how can I modify the size of overlay partition?

[iwbkwi]

Below, i attach a result of linux shell command 'df -h' on baremetal switch with onl image.

I'd like to know how to modify the size of overlay partition.

I just found files named 'swiprep' and 'boot' located in 'OpenNetworkLinux/packages/base/all/initrds/loader-initrd-files/src/bin'

Though I modified the files I found, it seems that nothing changed..

Which file should I change?

============================ Filesystem Size Used Avail Use% Mounted on devtmpfs 1.0M 0 1.0M 0% /dev overlay 301M 278M 23M 93% / /dev/sda3 976M 316M 594M 35% /mnt/onl/images /dev/sda4 6.1G 15M 5.7G 1% /mnt/onl/data /dev/sda1 123M 20M 98M 17% /mnt/onl/boot /dev/sda2 120M 1.6M 110M 2% /mnt/onl/config tmpfs 201M 416K 200M 1% /run tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs 401M 0 401M 0% /run/shm