FM / hooks

/usr/share/initramfs-tools/hooks

Name	Size	Mode	Actions
bcache	543	0755	edit dl rm
btrfs	568	0755	edit dl rm
cloud-initramfs-dyn-netconf	118	0755	edit dl rm
compcache	3633	0755	edit dl rm
console_setup	3142	0755	edit dl rm
copymods	280	0755	edit dl rm
cryptgnupg	921	0755	edit dl rm
cryptgnupg-sc	2242	0755	edit dl rm
cryptkeyctl	424	0755	edit dl rm
cryptopensc	1676	0755	edit dl rm
cryptpassdev	888	0755	edit dl rm
cryptroot	17244	0755	edit dl rm
cryptroot-unlock	637	0755	edit dl rm
dmsetup	506	0755	edit dl rm
fixrtc	436	0755	edit dl rm
framebuffer	579	0755	edit dl rm
fsck	1983	0755	edit dl rm
fuse	230	0755	edit dl rm
iscsi	732	0755	edit dl rm
kbd	301	0755	edit dl rm
klibc-utils	646	0755	edit dl rm
kmod	432	0755	edit dl rm
lvm2	670	0755	edit dl rm
mdadm	2897	0755	edit dl rm
ntfs_3g	304	0755	edit dl rm
overlayroot	732	0755	edit dl rm
plymouth	5873	0755	edit dl rm
resume	3116	0755	edit dl rm
sg3-utils	485	0755	edit dl rm
thermal	1324	0755	edit dl rm
thin-provisioning-tools	369	0755	edit dl rm
udev	1703	0755	edit dl rm
xfs	850	0755	edit dl rm
zz-busybox-initramfs	2233	0755	edit dl rm
zz-dhclient	411	0755	edit dl rm

Edit: /usr/share/initramfs-tools/hooks/compcache (3633B)

#!/bin/sh
set -e

if [ "$1" = prereqs ]; then
  exit 0
fi

. /usr/share/initramfs-tools/hook-functions

number=
suffix=
# shellcheck disable=SC2046
eval $(printf "%s" "$COMPCACHE_SIZE" | \
       sed -nre 's/^ *([1-9][0-9]*) *([%KMGT]) *$/number="\1"; suffix="\2";/p')

if [ -z "$number" ] || [ -z "$suffix" ]; then
  exit 0
fi

if have_module zram; then
  name=zram
  manual_add_modules zram
elif have_module ramzswap; then
  name=ramzswap
  manual_add_modules ramzswap
elif have_module compcache; then
  name=compcache
  manual_add_modules compcache
else
  exit 0
fi

copy_exec /sbin/swapon
copy_exec /sbin/mkswap
copy_exec /usr/lib/initramfs-tools/bin/rzscontrol /sbin

mem_total="\$(sed -nre 's/^MemTotal:\\s*([0-9]+) kB\$/\\1/p' /proc/meminfo)"

case "$suffix" in
%) kbytes="\$(($mem_total * $number / 100))" ;;
K) kbytes=$((number))                       ;;
M) kbytes=$((number * 1024))                ;;
G) kbytes=$((number * 1024 * 1024))         ;;
T) kbytes=$((number * 1024 * 1024 * 1024))  ;;
esac

cat >"$DESTDIR"/sbin/compcache-enable <<'EOF'
#!/bin/sh
if [ "$#" != 3 ]; then
	echo "Usage: $0 <type> <size> <device>" 1>&2
	exit 1
fi
type="$1"
size="$2"
device="$3"

number=
suffix=
eval $(printf "%s" "$size" | \
       sed -nre 's/^ *([1-9][0-9]*) *([%KMGT]) *$/number="\1"; suffix="\2";/p')

mem_total="$(sed -nre 's/^MemTotal:\s*([0-9]+) kB$/\1/p' /proc/meminfo)"

case "$suffix" in
%) kbytes="$(($mem_total * $number / 100))" ;;
K) kbytes=$(($number))                       ;;
M) kbytes=$(($number * 1024))                ;;
G) kbytes=$(($number * 1024 * 1024))         ;;
T) kbytes=$(($number * 1024 * 1024 * 1024))  ;;
esac
bytes="$(($kbytes * 1024))"

if [ "$type" = zram ]; then
	echo "$bytes" >/sys/block/$device/disksize && \
	/sbin/mkswap "/dev/$device" >/dev/null

elif [ "$type" = ramzswap ]; then
	/sbin/rzscontrol "/dev/$device" --disksize_kb="$kbytes" --init
fi
/sbin/swapon -p 100 "/dev/$device" 2>/dev/null

exit 0
EOF
chmod 0755 "$DESTDIR"/sbin/compcache-enable

mkdir -p "$DESTDIR"/etc/udev/rules.d
if [ "$name" = zram ]; then
  cat >"$DESTDIR"/etc/udev/rules.d/80-compcache.rules <<EOF
KERNEL=="zram0", ACTION=="add", \\
  RUN+="/sbin/compcache-enable zram $COMPCACHE_SIZE zram0"
EOF
elif [ "$name" = ramzswap ]; then
  cat >"$DESTDIR"/etc/udev/rules.d/80-compcache.rules <<EOF
KERNEL=="ramzswap0", ACTION=="add", \\
  RUN+="/sbin/compcache-enable ramzswap $COMPCACHE_SIZE ramzswap0"
EOF
else
  cat >"$DESTDIR"/etc/udev/rules.d/80-compcache.rules <<EOF
KERNEL=="ramzswap0", ACTION=="add", \\
  RUN+="/sbin/compcache-enable compcache $COMPCACHE_SIZE ramzswap0"
EOF
fi

