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Enanling Zswap

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This commit is contained in:
Aleksey Samoilov 2022-07-25 13:46:00 +04:00
parent 0cfd62f14e
commit 6dd83fdc2c
2 changed files with 50 additions and 4 deletions
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52
build-rpi.sh
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@ -71,9 +71,9 @@ EOF
# Configure mount points
cat << EOF > ubuntusway-${architecture}/etc/fstab
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc nodev,noexec,nosuid 0 0
LABEL=writable / ext4 defaults,noatime 0 0
LABEL=system-boot /boot/firmware vfat defaults 0 1
proc /proc proc nodev,noexec,nosuid 0 0
LABEL=writable / ext4 discard,noatime 0 1
LABEL=system-boot /boot/firmware vfat defaults 0 1
EOF
export LC_ALL=C
@ -159,6 +159,52 @@ EOF
chmod +x ubuntusway-$architecture/user
LANG=C chroot ubuntusway-$architecture /user
# Creating swapfile service
# Adds lz4 and z3fold modules to initramfs.
# - https://ubuntu.com/blog/how-low-can-you-go-running-ubuntu-desktop-on-a-2gb-raspberry-pi-4
echo lz4 >> ubuntusway-$architecture/etc/initramfs-tools/modules
echo z3fold >> ubuntusway-$architecture/etc/initramfs-tools/modules
mkdir -p ubuntusway-$architecture/usr/lib/systemd/system/swap.target.wants
cat <<EOF >> ubuntusway-$architecture/usr/lib/systemd/system/mkswap.service
[Unit]
Description=Create the default swapfile
DefaultDependencies=no
Requires=local-fs.target
After=local-fs.target
Before=swapfile.swap
ConditionPathExists=!/swapfile
[Service]
Type=oneshot
ExecStartPre=fallocate -l 1GiB /swapfile
ExecStartPre=chmod 600 /swapfile
ExecStart=mkswap /swapfile
[Install]
WantedBy=swap.target
EOF
cat <<EOF >> ubuntusway-$architecture/usr/lib/systemd/system/swapfile.swap
[Unit]
Description=The default swapfile
[Swap]
What=/swapfile
EOF
cat <<EOF >> ubuntusway-$architecture/enable_zswap
#!/bin/bash
ln -s /usr/lib/systemd/system/mkswap.service /usr/lib/systemd/system/swap.target.wants/mkswap.service
ln -s /usr/lib/systemd/system/swapfile.swap /usr/lib/systemd/system/swap.target.wants/swapfile.swap
rm -f enable_zswap
EOF
chmod +x ubuntusway-$architecture/enable_zswap
LANG=C chroot ubuntusway-$architecture /enable_zswap
# Calculate the space to create the image.
root_size="$(du -s -B1K ubuntusway-$architecture | cut -f1)"
raw_size="$(($((free_space*1024))+root_size))"

2
rpi/rootfs/system-boot/cmdline.txt
View file

@ -1 +1 @@
dwc_otg.lpm_enable=0 console=tty1 root=LABEL=writable rootfstype=ext4 rootwait fixrtc quiet splash
zswap.enabled=1 zswap.zpool=z3fold zswap.compressor=lz4 dwc_otg.lpm_enable=0 console=tty1 root=LABEL=writable rootfstype=ext4 rootwait fixrtc quiet splash