diff --git a/debian/bin/genpatch-pfkernel b/debian/bin/genpatch-pfkernel
index 1356fdb..d7490ce 100755
--- a/debian/bin/genpatch-pfkernel
+++ b/debian/bin/genpatch-pfkernel
@@ -7,7 +7,7 @@ w=$(git rev-parse --path-format=absolute --show-toplevel) ; : "${w:?}" ; cd "$w"
 
 dst='debian/patches/pf'
 src='../linux-extras'
-branches='amd-pstate amd-rapl cpuidle crypto fixes ksm zstd'
+branches='amd-pstate amd-rapl cpu cpuidle crypto fixes ksm zstd'
 
 [ -d "${dst}" ]
 
diff --git a/debian/bin/new-release b/debian/bin/new-release
index ccce4aa..621c836 100755
--- a/debian/bin/new-release
+++ b/debian/bin/new-release
@@ -29,7 +29,7 @@ ver_path="v${major}.${minor}"
 
 tarball_new="linux_${v}.orig.tar"
 tarball_new_comp="${tarball_new}.xz"
-do_compress() { do_idle xz -1vv "$1" ; }
+do_compress() { do_idle xz -8vv "$1" ; }
 
 while ! [ -s "../${tarball_new_comp}" ] ; do
 
diff --git a/debian/bin/refine-configs b/debian/bin/refine-configs
new file mode 100755
index 0000000..fc09650
--- /dev/null
+++ b/debian/bin/refine-configs
@@ -0,0 +1,86 @@
+#!/bin/sh
+set -ef
+
+prj_dir=$(readlink -f "$(dirname "$0")/../..")
+cd "${prj_dir}"
+
+[ -s debian/changelog ]
+dpkg-parsechangelog --show-field Source | grep -Eq '^linux'
+
+ch_ver=$(dpkg-parsechangelog --show-field Version)
+
+v=$1
+[ -n "$v" ] || v=$(echo "${ch_ver}" | sed -E 's/^\d+://;s/-[^-]+$//')
+[ -n "$v" ]
+
+## should be source tree with patches applied
+src_dir=$2
+[ -n "${src_dir}" ] || src_dir="/tmp/linux-$v"
+[ -n "${src_dir}" ]
+[ -d "${src_dir}" ]
+src_dir=$(readlink -f "${src_dir}")
+
+export PYTHONUNBUFFERED=1 PYTHONDONTWRITEBYTECODE=1
+
+nproc=$(nproc || printf 2)
+case "${nproc}" in
+[0-1] ) nproc=2 ;;
+[2-9] | 1[0-9] ) ;;
+* ) nproc=20 ;;
+esac
+
+rm -rf debian/build/
+make -f debian/rules debian/control
+[ -f debian/rules.gen ]
+
+configs=$(sed -En '\,debian/build/(config\.[^ :]+):$,{s,,\1,p}' debian/rules.gen | sort -uV | tr -s '[:space:]' ' ')
+[ -n "${configs}" ]
+## produce configs
+make -f debian/rules.gen "-j${nproc}" $(printf ' debian/build/%s' ${configs})
+
+## refresh configs
+for c in ${configs} ; do
+	echo "# refreshing $c" >&2
+
+	f="debian/build/$c"
+	cp -f "$f" "${src_dir}/.config"
+	env -C "${src_dir}" make "-j${nproc}" olddefconfig
+	cp -f "${src_dir}/.config" "$f"
+done
+
+## remove BUILD_SALT
+find debian/build/ -name 'config.*' -type f -exec sed -i -E '/CONFIG_BUILD_SALT/d' {} +
+
+## prepare configs for splitting
+find debian/build/ -name 'config.*' -type f -exec sed -i -En '/CONFIG_/p' {} +
+
+(
+	cd debian/build
+	mkdir -p split-configs
+	cd split-configs
+	"${prj_dir}/../kconfigeditor2/split-common.py" $(printf ' ../%s' ${configs})
+	find ./ -mindepth 1 -maxdepth 1 -type f -exec sed -i -En '/CONFIG_/p' {} +
+
+	cp -f output-common "${prj_dir}/debian/config/config"
+	i=0
+	for c in ${configs} ; do
+		i=$((i+1))
+
+		## config.amd64_none_cloud -> amd64/config.cloud
+		## config.amd64_rt_desktop -> amd64/rt/config.desktop
+		read -r arch featureset flavour <<-EOF
+		$(printf '%s' "${c#config.}" | tr '_' ' ')
+		EOF
+		[ -n "${arch}" ]       || continue
+		[ -n "${featureset}" ] || continue
+		[ -n "${flavour}" ]    || continue
+		case "${featureset}" in
+		none ) o="${arch}/config.${flavour}" ;;
+		* )    o="${arch}/${featureset}/config.${flavour}" ;;
+		esac
+
+		cp -f "output-part-$i" "${prj_dir}/debian/config/$o"
+	done
+)
+
+"${prj_dir}/../kconfigeditor2/process.py" -s "${src_dir}" .