cat >"$DESTDIR"/scripts/init-top/compcache <<EOF
#!/bin/sh

PREREQ=""
prereqs()
{
     echo "\$PREREQ"
}

case \$1 in
prereqs)
     prereqs
     exit 0
     ;;
esac

# find total amount of available ram
TOTAL_RAM=\$( grep MemTotal /proc/meminfo |tr -d ': [A-Z][a-z]')

# Do not use compcache on the liveCD if we have more than 512M
if [ "\${BOOT}" = "casper" ]; then
    if [ "\${TOTAL_RAM}" -gt 524288 ]; then
        exit 0
    fi
fi

for x in \$(cat /proc/cmdline); do
        case \${x} in
        nocompcache)
                exit 0
        ;;
        esac
done

EOF

if [ "$name" = zram ]; then
  cat >>"$DESTDIR"/scripts/init-top/compcache <<EOF
modprobe -q --ignore-install zram
EOF
elif [ "$name" = ramzswap ]; then
  cat >>"$DESTDIR"/scripts/init-top/compcache <<EOF
modprobe -q --ignore-install ramzswap
EOF
else
  cat >>"$DESTDIR"/scripts/init-top/compcache <<EOF
modprobe -q --ignore-install compcache compcache_size_kbytes="$kbytes"
EOF
fi

chmod 0755 "$DESTDIR"/scripts/init-top/compcache

# vim:set et sw=2 sts=2:

#!/bin/sh set -e if [ "$1" = prereqs ]; then exit 0 fi . /usr/share/initramfs-tools/hook-functions number= suffix= # shellcheck disable=SC2046 eval $(printf "%s" "$COMPCACHE_SIZE" | \ sed -nre 's/^ *([1-9][0-9]*) *([%KMGT]) *$/number="\1"; suffix="\2";/p') if [ -z "$number" ] || [ -z "$suffix" ]; then exit 0 fi if have_module zram; then name=zram manual_add_modules zram elif have_module ramzswap; then name=ramzswap manual_add_modules ramzswap elif have_module compcache; then name=compcache manual_add_modules compcache else exit 0 fi copy_exec /sbin/swapon copy_exec /sbin/mkswap copy_exec /usr/lib/initramfs-tools/bin/rzscontrol /sbin mem_total="\$(sed -nre 's/^MemTotal:\\s*([0-9]+) kB\$/\\1/p' /proc/meminfo)" case "$suffix" in %) kbytes="\$(($mem_total * $number / 100))" ;; K) kbytes=$((number)) ;; M) kbytes=$((number * 1024)) ;; G) kbytes=$((number * 1024 * 1024)) ;; T) kbytes=$((number * 1024 * 1024 * 1024)) ;; esac cat >"$DESTDIR"/sbin/compcache-enable <<'EOF' #!/bin/sh if [ "$#" != 3 ]; then echo "Usage: $0 " 1>&2 exit 1 fi type="$1" size="$2" device="$3" number= suffix= eval $(printf "%s" "$size" | \ sed -nre 's/^ *([1-9][0-9]*) *([%KMGT]) *$/number="\1"; suffix="\2";/p') mem_total="$(sed -nre 's/^MemTotal:\s*([0-9]+) kB$/\1/p' /proc/meminfo)" case "$suffix" in %) kbytes="$(($mem_total * $number / 100))" ;; K) kbytes=$(($number)) ;; M) kbytes=$(($number * 1024)) ;; G) kbytes=$(($number * 1024 * 1024)) ;; T) kbytes=$(($number * 1024 * 1024 * 1024)) ;; esac bytes="$(($kbytes * 1024))" if [ "$type" = zram ]; then echo "$bytes" >/sys/block/$device/disksize && \ /sbin/mkswap "/dev/$device" >/dev/null elif [ "$type" = ramzswap ]; then /sbin/rzscontrol "/dev/$device" --disksize_kb="$kbytes" --init fi /sbin/swapon -p 100 "/dev/$device" 2>/dev/null exit 0 EOF chmod 0755 "$DESTDIR"/sbin/compcache-enable mkdir -p "$DESTDIR"/etc/udev/rules.d if [ "$name" = zram ]; then cat >"$DESTDIR"/etc/udev/rules.d/80-compcache.rules <"$DESTDIR"/etc/udev/rules.d/80-compcache.rules <"$DESTDIR"/etc/udev/rules.d/80-compcache.rules <"$DESTDIR"/scripts/init-top/compcache <>"$DESTDIR"/scripts/init-top/compcache <>"$DESTDIR"/scripts/init-top/compcache <>"$DESTDIR"/scripts/init-top/compcache <