diff --git a/Makefile.am b/Makefile.am
index 3f46f059fc0..a68dbbcc2e6 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -17,10 +17,20 @@
 
 # Process this file with automake to create Makefile.in
 
+MYSQLDATAdir =          $(localstatedir)
+MYSQLSHAREdir =         $(pkgdatadir)
+MYSQLBASEdir=           $(prefix)
+MYSQLLIBdir=            $(pkglibdir)
+INCLUDES =              -I$(top_srcdir)/include -I$(top_builddir)/include \
+			-I$(top_srcdir)/regex \
+			-I$(top_srcdir)/storage/innobase/include \
+			-I$(top_srcdir)/sql \
+                        -I$(srcdir)
+
 AUTOMAKE_OPTIONS =	foreign
 TAR =			gtar
 
-noinst_HEADERS = ib_config.h
+noinst_HEADERS = 
 
 SUBDIRS =		os ut btr buf data dict dyn eval fil fsp fut \
 			ha ibuf lock log mach mem mtr page \
@@ -77,7 +87,8 @@ EXTRA_DIST = 	include/btr0btr.h include/btr0btr.ic include/btr0cur.h include/btr
 		include/ut0byte.h include/ut0byte.ic include/ut0dbg.h include/ut0lst.h \
 		include/ut0mem.h include/ut0mem.ic include/ut0rnd.h include/ut0rnd.ic \
 		include/ut0sort.h include/ut0ut.h include/ut0ut.ic include/ut0vec.h include/ut0vec.ic include/ha_prototypes.h \
-		include/ut0list.h include/ut0list.ic include/ut0wqueue.h \
+		include/ut0list.h include/ut0list.ic \
+		include/ut0wqueue.h \
 		CMakeLists.txt
 
 noinst_LIBRARIES =	libinnobase.a
diff --git a/compile-innodb b/compile-innodb
index 31178c8aac0..027ff727af0 100755
--- a/compile-innodb
+++ b/compile-innodb
@@ -3,10 +3,7 @@
 path=`dirname $0`
 . "$path/SETUP.sh"
 
-extra_flags="$pentium_cflags $fast_cflags"
-extra_configs="$pentium_configs"
-strip=yes
-
-extra_configs="$extra_configs --with-innodb"
+extra_flags="$pentium_cflags $fast_cflags -g"
+extra_configs="$pentium_configs $static_link --with-plugins=innobase"
 
 . "$path/FINISH.sh"
diff --git a/compile-innodb-debug b/compile-innodb-debug
index 399cd40006f..d179c9453ce 100755
--- a/compile-innodb-debug
+++ b/compile-innodb-debug
@@ -4,10 +4,6 @@ path=`dirname $0`
 . "$path/SETUP.sh" $@ --with-debug=full
 
 extra_flags="$pentium_cflags $debug_cflags"
-c_warnings="$c_warnings $debug_extra_warnings"
-cxx_warnings="$cxx_warnings $debug_extra_warnings"
-extra_configs="$pentium_configs $debug_configs "
-
-extra_configs="$extra_configs --with-innodb"
+extra_configs="$pentium_configs $debug_configs --with-plugins=innobase"
 
