(struct zone *zone, int order,
-                bool alloc_success)
-{
-        if (alloc_success) {
-                zone->compact_considered = 0;
-                zone->compact_defer_shift = 0;
-        }
-        if (order >= zone->compact_order_failed)
-                zone->compact_order_failed = order + 1;
-}
-
-/* Returns true if restarting compaction after many failures */
-static inline bool compaction_restarting(struct zone *zone, int order)
-{
-        if (order < zone->compact_order_failed)
-                return false;
-
-        return zone->compact_defer_shift == COMPACT_MAX_DEFER_SHIFT &&
-                zone->compact_considered >= 1UL << zone->compact_defer_shift;
-}
+extern void defer_compaction(struct zone *zone, int order);
+extern bool compaction_deferred(struct zone *zone, int order);
+extern void compaction_defer_reset(struct zone *zone, int order,
+                                bool alloc_success);
+extern bool compaction_restarting(struct zone *zone, int order);
 
 #else
 static inline unsigned long try_to_compact_pages(gfp_t gfp_mask,
diff --git a/include/trace/events/compaction.h b/include/trace/events/compaction.h
index d46535801f63..9a6a3fe0fb51 100644
--- a/include/trace/events/compaction.h
+++ b/include/trace/events/compaction.h
@@ -238,6 +238,62 @@ DEFINE_EVENT(mm_compaction_suitable_template, mm_compaction_suitable,
         TP_ARGS(zone, order, ret)
 );
 
+#ifdef CONFIG_COMPACTION
+DECLARE_EVENT_CLASS(mm_compaction_defer_template,
+
+        TP_PROTO(struct zone *zone, int order),
+
+        TP_ARGS(zone, order),
+
+        TP_STRUCT__entry(
+                __field(int, nid)
+                __field(char *, name)
+                __field(int, order)
+                __field(unsigned int, considered)
+                __field(unsigned int, defer_shift)
+                __field(int, order_failed)
+        ),
+
+        TP_fast_assign(
+                __entry->nid = zone_to_nid(zone);
+                __entry->name = (char *)zone->name;
+                __entry->order = order;
+                __entry->considered = zone->compact_considered;
+                __entry->defer_shift = zone->compact_defer_shift;
+                __entry->order_failed = zone->compact_order_failed;
+        ),
+
+        TP_printk("node=%d zone=%-8s order=%d order_failed=%d consider=%u limit=%lu",
+                __entry->nid,
+                __entry->name,
+                __entry->order,
+                __entry->order_failed,
+                __entry->considered,
+                1UL << __entry->defer_shift)
+);
+
+DEFINE_EVENT(mm_compaction_defer_template, mm_compaction_deferred,
+
+        TP_PROTO(struct zone *zone, int order),
+
+        TP_ARGS(zone, order)
+);
+
+DEFINE_EVENT(mm_compaction_defer_template, mm_compaction_defer_compaction,
+
+        TP_PROTO(struct zone *zone, int order),
+
+        TP_ARGS(zone, order)
+);
+
+DEFINE_EVENT(mm_compaction_defer_template, mm_compaction_defer_reset,
+
+        TP_PROTO(struct zone *zone, int order),
+
+        TP_ARGS(zone, order)
+);
+#endif
+
 #endif /* _TRACE_COMPACTION_H */
 
 /* This part must be outside protection */