diff --git a/poky/scripts/devtool b/poky/scripts/devtool
index af4811b..20d785c 100755
--- a/poky/scripts/devtool
+++ b/poky/scripts/devtool
@@ -104,6 +104,7 @@
     for fn in glob.glob(os.path.join(config.workspace_path, 'appends', '*.bbappend')):
         with open(fn, 'r') as f:
             pnvalues = {}
+            pn = None
             for line in f:
                 res = externalsrc_re.match(line.rstrip())
                 if res:
@@ -123,6 +124,9 @@
                 elif line.startswith('# srctreebase: '):
                     pnvalues['srctreebase'] = line.split(':', 1)[1].strip()
             if pnvalues:
+                if not pn:
+                    raise DevtoolError("Found *.bbappend in %s, but could not determine EXTERNALSRC:pn-*. "
+                            "Maybe still using old syntax?" % config.workspace_path)
                 if not pnvalues.get('srctreebase', None):
                     pnvalues['srctreebase'] = pnvalues['srctree']
                 logger.debug('Found recipe %s' % pnvalues)
@@ -314,10 +318,10 @@
 
     args = parser.parse_args(unparsed_args, namespace=global_args)
 
-    if not getattr(args, 'no_workspace', False):
-        read_workspace()
-
     try:
+        if not getattr(args, 'no_workspace', False):
+            read_workspace()
+
         ret = args.func(args, config, basepath, workspace)
     except DevtoolError as err:
         if str(err):
diff --git a/poky/scripts/lib/devtool/upgrade.py b/poky/scripts/lib/devtool/upgrade.py
index 0357ec0..39a1910 100644
--- a/poky/scripts/lib/devtool/upgrade.py
+++ b/poky/scripts/lib/devtool/upgrade.py
@@ -119,20 +119,19 @@
             f.write('# original_files: %s\n' % ' '.join(copied))
     return af
 
-def _cleanup_on_error(rf, srctree):
-    rfp = os.path.split(rf)[0] # recipe folder
-    rfpp = os.path.split(rfp)[0] # recipes folder
-    if os.path.exists(rfp):
-        shutil.rmtree(rfp)
-    if not len(os.listdir(rfpp)):
-        os.rmdir(rfpp)
+def _cleanup_on_error(rd, srctree):
+    rdp = os.path.split(rd)[0] # recipes folder
+    if os.path.exists(rd):
+        shutil.rmtree(rd)
+    if not len(os.listdir(rdp)):
+        os.rmdir(rdp)
     srctree = os.path.abspath(srctree)
     if os.path.exists(srctree):
         shutil.rmtree(srctree)
 
-def _upgrade_error(e, rf, srctree, keep_failure=False, extramsg=None):
-    if rf and not keep_failure:
-        _cleanup_on_error(rf, srctree)
+def _upgrade_error(e, rd, srctree, keep_failure=False, extramsg=None):
+    if not keep_failure:
+        _cleanup_on_error(rd, srctree)
     logger.error(e)
     if extramsg:
         logger.error(extramsg)
@@ -337,7 +336,10 @@
         replacing = True
         new_src_uri = []
         for entry in src_uri:
-            scheme, network, path, user, passwd, params = bb.fetch2.decodeurl(entry)
+            try:
+                scheme, network, path, user, passwd, params = bb.fetch2.decodeurl(entry)
+            except bb.fetch2.MalformedUrl as e:
+                raise DevtoolError("Could not decode SRC_URI: {}".format(e))
             if replacing and scheme in ['git', 'gitsm']:
                 branch = params.get('branch', 'master')
                 if rd.expand(branch) != srcbranch:
@@ -426,7 +428,7 @@
     try:
         rd = tinfoil.parse_recipe_file(fullpath, False)
     except bb.tinfoil.TinfoilCommandFailed as e:
-        _upgrade_error(e, fullpath, srctree, keep_failure, 'Parsing of upgraded recipe failed')
+        _upgrade_error(e, os.path.dirname(fullpath), srctree, keep_failure, 'Parsing of upgraded recipe failed')
     oe.recipeutils.patch_recipe(rd, fullpath, newvalues)
 
