diff --git a/poky/scripts/lib/devtool/deploy.py b/poky/scripts/lib/devtool/deploy.py
index e5af2c9..8333225 100644
--- a/poky/scripts/lib/devtool/deploy.py
+++ b/poky/scripts/lib/devtool/deploy.py
@@ -168,7 +168,7 @@
         if args.strip and not args.dry_run:
             # Fakeroot copy to new destination
             srcdir = recipe_outdir
-            recipe_outdir = os.path.join(rd.getVar('WORKDIR'), 'deploy-target-stripped')
+            recipe_outdir = os.path.join(rd.getVar('WORKDIR'), 'devtool-deploy-target-stripped')
             if os.path.isdir(recipe_outdir):
                 bb.utils.remove(recipe_outdir, True)
             exec_fakeroot(rd, "cp -af %s %s" % (os.path.join(srcdir, '.'), recipe_outdir), shell=True)
diff --git a/poky/scripts/lib/devtool/upgrade.py b/poky/scripts/lib/devtool/upgrade.py
index 24e3700..da1456a 100644
--- a/poky/scripts/lib/devtool/upgrade.py
+++ b/poky/scripts/lib/devtool/upgrade.py
@@ -261,21 +261,20 @@
             logger.warning('By user choice, the following patches will NOT be applied to the new source tree:\n  %s' % '\n  '.join([os.path.basename(patch) for patch in patches]))
     else:
         __run('git checkout devtool-patched -b %s' % branch)
-        skiptag = False
-        try:
-            __run('git rebase %s' % rev)
-        except bb.process.ExecutionError as e:
-            skiptag = True
-            if 'conflict' in e.stdout:
-                logger.warning('Command \'%s\' failed:\n%s\n\nYou will need to resolve conflicts in order to complete the upgrade.' % (e.command, e.stdout.rstrip()))
-            else:
-                logger.warning('Command \'%s\' failed:\n%s' % (e.command, e.stdout))
-        if not skiptag:
-            if uri.startswith('git://') or uri.startswith('gitsm://'):
-                suffix = 'new'
-            else:
-                suffix = newpv
-            __run('git tag -f devtool-patched-%s' % suffix)
+        (stdout, _) = __run('git branch --list devtool-override-*')
+        branches_to_rebase = [branch] + stdout.split()
+        for b in branches_to_rebase:
+            logger.info("Rebasing {} onto {}".format(b, rev))
+            __run('git checkout %s' % b)
+            try:
+                __run('git rebase %s' % rev)
+            except bb.process.ExecutionError as e:
+                if 'conflict' in e.stdout:
+                    logger.warning('Command \'%s\' failed:\n%s\n\nYou will need to resolve conflicts in order to complete the upgrade.' % (e.command, e.stdout.rstrip()))
+                    __run('git rebase --abort')
+                else:
+                    logger.warning('Command \'%s\' failed:\n%s' % (e.command, e.stdout))
+        __run('git checkout %s' % branch)
 
     if tmpsrctree:
         if keep_temp:
@@ -522,6 +521,15 @@
         else:
             srctree = standard.get_default_srctree(config, pn)
 
+        # Check that recipe isn't using a shared workdir
+        s = os.path.abspath(rd.getVar('S'))
+        workdir = os.path.abspath(rd.getVar('WORKDIR'))
+        srctree_s = srctree
+        if s.startswith(workdir) and s != workdir and os.path.dirname(s) != workdir:
+            # Handle if S is set to a subdirectory of the source
+            srcsubdir = os.path.relpath(s, workdir).split(os.sep, 1)[1]
+            srctree_s = os.path.join(srctree, srcsubdir)
+
         # try to automatically discover latest version and revision if not provided on command line
         if not args.version and not args.srcrev:
             version_info = oe.recipeutils.get_recipe_upstream_version(rd)
@@ -551,12 +559,12 @@
         try:
             logger.info('Extracting current version source...')
             rev1, srcsubdir1 = standard._extract_source(srctree, False, 'devtool-orig', False, config, basepath, workspace, args.fixed_setup, rd, tinfoil, no_overrides=args.no_overrides)
-            old_licenses = _extract_licenses(srctree, (rd.getVar('LIC_FILES_CHKSUM') or ""))
+            old_licenses = _extract_licenses(srctree_s, (rd.getVar('LIC_FILES_CHKSUM') or ""))
             logger.info('Extracting upgraded version source...')
             rev2, md5, sha256, srcbranch, srcsubdir2 = _extract_new_source(args.version, srctree, args.no_patch,
                                                     args.srcrev, args.srcbranch, args.branch, args.keep_temp,
                                                     tinfoil, rd)
-            new_licenses = _extract_licenses(srctree, (rd.getVar('LIC_FILES_CHKSUM') or ""))
+            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:
@@ -565,7 +573,7 @@
             _upgrade_error(e, rf, srctree, args.keep_failure)
         standard._add_md5(config, pn, os.path.dirname(rf))
 
