# Place this file on /etc/rc.d/functions.d/swap_on_zram
# Accepts kernel command line parameter: swap_zram_size=NNN,
# where NNN is the size in MiB for zram block device.

swap_on_zram ()
{
    swap_zram_size=$(kernel_cmdline swap_zram_size)
    if [[ -n ${swap_zram_size} && ! -L /dev/disk/by-label/swap_on_zram ]]; then
        modprobe zram
        echo $((swap_zram_size*2**20)) > /sys/block/zram0/disksize
        mkswap -L swap_on_zram /dev/zram0
        swapon /dev/zram0
    fi
}

add_hook multi_end swap_on_zram