Hello
@@ -264,6 +266,12 @@ typedef struct PgStat_KindInfo
/* Flush behavior */
PgStat_FlushBehavior flush_behavior;
+ /*
+ * For PGSTAT_FLUSH_MIXED kinds: callback to flush only some fields. If
+ * NULL for a MIXED kind, treated as PGSTAT_FLUSH_AT_TXN_BOUNDARY.
+ */
+ bool (*flush_anytime_cb) (PgStat_EntryRef *entry_ref, bool nowait);
+
The comment seems to use incorrect names, shouldn't be FLUSH_MIXED and
FLUSH_AT_TXN_BOUNDARY without PGSTAT_?