-        af = _write_append(rf, srctree, args.same_dir, args.no_same_dir, rev2,
+        af = _write_append(rf, srctree_s, args.same_dir, args.no_same_dir, rev2,
                         copied, config.workspace_path, rd)
         standard._add_md5(config, pn, af)
 
diff --git a/poky/scripts/lib/wic/plugins/source/bootimg-pcbios.py b/poky/scripts/lib/wic/plugins/source/bootimg-pcbios.py
index f2639e7..32e47f1 100644
--- a/poky/scripts/lib/wic/plugins/source/bootimg-pcbios.py
+++ b/poky/scripts/lib/wic/plugins/source/bootimg-pcbios.py
@@ -186,8 +186,10 @@
         # dosfs image, created by mkdosfs
         bootimg = "%s/boot%s.img" % (cr_workdir, part.lineno)
 
-        dosfs_cmd = "mkdosfs -n boot -i %s -S 512 -C %s %d" % \
-                    (part.fsuuid, bootimg, blocks)
+        label = part.label if part.label else "boot"
+
+        dosfs_cmd = "mkdosfs -n %s -i %s -S 512 -C %s %d" % \
+                    (label, part.fsuuid, bootimg, blocks)
         exec_native_cmd(dosfs_cmd, native_sysroot)
 
         mcopy_cmd = "mcopy -i %s -s %s/* ::/" % (bootimg, hdddir)
diff --git a/poky/scripts/oe-time-dd-test.sh b/poky/scripts/oe-time-dd-test.sh
index ccdd55e..386de83 100755
--- a/poky/scripts/oe-time-dd-test.sh
+++ b/poky/scripts/oe-time-dd-test.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # oe-time-dd-test records how much time it takes to 
 # write <count> number of kilobytes to the filesystem.
@@ -8,23 +8,24 @@
 # The purporse of this script is to find which part of
 # the build system puts stress on the filesystem io and
 # log all the processes.
-
 usage() {
-        echo "Usage: $0 <count>"
+	echo "$0 is used to detect i/o latency and runs commands to display host information."
+	echo "The following commands are run in order:"
+	echo "1) top -c -b -n1 -w 512"
+	echo "2) iostat -y -z -x 5 1"
+	echo "3) tail -30 tmp*/log/cooker/*/console-latest.log to gather cooker log."
+	echo " "
+	echo "Options:"
+	echo "-c | --count <amount>		dd (transfer) <amount> KiB of data within specified timeout to detect latency."
+	echo "				Must enable -t option."
+	echo "-t | --timeout <time>		timeout in seconds for the <count> amount of data to be transferred."
+	echo "-l | --log-only			run the commands without performing the data transfer."
+	echo "-h | --help			show help"
+
 }
 