     return fullpath, copied
@@ -568,10 +570,9 @@
             new_licenses = _extract_licenses(srctree_s, (rd.getVar('LIC_FILES_CHKSUM') or ""))
             license_diff = _generate_license_diff(old_licenses, new_licenses)
             rf, copied = _create_new_recipe(args.version, md5, sha256, args.srcrev, srcbranch, srcsubdir1, srcsubdir2, config.workspace_path, tinfoil, rd, license_diff, new_licenses, srctree, args.keep_failure)
-        except bb.process.CmdError as e:
-            _upgrade_error(e, rf, srctree, args.keep_failure)
-        except DevtoolError as e:
-            _upgrade_error(e, rf, srctree, args.keep_failure)
+        except (bb.process.CmdError, DevtoolError) as e:
+            recipedir = os.path.join(config.workspace_path, 'recipes', rd.getVar('BPN'))
+            _upgrade_error(e, recipedir, srctree, args.keep_failure)
         standard._add_md5(config, pn, os.path.dirname(rf))
 
         af = _write_append(rf, srctree_s, args.same_dir, args.no_same_dir, rev2,
diff --git a/poky/scripts/lib/wic/misc.py b/poky/scripts/lib/wic/misc.py
index 3bc165f..2b90821 100644
--- a/poky/scripts/lib/wic/misc.py
+++ b/poky/scripts/lib/wic/misc.py
@@ -141,11 +141,12 @@
         cmd_and_args = pseudo + cmd_and_args
 
     hosttools_dir = get_bitbake_var("HOSTTOOLS_DIR")
+    target_sys = get_bitbake_var("TARGET_SYS")
 
-    native_paths = "%s/sbin:%s/usr/sbin:%s/usr/bin:%s/bin:%s" % \
+    native_paths = "%s/sbin:%s/usr/sbin:%s/usr/bin:%s/usr/bin/%s:%s/bin:%s" % \
                    (native_sysroot, native_sysroot,
-                    native_sysroot, native_sysroot,
-                    hosttools_dir)
+                    native_sysroot, native_sysroot, target_sys,
+                    native_sysroot, hosttools_dir)
 
     native_cmd_and_args = "export PATH=%s:$PATH;%s" % \
                    (native_paths, cmd_and_args)
diff --git a/poky/scripts/lib/wic/plugins/source/bootimg-efi.py b/poky/scripts/lib/wic/plugins/source/bootimg-efi.py
index 0391aeb..634a808 100644
--- a/poky/scripts/lib/wic/plugins/source/bootimg-efi.py
+++ b/poky/scripts/lib/wic/plugins/source/bootimg-efi.py
@@ -35,6 +35,26 @@
     name = 'bootimg-efi'
 
     @classmethod
+    def _copy_additional_files(cls, hdddir, initrd, dtb):
+        bootimg_dir = get_bitbake_var("DEPLOY_DIR_IMAGE")
+        if not bootimg_dir:
+            raise WicError("Couldn't find DEPLOY_DIR_IMAGE, exiting")
+
+        if initrd:
+            initrds = initrd.split(';')
+            for rd in initrds:
+                cp_cmd = "cp %s/%s %s" % (bootimg_dir, rd, hdddir)
+                exec_cmd(cp_cmd, True)
+        else:
+            logger.debug("Ignoring missing initrd")
+
+        if dtb:
+            if ';' in dtb:
+                raise WicError("Only one DTB supported, exiting")
+            cp_cmd = "cp %s/%s %s" % (bootimg_dir, dtb, hdddir)
+            exec_cmd(cp_cmd, True)
+
+    @classmethod
     def do_configure_grubefi(cls, hdddir, creator, cr_workdir, source_params):
         """
         Create loader-specific (grub-efi) config
@@ -53,18 +73,9 @@
                                "get it from %s." % configfile)
 
         initrd = source_params.get('initrd')
+        dtb = source_params.get('dtb')
 