 . "$path/FINISH.sh"
diff --git a/configure.in b/configure.in
deleted file mode 100644
index 4aaa28da89e..00000000000
--- a/configure.in
+++ /dev/null
@@ -1,156 +0,0 @@
-# Process this file with autoconf to produce a configure script
-AC_INIT
-AC_CANONICAL_SYSTEM
-AM_MAINTAINER_MODE
-AM_CONFIG_HEADER(ib_config.h)
-AM_INIT_AUTOMAKE(ib, 0.90)
-
-# This is need before AC_PROG_CC
-#
-
-if test "x${CFLAGS-}" = x ; then
-  cflags_is_set=no
-else
-  cflags_is_set=yes
-fi
-
-if test "x${CPPFLAGS-}" = x ; then
-  cppflags_is_set=no
-else
-  cppflags_is_set=yes
-fi
-
-if test "x${LDFLAGS-}" = x ; then
-  ldflags_is_set=no
-else
-  ldflags_is_set=yes
-fi
-
-# The following hack should ensure that configure doesn't add optimizing
-# or debugging flags to CFLAGS or CXXFLAGS
-CFLAGS="$CFLAGS "
-CXXFLAGS="$CXXFLAGS "
-
-AC_PROG_CC
-AC_PROG_RANLIB
-AC_PROG_INSTALL
-AC_PROG_LIBTOOL
-AC_CHECK_HEADERS(aio.h sched.h)
-AC_CHECK_SIZEOF(int, 4)
-AC_CHECK_SIZEOF(long, 4)
-AC_CHECK_SIZEOF(void*, 4)
-AC_CHECK_FUNCS(sched_yield)
-AC_CHECK_FUNCS(fdatasync)
-AC_CHECK_FUNCS(localtime_r)
-#AC_CHECK_FUNCS(readdir_r) MySQL checks that it has also the right args.
-# Some versions of Unix only take 2 arguments.
-#AC_C_INLINE  Already checked in MySQL
-AC_C_BIGENDIAN
-
-# Build optimized or debug version ?
-# First check for gcc and g++
-if test "$ac_cv_prog_gcc" = "yes"
-then
-  DEBUG_CFLAGS="-g"
-  DEBUG_OPTIMIZE_CC="-O"
-  OPTIMIZE_CFLAGS="$MAX_C_OPTIMIZE"
-else
-  DEBUG_CFLAGS="-g"
-  DEBUG_OPTIMIZE_CC=""
-  OPTIMIZE_CFLAGS="-O"
-fi
-if test "$ac_cv_prog_cxx_g" = "yes"
-then
-  DEBUG_CXXFLAGS="-g"
-  DEBUG_OPTIMIZE_CXX="-O"
-  OPTIMIZE_CXXFLAGS="-O3"
-else
-  DEBUG_CXXFLAGS="-g"
-  DEBUG_OPTIMIZE_CXX=""
-  OPTIMIZE_CXXFLAGS="-O"
-fi
-AC_ARG_WITH(debug,
-    [  --without-debug         Build a production version without debugging code],
-    [with_debug=$withval],
-    [with_debug=no])
-if test "$with_debug" = "yes"
-then
-  # Medium debug.
-  CFLAGS="$DEBUG_CFLAGS $DEBUG_OPTIMIZE_CC -DDBUG_ON -DSAFE_MUTEX $CFLAGS"
-  CXXFLAGS="$DEBUG_CXXFLAGS $DEBUG_OPTIMIZE_CXX -DSAFE_MUTEX $CXXFLAGS"
-elif test "$with_debug" = "full"
-then
-  # Full debug. Very slow in some cases
-  CFLAGS="$DEBUG_CFLAGS -DDBUG_ON -DSAFE_MUTEX -DSAFEMALLOC $CFLAGS"
-  CXXFLAGS="$DEBUG_CXXFLAGS -DSAFE_MUTEX -DSAFEMALLOC $CXXFLAGS"
-else
-  # Optimized version. No debug
-  CFLAGS="$OPTIMIZE_CFLAGS -DDBUG_OFF $CFLAGS -DDEBUG_OFF"
-  CXXFLAGS="$OPTIMIZE_CXXFLAGS -DDBUG_OFF $CXXFLAGS -DDEBUG_OFF"
-fi
-
-# NOTE: The flags below are disabled by default since we can't easily get
-# rid of the "string over 509 characters in length" warnings, and thus can't
-# add -Werror. But it's a good idea to enable these for a test compile
-# before shipping a new snapshot to MySQL to catch errors that could make
-# the compile fail on non-C99 compilers.
-
-# If using gcc, disallow usage of C99 features to avoid accidentally
-# introducing problems on compilers that only implement C89.
-#if test "$ac_cv_prog_gcc" = "yes"
-#then
-#  CFLAGS="$CFLAGS -std=c89 -ansi -pedantic -Wno-long-long"
-#fi
-
-# If using gcc, add some extra warning flags.
-if test "$ac_cv_prog_gcc" = "yes"
-then
-  CFLAGS="$CFLAGS -Werror-implicit-function-declaration -Wpointer-arith"
-fi
-
-case "$target_os" in
-       lin*)
-	 CFLAGS="$CFLAGS -DUNIV_LINUX";;
-       hpux10*)
-	 CFLAGS="$CFLAGS -DUNIV_MUST_NOT_INLINE -DUNIV_HPUX -DUNIV_HPUX10";;
-       hp*)
-	 CFLAGS="$CFLAGS -DUNIV_MUST_NOT_INLINE -DUNIV_HPUX";;
-       aix*)
-         CFLAGS="$CFLAGS -DUNIV_AIX";;
-       irix*)
-	 CFLAGS="$CFLAGS -DUNIV_MUST_NOT_INLINE";;
-       osf*)
-	 CFLAGS="$CFLAGS -DUNIV_MUST_NOT_INLINE";;
-       sysv5uw7*)
-	 # Problem when linking on SCO
-	 CFLAGS="$CFLAGS -DUNIV_MUST_NOT_INLINE";;
-       openbsd*)
-         CFLAGS="$CFLAGS -DUNIV_MUST_NOT_INLINE";;
-esac
-
-case "$target" in
-       i[[4567]]86-*-*)
-	 CFLAGS="$CFLAGS -DUNIV_INTEL_X86";;
-	 # The compiler on Linux/S390 does not seem to have inlining
-       s390-*-*)
-	 CFLAGS="$CFLAGS -DUNIV_MUST_NOT_INLINE";;
-esac
-
-# must go in pair with AR as set by MYSQL_CHECK_AR
-if test -z "$ARFLAGS"
-then
-  ARFLAGS="cru"
-fi
-AC_SUBST(ARFLAGS)
-
-AC_OUTPUT(Makefile os/Makefile ut/Makefile btr/Makefile dnl
-		buf/Makefile data/Makefile dnl
-		dict/Makefile dyn/Makefile dnl
-		eval/Makefile fil/Makefile fsp/Makefile fut/Makefile dnl
-		ha/Makefile ibuf/Makefile dnl
-		lock/Makefile log/Makefile dnl
-		mach/Makefile mem/Makefile mtr/Makefile dnl
-		page/Makefile pars/Makefile que/Makefile dnl
-		read/Makefile rem/Makefile row/Makefile dnl
-		srv/Makefile sync/Makefile thr/Makefile trx/Makefile dnl
-		usr/Makefile)
diff --git a/handler/ha_innodb.cc b/handler/ha_innodb.cc
index 8d5774313e5..0513445b9a8 100644
--- a/handler/ha_innodb.cc
+++ b/handler/ha_innodb.cc
@@ -42,8 +42,6 @@ have disables the InnoDB inlining in this file. */
 
