Cleanup VirtualXact at end of Hot Standby

Resolves bug 7572 reported by Daniele Varrazzo

src/backend/storage/ipc/standby.c

@@ -103,6 +103,9 @@ ShutdownRecoveryTransactionEnvironment(void)
 
 	/* Release all locks the tracked transactions were holding */
 	StandbyReleaseAllLocks();
+
+	/* Cleanup our VirtualTransaction */
+	VirtualXactLockTableCleanup();
 }
 
 

src/backend/storage/lmgr/lock.c

@@ -209,7 +209,6 @@ static bool FastPathUnGrantRelationLock(Oid relid, LOCKMODE lockmode);
 static bool FastPathTransferRelationLocks(LockMethod lockMethodTable,
 							  const LOCKTAG *locktag, uint32 hashcode);
 static PROCLOCK *FastPathGetRelationLockEntry(LOCALLOCK *locallock);
-static void VirtualXactLockTableCleanup(void);
 
 /*
  * To make the fast-path lock mechanism work, we must have some way of
@@ -3734,7 +3733,7 @@ VirtualXactLockTableInsert(VirtualTransactionId vxid)
  *		Check whether a VXID lock has been materialized; if so, release it,
  *		unblocking waiters.
  */
-static void
+void
 VirtualXactLockTableCleanup()
 {
 	bool		fastpath;

src/include/storage/lock.h

@@ -544,6 +544,7 @@ extern void DumpAllLocks(void);
 
 /* Lock a VXID (used to wait for a transaction to finish) */
 extern void VirtualXactLockTableInsert(VirtualTransactionId vxid);
+extern void VirtualXactLockTableCleanup(void);
 extern bool VirtualXactLock(VirtualTransactionId vxid, bool wait);
 
 #endif   /* LOCK_H */