-        if initrd:
-            bootimg_dir = get_bitbake_var("DEPLOY_DIR_IMAGE")
-            if not bootimg_dir:
-                raise WicError("Couldn't find DEPLOY_DIR_IMAGE, exiting")
-
-            initrds = initrd.split(';')
-            for rd in initrds:
-                cp_cmd = "cp %s/%s %s" % (bootimg_dir, rd, hdddir)
-                exec_cmd(cp_cmd, True)
-        else:
-            logger.debug("Ignoring missing initrd")
+        cls._copy_additional_files(hdddir, initrd, dtb)
 
         if not custom_cfg:
             # Create grub configuration using parameters from wks file
@@ -98,6 +109,9 @@
                     grubefi_conf += " /%s" % rd
                 grubefi_conf += "\n"
 
+            if dtb:
+                grubefi_conf += "devicetree /%s\n" % dtb
+
             grubefi_conf += "}\n"
 
         logger.debug("Writing grubefi config %s/hdd/boot/EFI/BOOT/grub.cfg",
@@ -119,25 +133,18 @@
 
         bootloader = creator.ks.bootloader
 
+        unified_image = source_params.get('create-unified-kernel-image') == "true"
+
         loader_conf = ""
-        if source_params.get('create-unified-kernel-image') != "true":
+        if not unified_image:
             loader_conf += "default boot\n"
         loader_conf += "timeout %d\n" % bootloader.timeout
 
         initrd = source_params.get('initrd')
+        dtb = source_params.get('dtb')
 
-        if initrd and source_params.get('create-unified-kernel-image') != "true":
-            # obviously we need to have a common common deploy var
-            bootimg_dir = get_bitbake_var("DEPLOY_DIR_IMAGE")
-            if not bootimg_dir:
-                raise WicError("Couldn't find DEPLOY_DIR_IMAGE, exiting")
-
-            initrds = initrd.split(';')
-            for rd in initrds:
-                cp_cmd = "cp %s/%s %s" % (bootimg_dir, rd, hdddir)
-                exec_cmd(cp_cmd, True)
-        else:
-            logger.debug("Ignoring missing initrd")
+        if not unified_image:
+            cls._copy_additional_files(hdddir, initrd, dtb)
 
         logger.debug("Writing systemd-boot config "
                      "%s/hdd/boot/loader/loader.conf", cr_workdir)
@@ -185,7 +192,10 @@
                 for rd in initrds:
                     boot_conf += "initrd /%s\n" % rd
 
-        if source_params.get('create-unified-kernel-image') != "true":
+            if dtb:
+                boot_conf += "devicetree /%s\n" % dtb
+
+        if not unified_image:
             logger.debug("Writing systemd-boot config "
                          "%s/hdd/boot/loader/entries/boot.conf", cr_workdir)
             cfg = open("%s/hdd/boot/loader/entries/boot.conf" % cr_workdir, "w")
@@ -320,27 +330,36 @@
                         shutil.copyfileobj(in_file, initrd)
                 initrd.close()
 
+                dtb = source_params.get('dtb')
+                if dtb:
+                    if ';' in dtb:
+                        raise WicError("Only one DTB supported, exiting")
+                    dtb_params = '--add-section .dtb=%s/%s --change-section-vma .dtb=0x40000' % \
+                        (deploy_dir, dtb)
+                else:
+                    dtb_params = ''
+
                 # Searched by systemd-boot:
                 # https://systemd.io/BOOT_LOADER_SPECIFICATION/#type-2-efi-unified-kernel-images
                 install_cmd = "install -d %s/EFI/Linux" % hdddir
                 exec_cmd(install_cmd)
 
                 staging_dir_host = get_bitbake_var("STAGING_DIR_HOST")
+                target_sys = get_bitbake_var("TARGET_SYS")
 