 #define MAX_ULONG_BIT ((ulong) 1 << (sizeof(ulong)*8-1))
 
-#ifdef WITH_INNOBASE_STORAGE_ENGINE
-
 #include "ha_innodb.h"
 
 pthread_mutex_t innobase_share_mutex,	/* to protect innobase_open_files */
@@ -312,7 +310,8 @@ SHOW_VAR innodb_status_variables[]= {
   (char*) &export_vars.innodb_rows_read,		  SHOW_LONG},
   {"rows_updated",
   (char*) &export_vars.innodb_rows_updated,		  SHOW_LONG},
-  {NullS, NullS, SHOW_LONG}};
+  {NullS, NullS, SHOW_LONG}
+};
 
 /* General functions */
 
@@ -6798,19 +6797,17 @@ ha_innobase::store_lock(
 	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
 	trx_t*		trx;
 
-	/* Call update_thd() to update prebuilt->trx to point to the trx
-	object of thd! Failure to do this caused a serious memory
-	corruption bug in 5.1.11. */
+	/* Note that trx in this function is NOT necessarily prebuilt->trx
+	because we call update_thd() later, in ::external_lock()! Failure to
+	understand this caused a serious memory corruption bug in 5.1.11. */
 
-	update_thd(thd);
+	trx = check_trx_exists(thd);
 
-	trx = prebuilt->trx;
-
-	/* NOTE: MySQL	can call this function with lock 'type' TL_IGNORE!
+	/* NOTE: MySQL can call this function with lock 'type' TL_IGNORE!
 	Be careful to ignore TL_IGNORE if we are going to do something with
 	only 'real' locks! */
 
-	/* If no MySQL tables is use we need to set isolation level
+	/* If no MySQL table is in use, we need to set the isolation level
 	of the transaction. */
 
 	if (lock_type != TL_IGNORE
@@ -6820,7 +6817,13 @@ ha_innobase::store_lock(
 						thd->variables.tx_isolation);
 	}
 
