mirror of
https://gitlab.archlinux.org/tpowa/archboot.git
synced 2024-09-20 03:50:37 +02:00
huge RAM improvement on latest image
This commit is contained in:
Tobias Powalowski
parent
1e588a4c2b
commit
f2a70dd30b
1 changed files with 47 additions and 18 deletions
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@ -24,6 +24,32 @@ kver() {
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[[ "${_HWKVER}" == "" ]] && _HWKVER="$(uname -r)"
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}
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zram_mount() {
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modprobe zram
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echo zstd >/sys/block/zram0/comp_algorithm
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echo 3G >/sys/block/zram0/disksize
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echo 4 >/sys/block/zram0/max_comp_streams
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mkfs.btrfs --mixed /dev/zram0 > /dev/tty7 2>&1 || exit 1
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mkdir "${_W_DIR}"
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# use -o discard for RAM cleaning on delete
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# (online fstrimming the block device!)
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# fstrim <mountpoint> for manual action
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# it needs some seconds to get RAM free on delete!
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mount -o discard /dev/zram0 "${_W_DIR}"
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}
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clean_archboot() {
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# remove everything not necessary
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rm -rf "/usr/lib/firmware"
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rm -rf "/usr/lib/modules"
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rm -rf /usr/lib/{libicu*,libstdc++*}
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_SHARE_DIRS="archboot efitools file grub hwdata kbd licenses lshw makepkg nmap nano openvpn pacman refind systemd tc usb_modeswitch vim zoneinfo"
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for i in ${_SHARE_DIRS}; do
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#shellcheck disable=SC2115
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rm -rf "/usr/share/${i}"
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done
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}
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usage () {
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echo "Update installer, launch latest environment or create latest image files:"
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echo "-------------------------------------------------------------------------"
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@ -32,11 +58,11 @@ usage () {
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echo ""
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echo "On fast internet connection (100Mbit) (approx. 5 minutes):"
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echo " -latest Launch latest archboot environment (using kexec)."
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echo " This operation needs at least 2.3 GB RAM."
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echo " This operation needs at least 1.8 GB RAM."
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echo ""
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echo " -latest-install Launch latest archboot environment with downloaded"
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echo " package cache (using kexec)."
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echo " This operation needs at least 2.7 GB RAM."
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echo " This operation needs at least 2.5 GB RAM."
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echo ""
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echo " -latest-image Generate latest image files in /archboot-release directory"
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echo " This operation needs at least 4.6 GB RAM."
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@ -106,16 +132,9 @@ if [[ "${_L_COMPLETE}" == "1" || "${_L_INSTALL_COMPLETE}" == "1" ]]; then
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exit 1
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fi
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touch /.update-installer
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# remove everything not necessary
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zram_mount
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echo "Step 1/9: Removing not necessary files from / ..."
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[[ -d "/usr/lib/firmware" ]] && rm -r "/usr/lib/firmware"
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[[ -d "/usr/lib/modules" ]] && rm -r "/usr/lib/modules"
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rm -f /usr/lib/{libicu*,libstdc++*}
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_SHARE_DIRS="archboot efitools file grub hwdata kbd licenses lshw makepkg nmap nano openvpn pacman refind systemd tc usb_modeswitch vim zoneinfo"
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for i in ${_SHARE_DIRS}; do
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#shellcheck disable=SC2115
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[[ -d "/usr/share/${i}" ]] && rm -r "/usr/share/${i}"
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done
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clean_archboot
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echo "Step 2/9: Waiting for gpg pacman keyring import to finish ..."
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while pgrep -x gpg > /dev/null 2>&1; do
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sleep 1
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@ -144,7 +163,7 @@ if [[ "${_L_COMPLETE}" == "1" || "${_L_INSTALL_COMPLETE}" == "1" ]]; then
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fi
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echo "Step 4/9: Moving kernel ${VMLINUZ} to ${_W_DIR} ..."
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kver
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mv "${_W_DIR}"/boot/${VMLINUZ} "${_W_DIR}"/ || exit 1
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mv "${_W_DIR}"/boot/${VMLINUZ} / || exit 1
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echo "Step 5/9: Collect initramfs files in ${_W_DIR} ..."
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echo " This will need some time ..."
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# add fix for mkinitcpio 31, remove when 32 is released
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@ -155,6 +174,8 @@ if [[ "${_L_COMPLETE}" == "1" || "${_L_INSTALL_COMPLETE}" == "1" ]]; then
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#mv "${_W_DIR}/tmp" /initrd || exit 1
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echo "Step 6/9: Cleanup ${_W_DIR} ..."
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find "${_W_DIR}"/. -mindepth 1 -maxdepth 1 ! -name 'tmp' ! -name "${VMLINUZ}" -exec rm -rf {} \;
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# 10 seconds for getting free RAM
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sleep 10
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echo "Step 7/9: Create initramfs initrd.img ..."
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echo " This will need some time ..."
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# move cache back to initramfs directory in online mode
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@ -166,7 +187,7 @@ if [[ "${_L_COMPLETE}" == "1" || "${_L_INSTALL_COMPLETE}" == "1" ]]; then
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cd "${_W_DIR}"/tmp || exit 1
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find . -mindepth 1 -printf '%P\0' | sort -z |
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bsdtar --uid 0 --gid 0 --null -cnf - -T - |
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bsdtar --null -cf - --format=newc @- | zstd -T0 -10> "${_W_DIR}"/initrd.img
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bsdtar --null -cf - --format=newc @- | zstd -T0 -10> /initrd.img
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for i in $(find . -mindepth 1 -type f | sort); do
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rm "${i}" >/dev/null 2>&1
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done
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@ -174,23 +195,31 @@ if [[ "${_L_COMPLETE}" == "1" || "${_L_INSTALL_COMPLETE}" == "1" ]]; then
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sleep 1
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done
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echo "Step 8/9: Cleanup ${_W_DIR}/tmp ..."
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rm -r "${_W_DIR}"/tmp
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cd /
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umount ${_W_DIR}
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echo 1 > /sys/block/zram0/reset
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sleep 5
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echo "Step 9/9: Loading files through kexec into kernel now ..."
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# load kernel and initrds into running kernel in background mode!
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kexec -f "${_W_DIR}"/${VMLINUZ} --initrd="${_W_DIR}"/initrd.img --reuse-cmdline&
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sleep 1
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kexec -f /"${VMLINUZ}" --initrd="/initrd.img" --reuse-cmdline&
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# wait 1 seconds for getting a complete initramfs
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# remove kernel and initrd to save RAM for kexec in background
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rm "${_W_DIR}"/{initrd.img,${VMLINUZ}}
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sleep 2
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rm /{initrd.img,${VMLINUZ}}
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while pgreg -x kexec >/dev/null 2>&1; do
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sleep 1
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done
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echo "Finished: Rebooting in a few seconds ..."
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# don't show active prompt wait for kexec to be launched
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sleep 30
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fi
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# Generate new images
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if [[ "${_G_RELEASE}" == "1" ]]; then
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echo "Step 1/1: Generating new iso files now in ${_W_DIR} ..."
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zram_mount
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echo "Step 1/2: Removing not necessary files from / ..."
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clean_archboot
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echo "Step 2/2: Generating new iso files now in ${_W_DIR} ..."
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echo " This will need some time ..."
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"archboot-${_RUNNING_ARCH}-release.sh" "${_W_DIR}" >/dev/tty7 2>&1 || exit 1
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echo "Finished: New isofiles are located in ${_W_DIR}"
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