                 # https://www.freedesktop.org/software/systemd/man/systemd-stub.html
-                objcopy_cmd = "objcopy \
-                    --add-section .osrel=%s --change-section-vma .osrel=0x20000 \
-                    --add-section .cmdline=%s --change-section-vma .cmdline=0x30000 \
-                    --add-section .linux=%s --change-section-vma .linux=0x2000000 \
-                    --add-section .initrd=%s --change-section-vma .initrd=0x3000000 \
-                    %s %s" % \
-                    ("%s/usr/lib/os-release" % staging_dir_host,
-                    cmdline.name,
-                    "%s/%s" % (staging_kernel_dir, kernel),
-                    initrd.name,
-                    efi_stub,
-                    "%s/EFI/Linux/linux.efi" % hdddir)
-                exec_cmd(objcopy_cmd)
+                objcopy_cmd = "%s-objcopy" % target_sys
+                objcopy_cmd += " --add-section .osrel=%s/usr/lib/os-release" % staging_dir_host
+                objcopy_cmd += " --change-section-vma .osrel=0x20000"
+                objcopy_cmd += " --add-section .cmdline=%s" % cmdline.name
+                objcopy_cmd += " --change-section-vma .cmdline=0x30000"
+                objcopy_cmd += dtb_params
+                objcopy_cmd += " --add-section .linux=%s/%s" % (staging_kernel_dir, kernel)
+                objcopy_cmd += " --change-section-vma .linux=0x2000000"
+                objcopy_cmd += " --add-section .initrd=%s" % initrd.name
+                objcopy_cmd += " --change-section-vma .initrd=0x3000000"
+                objcopy_cmd += " %s %s/EFI/Linux/linux.efi" % (efi_stub, hdddir)
+                exec_native_cmd(objcopy_cmd, native_sysroot)
         else:
             install_cmd = "install -m 0644 %s/%s %s/%s" % \
                 (staging_kernel_dir, kernel, hdddir, kernel)
diff --git a/poky/scripts/lib/wic/plugins/source/rootfs.py b/poky/scripts/lib/wic/plugins/source/rootfs.py
index 25bb41d..fc06312 100644
--- a/poky/scripts/lib/wic/plugins/source/rootfs.py
+++ b/poky/scripts/lib/wic/plugins/source/rootfs.py
@@ -35,7 +35,7 @@
     @staticmethod
     def __validate_path(cmd, rootfs_dir, path):
         if os.path.isabs(path):
-            logger.error("%s: Must be relative: %s" % (cmd, orig_path))
+            logger.error("%s: Must be relative: %s" % (cmd, path))
             sys.exit(1)
 
         # Disallow climbing outside of parent directory using '..',
diff --git a/poky/scripts/oe-setup-builddir b/poky/scripts/oe-setup-builddir
index 54048e6..5d64416 100755
--- a/poky/scripts/oe-setup-builddir
+++ b/poky/scripts/oe-setup-builddir
@@ -74,9 +74,10 @@
 if [ ! -r "$BUILDDIR/conf/local.conf" ]; then
     cat <<EOM
 You had no conf/local.conf file. This configuration file has therefore been
-created for you with some default values. You may wish to edit it to, for
-example, select a different MACHINE (target hardware). See conf/local.conf
-for more information as common configuration options are commented.
+created for you from $OECORELOCALCONF
+You may wish to edit it to, for example, select a different MACHINE (target
+hardware). See conf/local.conf for more information as common configuration
+options are commented.
 