-	if ((lock_type == TL_READ && thd->in_lock_tables) ||
+	if (thd->lex->sql_command == SQLCOM_DROP_TABLE) {
+
+		/* MySQL calls this function in DROP TABLE though this table
+		handle may belong to another thd that is running a query. Let
+		us in that case skip any changes to the prebuilt struct. */ 
+
+	} else if ((lock_type == TL_READ && thd->in_lock_tables) ||
 		(lock_type == TL_READ_HIGH_PRIORITY && thd->in_lock_tables) ||
 		lock_type == TL_READ_WITH_SHARED_LOCKS ||
 		lock_type == TL_READ_NO_INSERT ||
@@ -7078,10 +7081,16 @@ ha_innobase::innobase_read_and_init_auto_inc(
 		'found_next_number_field' below because MySQL in SHOW TABLE
 		STATUS does not seem to set 'next_number_field'. The comment
 		in table.h says that 'next_number_field' is set when it is
-		'active'. */
+		'active'.
+		Since 5.1 MySQL enforces that we announce fields which we will
+		read; as we only do a val_*() call, dbug_tmp_use_all_columns()
+		with read_set is sufficient. */
 
+		my_bitmap_map *old_map;
+		old_map= dbug_tmp_use_all_columns(table, table->read_set);
 		auto_inc = (longlong) table->found_next_number_field->
 				val_int_offset(table->s->rec_buff_length) + 1;
+		dbug_tmp_restore_column_map(table->read_set, old_map);
 	}
 
 	dict_table_autoinc_initialize(prebuilt->table, auto_inc);
@@ -7619,6 +7628,19 @@ bool ha_innobase::check_if_incompatible_data(
 	return COMPATIBLE_DATA_YES;
 }
 
+static int show_innodb_vars(THD *thd, SHOW_VAR *var, char *buff)
+{
+  innodb_export_status();
+  var->type= SHOW_ARRAY;
+  var->value= (char *) &innodb_status_variables;
+  return 0;
+}
+
+SHOW_VAR innodb_status_variables_export[]= {
+  {"Innodb",                   (char*) &show_innodb_vars, SHOW_FUNC},
+  {NullS, NullS, SHOW_LONG}
+};
+
 struct st_mysql_storage_engine innobase_storage_engine=
 { MYSQL_HANDLERTON_INTERFACE_VERSION, &innobase_hton};
 
@@ -7632,9 +7654,7 @@ mysql_declare_plugin(innobase)
   innobase_init, /* Plugin Init */
   NULL, /* Plugin Deinit */
   0x0100 /* 1.0 */,
-  0
+  innodb_status_variables_export
 }
 mysql_declare_plugin_end;
 
-#endif
-
diff --git a/handler/ha_innodb.h b/handler/ha_innodb.h
index ba8560f717f..4d5dc6b52d6 100644
--- a/handler/ha_innodb.h
+++ b/handler/ha_innodb.h
@@ -227,12 +227,6 @@ extern my_bool innobase_log_archive,
 	innobase_use_native_aio,
 	innobase_file_per_table, innobase_locks_unsafe_for_binlog,
 	innobase_create_status_file;
-extern my_bool innobase_very_fast_shutdown;	/* set this to 1 just before
-						calling innobase_end() if
-						you want InnoDB to shut down
-						without flushing the buffer
-						pool: this is equivalent to
-						a 'crash' */
 extern "C" {
 extern ulong srv_max_buf_pool_modified_pct;
 extern ulong srv_max_purge_lag;
diff --git a/include/Makefile.i b/include/Makefile.i
index 87952a7abc8..db436c702ff 100644
--- a/include/Makefile.i
+++ b/include/Makefile.i
@@ -1,6 +1,10 @@
 # Makefile included in Makefile.am in every subdirectory
 
-INCLUDES =		-I$(top_srcdir)/include -I$(top_srcdir)/../../include
+INCLUDES =              -I$(top_srcdir)/include -I$(top_builddir)/include \
+			-I$(top_srcdir)/regex \
+			-I$(top_srcdir)/storage/innobase/include \
+			-I$(top_srcdir)/sql \
+                        -I$(srcdir)
 
 # Don't update the files from bitkeeper
 %::SCCS/s.%
diff --git a/include/row0row.h b/include/row0row.h
index fd934b3db18..bf6ac5975a5 100644
--- a/include/row0row.h
+++ b/include/row0row.h
@@ -71,10 +71,9 @@ dtuple_t*
 row_build(
 /*======*/
 				/* out, own: row built; see the NOTE below! */
-	ulint		type,	/* in: ROW_COPY_POINTERS, ROW_COPY_DATA, or
-				ROW_COPY_ALSO_EXTERNALS,
-				the two last copy also the data fields to
-				heap as the first only places pointers to
+	ulint		type,	/* in: ROW_COPY_POINTERS or ROW_COPY_DATA;
+				the latter copies also the data fields to
+				heap while the first only places pointers to
 				data fields on the index page, and thus is
 				more efficient */
 	dict_index_t*	index,	/* in: clustered index */
@@ -226,7 +225,6 @@ row_search_index_entry(
 
