Fix Bug #12941439 - WITH UNIV_SYNC_DEBUG, PERF SCHEMA, INITIALIZATION

OF 16G BUFFER POOL TAKES HOURS

rb://787 approved by Sunny

storage/innobase/buf/buf0buf.c

@@ -839,6 +839,16 @@ pfs_register_buffer_block(
 		rwlock->pfs_psi = (PSI_server)
 			? PSI_server->init_rwlock(buf_block_lock_key, rwlock)
 			: NULL;
+
+#   ifdef UNIV_SYNC_DEBUG
+		rwlock = &block->debug_latch;
+		ut_a(!rwlock->pfs_psi);
+		rwlock->pfs_psi = (PSI_server)
+			? PSI_server->init_rwlock(buf_block_debug_latch_key,
+						  rwlock)
+			: NULL;
+#   endif /* UNIV_SYNC_DEBUG */
+
 #  endif /* UNIV_PFS_RWLOCK */
 		block++;
 	}
@@ -895,17 +905,24 @@ buf_block_init(
 
 	mutex_create(PFS_NOT_INSTRUMENTED, &block->mutex, SYNC_BUF_BLOCK);
 	rw_lock_create(PFS_NOT_INSTRUMENTED, &block->lock, SYNC_LEVEL_VARYING);
+
+# ifdef UNIV_SYNC_DEBUG
+	rw_lock_create(PFS_NOT_INSTRUMENTED,
+		       &block->debug_latch, SYNC_NO_ORDER_CHECK);
+# endif /* UNIV_SYNC_DEBUG */
+
 #else /* PFS_SKIP_BUFFER_MUTEX_RWLOCK || PFS_GROUP_BUFFER_SYNC */
 	mutex_create(buffer_block_mutex_key, &block->mutex, SYNC_BUF_BLOCK);
 	rw_lock_create(buf_block_lock_key, &block->lock, SYNC_LEVEL_VARYING);
+
+# ifdef UNIV_SYNC_DEBUG
+	rw_lock_create(buf_block_debug_latch_key,
+		       &block->debug_latch, SYNC_NO_ORDER_CHECK);
+# endif /* UNIV_SYNC_DEBUG */
 #endif /* PFS_SKIP_BUFFER_MUTEX_RWLOCK || PFS_GROUP_BUFFER_SYNC */
 
 	ut_ad(rw_lock_validate(&(block->lock)));
 
-#ifdef UNIV_SYNC_DEBUG
-	rw_lock_create(buf_block_debug_latch_key,
-		       &block->debug_latch, SYNC_NO_ORDER_CHECK);
-#endif /* UNIV_SYNC_DEBUG */
 }
 
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