image size on 20.xx builds

[Bjoern Franke]

Hi,

I'm trying to create an image for an Archer C50v1 (mt7620).

Tryin to build an image with the following packages[1] using the 
imagebuilder was impossible because the image got too big:
Building images...
Parallel mksquashfs: Using 1 processor
Creating 4.0 filesystem on 
/data2/openwrt/openwrt-imagebuilder-ramips-mt7620.Linux-x86_64/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7620/root.squashfs, 
block size 262144.
Pseudo file "/dev" exists in source filesystem 
"/data2/openwrt/openwrt-imagebuilder-ramips-mt7620.Linux-x86_64/build_dir/target-mipsel_24kc_musl/root-ramips/dev".
Ignoring, exclude it (-e/-ef) to override.
[===================================================================================================================|] 
1224/1224 100%

Exportable Squashfs 4.0 filesystem, xz compressed, data block size 262144
	compressed data, compressed metadata, compressed fragments,
	no xattrs, compressed ids
	duplicates are removed
Filesystem size 5948.36 Kbytes (5.81 Mbytes)
	35.45% of uncompressed filesystem size (16780.56 Kbytes)
Inode table size 13168 bytes (12.86 Kbytes)
	22.60% of uncompressed inode table size (58259 bytes)
Directory table size 16902 bytes (16.51 Kbytes)
	45.12% of uncompressed directory table size (37458 bytes)
Number of duplicate files found 157
Number of inodes 1678
Number of files 1202
Number of fragments 37
Number of symbolic links  362
Number of device nodes 1
Number of fifo nodes 0
Number of socket nodes 0
Number of directories 113
Number of ids (unique uids + gids) 1
Number of uids 1
	root (0)
Number of gids 1
	root (0)
[mktplinkfw2] rootfs offset aligned to 0x2070452
[mktplinkfw2] *** error: images are too big

Is this related to the switch of kernel 4.14 to 5.4?

Regards
Bjoern

[1]
luci-proto-wireguard luci-app-wireguard wireguard usb-modeswitch 
kmod-usb-net-cdc-ether dnsmasq-full mtr stubby luci-app-vnstat 
luci-proto-vpnc