 #define ROW_COPY_DATA		1
 #define ROW_COPY_POINTERS	2
-#define ROW_COPY_ALSO_EXTERNALS	3
 
 /* The allowed latching order of index records is the following:
 (1) a secondary index record ->
diff --git a/include/univ.i b/include/univ.i
index 41aece6bd43..9ee1f582846 100644
--- a/include/univ.i
+++ b/include/univ.i
@@ -41,7 +41,7 @@ if we are compiling on Windows. */
 
 /* Include the header file generated by GNU autoconf */
 #ifndef __WIN__
-#include "../ib_config.h"
+#include "config.h"
 #endif
 
 #ifdef HAVE_SCHED_H
@@ -98,8 +98,6 @@ memory is read outside the allocated blocks. */
 #define UNIV_BTR_DEBUG
 #define UNIV_LIGHT_MEM_DEBUG
 
-#define YYDEBUG			1
-
 #ifdef HAVE_purify
 /* The following sets all new allocated memory to zero before use:
 this can be used to eliminate unnecessary Purify warnings, but note that
diff --git a/plug.in b/plug.in
new file mode 100644
index 00000000000..fc1d758fd87
--- /dev/null
+++ b/plug.in
@@ -0,0 +1,70 @@
+MYSQL_STORAGE_ENGINE(innobase,  innodb, [InnoDB Storage Engine],
+        [Transactional Tables using InnoDB], [max,max-no-ndb])
+MYSQL_PLUGIN_DIRECTORY(innobase, [storage/innobase])
+MYSQL_PLUGIN_STATIC(innobase,   [libinnobase.a])
+MYSQL_PLUGIN_ACTIONS(innobase,  [
+  AC_CHECK_LIB(rt, aio_read, [innodb_system_libs="-lrt"])
+  AC_SUBST(innodb_system_libs)
+  AC_PROG_CC
+  AC_PROG_RANLIB
+  AC_PROG_INSTALL
+  AC_PROG_LIBTOOL
+  AC_CHECK_HEADERS(aio.h sched.h)
+  AC_CHECK_SIZEOF(int, 4)
+  AC_CHECK_SIZEOF(long, 4)
+  AC_CHECK_SIZEOF(void*, 4)
+  AC_CHECK_FUNCS(sched_yield)
+  AC_CHECK_FUNCS(fdatasync)
+  AC_CHECK_FUNCS(localtime_r)
+  AC_C_BIGENDIAN
+  case "$target_os" in
+         lin*)
+           CFLAGS="$CFLAGS -DUNIV_LINUX";;
+         hpux10*)
+           CFLAGS="$CFLAGS -DUNIV_MUST_NOT_INLINE -DUNIV_HPUX -DUNIV_HPUX10";;
+         hp*)
+           CFLAGS="$CFLAGS -DUNIV_MUST_NOT_INLINE -DUNIV_HPUX";;
+         aix*)
+           CFLAGS="$CFLAGS -DUNIV_AIX";;
+         irix*)
+           CFLAGS="$CFLAGS -DUNIV_MUST_NOT_INLINE";;
+         osf*)
+           CFLAGS="$CFLAGS -DUNIV_MUST_NOT_INLINE";;
+         sysv5uw7*)
+           # Problem when linking on SCO
+           CFLAGS="$CFLAGS -DUNIV_MUST_NOT_INLINE";;
+         openbsd*)
+           CFLAGS="$CFLAGS -DUNIV_MUST_NOT_INLINE";;
+  esac
+  AC_CONFIG_FILES(
+      storage/innobase/ut/Makefile
+      storage/innobase/btr/Makefile
+      storage/innobase/buf/Makefile
+      storage/innobase/data/Makefile
+      storage/innobase/dict/Makefile
+      storage/innobase/dyn/Makefile
+      storage/innobase/eval/Makefile
+      storage/innobase/fil/Makefile
+      storage/innobase/fsp/Makefile
+      storage/innobase/fut/Makefile
+      storage/innobase/ha/Makefile
+      storage/innobase/ibuf/Makefile
+      storage/innobase/lock/Makefile
+      storage/innobase/log/Makefile
+      storage/innobase/mach/Makefile
+      storage/innobase/mem/Makefile
+      storage/innobase/mtr/Makefile
+      storage/innobase/os/Makefile
+      storage/innobase/page/Makefile
+      storage/innobase/pars/Makefile
+      storage/innobase/que/Makefile
+      storage/innobase/read/Makefile
+      storage/innobase/rem/Makefile
+      storage/innobase/row/Makefile
+      storage/innobase/srv/Makefile
+      storage/innobase/sync/Makefile
+      storage/innobase/thr/Makefile
+      storage/innobase/trx/Makefile
+      storage/innobase/usr/Makefile)
+  ])
+
diff --git a/row/row0row.c b/row/row0row.c
index 39be772654e..b92b757c6e4 100644
--- a/row/row0row.c
+++ b/row/row0row.c
@@ -130,10 +130,9 @@ dtuple_t*
 row_build(
 /*======*/
 				/* out, own: row built; see the NOTE below! */
-	ulint		type,	/* in: ROW_COPY_POINTERS, ROW_COPY_DATA, or
-				ROW_COPY_ALSO_EXTERNALS,
-				the two last copy also the data fields to
-				heap as the first only places pointers to
+	ulint		type,	/* in: ROW_COPY_POINTERS or ROW_COPY_DATA;
+				the latter copies also the data fields to
+				heap while the first only places pointers to
 				data fields on the index page, and thus is
 				more efficient */
 	dict_index_t*	index,	/* in: clustered index */
@@ -205,15 +204,6 @@ row_build(
 						      dict_col_get_no(col));
 			field = rec_get_nth_field(rec, offsets, i, &len);
 