-TIMEOUT=15
-
-if [ $# -ne 1 ]; then
-        usage
-        exit 1
-fi
-
-uptime
-timeout ${TIMEOUT} dd if=/dev/zero of=oe-time-dd-test.dat bs=1024 count=$1 conv=fsync
-if [ $? -ne 0 ]; then
-	echo "Timeout used: ${TIMEOUT}"
-	echo "start: top output"
+run_cmds() {
+    echo "start: top output"
 	top -c -b -n1 -w 512
 	echo "end: top output"
 	echo "start: iostat"
@@ -33,4 +34,69 @@
 	echo "start: cooker log"
 	tail -30 tmp*/log/cooker/*/console-latest.log
 	echo "end: cooker log"
+}
+
+if [ $# -lt 1 ]; then
+	usage
+	exit 1
+fi
+
+re_c='^[0-9]+$'
+#re_t='^[0-9]+([.][0-9]+)?$'
+
+while [[ $# -gt 0 ]]; do
+	key="$1"
+
+	case $key in
+		-c|--count)
+			COUNT=$2
+			shift
+			shift
+			if ! [[ $COUNT =~ $re_c ]] || [[ $COUNT -le 0 ]] ; then
+				usage
+				exit 1
+			fi
+			;;
+		-t|--timeout)
+			TIMEOUT=$2
+			shift
+			shift
+			if ! [[ $TIMEOUT =~ $re_c ]] || [[ $TIMEOUT -le 0 ]] ; then
+				usage
+				exit 1
+			fi
+			;;
+		-l|--log-only)
+			LOG_ONLY="true"
+			shift
+			shift
+			;;
+		-h|--help)
+			usage
+			exit 0
+			;;
+		*)
+			usage
+			exit 1
+			;;
+	esac
+done
+
+
+if [ "$LOG_ONLY" = "true" ] ; then
+    uptime
+    run_cmds
+    exit
+fi
+
+if [ -z ${TIMEOUT+x} ] || [ -z ${COUNT+x} ] ; then
+    usage
+    exit 1
+fi
+
+uptime
+echo "Timeout used: ${TIMEOUT}"
+timeout ${TIMEOUT} dd if=/dev/zero of=oe-time-dd-test.dat bs=1024 count=${COUNT} conv=fsync
+if [ $? -ne 0 ]; then
+    run_cmds
 fi
diff --git a/poky/scripts/runqemu b/poky/scripts/runqemu
index 1f332ef..2914f15 100755
--- a/poky/scripts/runqemu
+++ b/poky/scripts/runqemu
@@ -233,9 +233,12 @@
     def release_taplock(self):
         if self.taplock_descriptor:
             logger.debug("Releasing lockfile for tap device '%s'" % self.tap)
-            fcntl.flock(self.taplock_descriptor, fcntl.LOCK_UN)
+            # We pass the fd to the qemu process and if we unlock here, it would unlock for
+            # that too. Therefore don't unlock, just close
+            # fcntl.flock(self.taplock_descriptor, fcntl.LOCK_UN)
             self.taplock_descriptor.close()
-            os.remove(self.taplock)
+            # Removing the file is a potential race, don't do that either
+            # os.remove(self.taplock)
             self.taplock_descriptor = None
 
     def check_free_port(self, host, port, lockdir):
@@ -273,17 +276,23 @@
 
     def release_portlock(self, lockfile=None):
         if lockfile != None:
-           logger.debug("Releasing lockfile '%s'" % lockfile)
-           fcntl.flock(self.portlocks[lockfile], fcntl.LOCK_UN)
-           self.portlocks[lockfile].close()
-           os.remove(lockfile)
-           del self.portlocks[lockfile]
+            logger.debug("Releasing lockfile '%s'" % lockfile)
+            # We pass the fd to the qemu process and if we unlock here, it would unlock for
+            # that too. Therefore don't unlock, just close
+            # fcntl.flock(self.portlocks[lockfile], fcntl.LOCK_UN)
+            self.portlocks[lockfile].close()
+            # Removing the file is a potential race, don't do that either
+            # os.remove(lockfile)
+            del self.portlocks[lockfile]
         elif len(self.portlocks):
             for lockfile, descriptor in self.portlocks.items():
                 logger.debug("Releasing lockfile '%s'" % lockfile)
-                fcntl.flock(descriptor, fcntl.LOCK_UN)
+                # We pass the fd to the qemu process and if we unlock here, it would unlock for
+                # that too. Therefore don't unlock, just close
+                # fcntl.flock(descriptor, fcntl.LOCK_UN)
                 descriptor.close()
-                os.remove(lockfile)
+                # Removing the file is a potential race, don't do that either
+                # os.remove(lockfile)
             self.portlocks = {}
 
     def get(self, key):