 EOM
     cp -f "$OECORELOCALCONF" "$BUILDDIR/conf/local.conf"
@@ -89,8 +90,9 @@
 if [ ! -r "$BUILDDIR/conf/bblayers.conf" ]; then
     cat <<EOM
 You had no conf/bblayers.conf file. This configuration file has therefore been
-created for you with some default values. To add additional metadata layers
-into your configuration please add entries to conf/bblayers.conf.
+created for you from $OECORELAYERCONF
+To add additional metadata layers into your configuration please add entries
+to conf/bblayers.conf.
 
 EOM
 
diff --git a/poky/scripts/pybootchartgui/pybootchartgui/draw.py b/poky/scripts/pybootchartgui/pybootchartgui/draw.py
index a13df3a..4326361 100644
--- a/poky/scripts/pybootchartgui/pybootchartgui/draw.py
+++ b/poky/scripts/pybootchartgui/pybootchartgui/draw.py
@@ -88,6 +88,10 @@
 IO_PRESSURE_AVG10_COLOR = (0.0, 0.0, 0.0, 1.0)
 # delta total IO pressure color
 IO_PRESSURE_TOTAL_COLOR = IO_COLOR
+# avg10 memory pressure color
+MEM_PRESSURE_AVG10_COLOR = (0.0, 0.0, 0.0, 1.0)
+# delta total memory pressure color
+MEM_PRESSURE_TOTAL_COLOR = DISK_TPUT_COLOR
 
 
 
@@ -429,8 +433,10 @@
 
     # render CPU pressure chart
     if trace.cpu_pressure:
-        draw_legend_line(ctx, "avg10 CPU Pressure", CPU_PRESSURE_AVG10_COLOR, off_x, curr_y+20, leg_s)
-        draw_legend_box(ctx, "delta total CPU Pressure", CPU_PRESSURE_TOTAL_COLOR, off_x + 140, curr_y+20, leg_s)
+        max_sample_avg = max (trace.cpu_pressure, key = lambda s: s.avg10)
+        max_sample_total = max (trace.cpu_pressure, key = lambda s: s.deltaTotal)
+        draw_legend_line(ctx, "avg10 CPU Pressure (max %d%%)"  % (max_sample_avg.avg10), CPU_PRESSURE_AVG10_COLOR, off_x, curr_y+20, leg_s)
+        draw_legend_box(ctx, "delta total CPU Pressure (max %d)" % (max_sample_total.deltaTotal), CPU_PRESSURE_TOTAL_COLOR, off_x + 240, curr_y+20, leg_s)
 
         # render delta total cpu
         chart_rect = (off_x, curr_y+30, w, bar_h)
@@ -442,30 +448,31 @@
                     proc_tree, None)
 
         # render avg10 cpu
-        max_sample = max (trace.cpu_pressure, key = lambda s: s.avg10)
         if clip_visible (clip, chart_rect):
             draw_chart (ctx, CPU_PRESSURE_AVG10_COLOR, False, chart_rect, \
                     [(sample.time, sample.avg10) for sample in trace.cpu_pressure], \
                     proc_tree, None)
 
-        pos_x = off_x + ((max_sample.time - proc_tree.start_time) * w / proc_tree.duration)
+        pos_x = off_x + ((max_sample_avg.time - proc_tree.start_time) * w / proc_tree.duration)
 
         shift_x, shift_y = -20, 20
         if (pos_x < off_x + 245):
             shift_x, shift_y = 5, 40
 
 
-        label = "%d%%" % (max_sample.avg10)
+        label = "%d%%" % (max_sample_avg.avg10)
         draw_text (ctx, label, CPU_PRESSURE_AVG10_COLOR, pos_x + shift_x, curr_y + shift_y)
 
