1 files changed, 30 insertions, 11 deletions

diff --git a/storage/innobase/srv/srv0start.cc b/storage/innobase/srv/srv0start.cc
index 1c2bfcbd920..d1be5be9238 100644
--- a/storage/innobase/srv/srv0start.cc
+++ b/storage/innobase/srv/srv0start.cc
@@ -1522,6 +1522,7 @@ innobase_start_or_create_for_mysql(void)
 	char		logfilename[10000];
 	char*		logfile0	= NULL;
 	size_t		dirnamelen;
+	bool		sys_datafiles_created = false;
 
 	if (srv_force_recovery > SRV_FORCE_NO_TRX_UNDO) {
 		srv_read_only_mode = true;
@@ -1647,6 +1648,19 @@ innobase_start_or_create_for_mysql(void)
 		"" IB_ATOMICS_STARTUP_MSG "");
 
 	ib_logf(IB_LOG_LEVEL_INFO,
+		"" IB_MEMORY_BARRIER_STARTUP_MSG "");
+
+#ifndef HAVE_MEMORY_BARRIER
+#if defined __i386__ || defined __x86_64__ || defined _M_IX86 || defined _M_X64 || defined __WIN__
+#else
+	ib_logf(IB_LOG_LEVEL_WARN,
+		"MySQL was built without a memory barrier capability on this"
+		" architecture, which might allow a mutex/rw_lock violation"
+		" under high thread concurrency. This may cause a hang.");
+#endif /* IA32 or AMD64 */
+#endif /* HAVE_MEMORY_BARRIER */
+
+	ib_logf(IB_LOG_LEVEL_INFO,
 		"Compressed tables use zlib " ZLIB_VERSION
 #ifdef UNIV_ZIP_DEBUG
 	      " with validation"
@@ -2448,6 +2462,15 @@ files_checked:
 				dict_check = DICT_CHECK_NONE_LOADED;
 			}
 
+			/* Create the SYS_TABLESPACES and SYS_DATAFILES system table */
+			err = dict_create_or_check_sys_tablespace();
+			if (err != DB_SUCCESS) {
+				return(err);
+			}
+
+			sys_datafiles_created = true;
+
+			/* This function assumes that SYS_DATAFILES exists */
 			dict_check_tablespaces_and_store_max_id(dict_check);
 		}
 
@@ -2621,13 +2644,6 @@ files_checked:
 		srv_undo_logs = ULONG_UNDEFINED;
 	}
 
-	/* Flush the changes made to TRX_SYS_PAGE by trx_sys_create_rsegs()*/
-	if (!srv_force_recovery && !srv_read_only_mode) {
-		bool success = buf_flush_list(ULINT_MAX, LSN_MAX, NULL);
-		ut_a(success);
-		buf_flush_wait_batch_end(NULL, BUF_FLUSH_LIST);
-	}
-
 	if (!srv_read_only_mode) {
 		/* Create the thread which watches the timeouts
 		for lock waits */
@@ -2652,10 +2668,13 @@ files_checked:
 		return(err);
 	}
 
-	/* Create the SYS_TABLESPACES system table */
-	err = dict_create_or_check_sys_tablespace();
-	if (err != DB_SUCCESS) {
-		return(err);
+	/* Create the SYS_TABLESPACES and SYS_DATAFILES system tables if we
+	have not done that already on crash recovery. */
+	if (sys_datafiles_created == false) {
+		err = dict_create_or_check_sys_tablespace();
+		if (err != DB_SUCCESS) {
+			return(err);
+		}
 	}
 
 	srv_is_being_started = FALSE;