-			if (type == ROW_COPY_ALSO_EXTERNALS
-			    && rec_offs_nth_extern(offsets, i)) {
-
-				field = btr_rec_copy_externally_stored_field
-					(rec, offsets,
-					 dict_table_zip_size(table),
-					 i, &len, heap);
-			}
-
 			dfield_set_data(dfield, field, len);
 		}
 	}
diff --git a/setup.sh b/setup.sh
index d95be2bd9e2..57ab3c68c90 100755
--- a/setup.sh
+++ b/setup.sh
@@ -12,8 +12,8 @@ TARGETDIR=../storage/innobase
 rm -fr "$TARGETDIR"
 mkdir "$TARGETDIR"
 
-# copy the build scripts
-cp compile-innodb* ../BUILD
+# link the build scripts
+ln -sf ../innodb/compile-innodb{,-debug} ../BUILD
 
 # create the directories
 for dir in */
@@ -35,7 +35,7 @@ do
   ln -s ../../../innodb/"$dir"* .
   cd ..
 done
-for file in configure.in Makefile.am CMakeLists.txt
+for file in plug.in Makefile.am CMakeLists.txt
 do
   ln -s ../../innodb/"$file" .
 done
diff --git a/srv/srv0srv.c b/srv/srv0srv.c
index 17d9946d97a..b781a601039 100644
--- a/srv/srv0srv.c
+++ b/srv/srv0srv.c
@@ -2587,6 +2587,10 @@ suspend_thread:
 
 	mutex_exit(&kernel_mutex);
 
+	/* DO NOT CHANGE THIS STRING. innobase_start_or_create_for_mysql()
+	waits for database activity to die down when converting < 4.1.x
+	databases, and relies on this string being exactly as it is. InnoDB
+	manual also mentions this string in several places. */
 	srv_main_thread_op_info = "waiting for server activity";
 
 	os_event_wait(event);
diff --git a/trx/trx0sys.c b/trx/trx0sys.c
index 9d56e7fbd10..d8b5c33d65f 100644
--- a/trx/trx0sys.c
+++ b/trx/trx0sys.c
@@ -853,6 +853,12 @@ trx_sysf_create(
 			   mtr);
 	ut_a(buf_frame_get_page_no(page) == TRX_SYS_PAGE_NO);
 
+	/* Reset the doublewrite buffer magic number to zero so that we
+	know that the doublewrite buffer has not yet been created (this
+	suppresses a Valgrind warning) */
+
+	mach_write_to_4(page + TRX_SYS_DOUBLEWRITE + TRX_SYS_DOUBLEWRITE_MAGIC,
+			0);
 #ifdef UNIV_SYNC_DEBUG
 	buf_page_dbg_add_level(page, SYNC_TRX_SYS_HEADER);
 #endif /* UNIV_SYNC_DEBUG */