         curr_y = curr_y + 30 + bar_h
 
-    # render delta total io
+    # render I/O pressure chart
     if trace.io_pressure:
-        draw_legend_line(ctx, "avg10 I/O Pressure", IO_PRESSURE_AVG10_COLOR, off_x, curr_y+20, leg_s)
-        draw_legend_box(ctx, "delta total I/O Pressure", IO_PRESSURE_TOTAL_COLOR, off_x + 140, curr_y+20, leg_s)
+        max_sample_avg = max (trace.io_pressure, key = lambda s: s.avg10)
+        max_sample_total = max (trace.io_pressure, key = lambda s: s.deltaTotal)
+        draw_legend_line(ctx, "avg10 I/O Pressure (max %d%%)"  % (max_sample_avg.avg10), IO_PRESSURE_AVG10_COLOR, off_x, curr_y+20, leg_s)
+        draw_legend_box(ctx, "delta total I/O Pressure (max %d)" % (max_sample_total.deltaTotal), IO_PRESSURE_TOTAL_COLOR, off_x + 240, curr_y+20, leg_s)
 
-        # render avg10 io
+        # render delta total io
         chart_rect = (off_x, curr_y+30, w, bar_h)
         if clip_visible (clip, chart_rect):
             draw_box_ticks (ctx, chart_rect, sec_w)
@@ -474,24 +481,58 @@
                     [(sample.time, sample.deltaTotal) for sample in trace.io_pressure], \
                     proc_tree, None)
 
-        # render io pressure
-        max_sample = max (trace.io_pressure, key = lambda s: s.avg10)
+        # render avg10 io
         if clip_visible (clip, chart_rect):
             draw_chart (ctx, IO_PRESSURE_AVG10_COLOR, False, chart_rect, \
                     [(sample.time, sample.avg10) for sample in trace.io_pressure], \
                     proc_tree, None)
 
-        pos_x = off_x + ((max_sample.time - proc_tree.start_time) * w / proc_tree.duration)
+        pos_x = off_x + ((max_sample_avg.time - proc_tree.start_time) * w / proc_tree.duration)
 
         shift_x, shift_y = -20, 20
         if (pos_x < off_x + 245):
             shift_x, shift_y = 5, 40
 
-        label = "%d%%" % (max_sample.avg10)
+
+        label = "%d%%" % (max_sample_avg.avg10)
         draw_text (ctx, label, IO_PRESSURE_AVG10_COLOR, pos_x + shift_x, curr_y + shift_y)
 
         curr_y = curr_y + 30 + bar_h
 
+    # render MEM pressure chart
+    if trace.mem_pressure:
+        max_sample_avg = max (trace.mem_pressure, key = lambda s: s.avg10)
+        max_sample_total = max (trace.mem_pressure, key = lambda s: s.deltaTotal)
+        draw_legend_line(ctx, "avg10 MEM Pressure (max %d%%)"  % (max_sample_avg.avg10), MEM_PRESSURE_AVG10_COLOR, off_x, curr_y+20, leg_s)
+        draw_legend_box(ctx, "delta total MEM Pressure (max %d)" % (max_sample_total.deltaTotal), MEM_PRESSURE_TOTAL_COLOR, off_x + 240, curr_y+20, leg_s)
+
+        # render delta total mem
+        chart_rect = (off_x, curr_y+30, w, bar_h)
+        if clip_visible (clip, chart_rect):
+            draw_box_ticks (ctx, chart_rect, sec_w)
+            draw_annotations (ctx, proc_tree, trace.times, chart_rect)
+            draw_chart (ctx, MEM_PRESSURE_TOTAL_COLOR, True, chart_rect, \
+                    [(sample.time, sample.deltaTotal) for sample in trace.mem_pressure], \
+                    proc_tree, None)
+
+        # render avg10 mem
+        if clip_visible (clip, chart_rect):
+            draw_chart (ctx, MEM_PRESSURE_AVG10_COLOR, False, chart_rect, \
+                    [(sample.time, sample.avg10) for sample in trace.mem_pressure], \
+                    proc_tree, None)
+
+        pos_x = off_x + ((max_sample_avg.time - proc_tree.start_time) * w / proc_tree.duration)
+
+        shift_x, shift_y = -20, 20
+        if (pos_x < off_x + 245):
+            shift_x, shift_y = 5, 40
+
+
+        label = "%d%%" % (max_sample_avg.avg10)
+        draw_text (ctx, label, MEM_PRESSURE_AVG10_COLOR, pos_x + shift_x, curr_y + shift_y)
+
+        curr_y = curr_y + 30 + bar_h
+
     # render disk space usage
     #
     # Draws the amount of disk space used on each volume relative to the
@@ -775,7 +816,7 @@
         cmdString = proc.cmd
     else:
         cmdString = ''
-    if (OPTIONS.show_pid or OPTIONS.show_all) and ipid is not 0:
+    if (OPTIONS.show_pid or OPTIONS.show_all) and ipid != 0:
         cmdString = cmdString + " [" + str(ipid // 1000) + "]"
     if OPTIONS.show_all:
         if proc.args:
@@ -873,7 +914,7 @@
         if self.color is None:
             i = self.next() % HSV_MAX_MOD
             h = 0.0
-            if i is not 0:
+            if i != 0:
                 h = (1.0 * i) / HSV_MAX_MOD
             s = 0.5
             v = 1.0
diff --git a/poky/scripts/pybootchartgui/pybootchartgui/parsing.py b/poky/scripts/pybootchartgui/pybootchartgui/parsing.py
index 004d6fb..362d515 100644
--- a/poky/scripts/pybootchartgui/pybootchartgui/parsing.py
+++ b/poky/scripts/pybootchartgui/pybootchartgui/parsing.py
@@ -51,6 +51,7 @@
         self.monitor_disk = None
         self.cpu_pressure = []
         self.io_pressure = []
+        self.mem_pressure = []
         self.times = [] # Always empty, but expected by draw.py when drawing system charts.
 
         if len(paths):
@@ -564,6 +565,8 @@
     pressure_stats = []
     if filename == "cpu.log":
         SamplingClass = CPUPressureSample
+    elif filename == "memory.log":
+        SamplingClass = MemPressureSample
     else:
         SamplingClass = IOPressureSample
     for time, lines in _parse_timed_blocks(file):
@@ -769,6 +772,8 @@
         state.cpu_pressure = _parse_pressure_logs(file, name)
     elif name == "io.log":
         state.io_pressure = _parse_pressure_logs(file, name)
+    elif name == "memory.log":
+        state.mem_pressure = _parse_pressure_logs(file, name)
     elif not filename.endswith('.log'):
         _parse_bitbake_buildstats(writer, state, filename, file)
     t2 = time.process_time()
diff --git a/poky/scripts/pybootchartgui/pybootchartgui/samples.py b/poky/scripts/pybootchartgui/pybootchartgui/samples.py
index 472dc27..a70d8a5 100644
--- a/poky/scripts/pybootchartgui/pybootchartgui/samples.py
+++ b/poky/scripts/pybootchartgui/pybootchartgui/samples.py
@@ -53,6 +53,14 @@
         self.avg300 = avg300
         self.deltaTotal = deltaTotal
 
+class MemPressureSample:
+    def __init__(self, time, avg10, avg60, avg300, deltaTotal):
+        self.time = time
+        self.avg10 = avg10
+        self.avg60 = avg60
+        self.avg300 = avg300
+        self.deltaTotal = deltaTotal
+
 
 class MemSample:
     used_values = ('MemTotal', 'MemFree', 'Buffers', 'Cached', 'SwapTotal', 'SwapFree',)
diff --git a/poky/scripts/runqemu b/poky/scripts/runqemu
index b4c1ae6..b6fc212 100755
--- a/poky/scripts/runqemu
+++ b/poky/scripts/runqemu
@@ -1375,7 +1375,7 @@
             elif "-display sdl" in output:
                 self.sdl = True
             else:
-                self.qemu_opt += '-display none'
+                self.qemu_opt += ' -display none'
 
         if self.sdl == True or self.gtk == True or self.egl_headless == True: