Rootfs size expansion

[NPal.2]

Hi ,

How can i increase the size of rootfs correctly?

I tried using gparted , but it looks like the tf-a iss't very happy with it and tries to reset it in correct way. So i would like to understand how can i increase its size more correctly since installing a lot of packages causes low disk space in rootfs and i would like to leverage space left on other drives to be used.

Any leads will be highly appreciated.

[Jean-Marc B]

Hello @NPal.2​ 

if possible, you can try to flash your board with the «extensible» flashlayout (*-extensible.tsv). Extensible flashlayout does not flash userfs partition to extend the rootfs partition to the size of the sdcard.

If not, you have to change the value of the variable IMAGE_ROOTFS_MAXSIZE in your image parameter (see the definition of this variable in the layer meta-st/meta-st-stm32mp in the file conf/machine/include/st-machine-common-stm32mp.inc.

Best regards,

--JM

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[NPal.2]

Hi @Jean-Marc B​ : Thanks for response. Let me try this and see what is happening.

[OlivierK]

Hi NPal.2 (Community Member)

You could also refer to this:

https://wiki.st.com/stm32mpu/wiki/How_to_populate_the_SD_card_with_dd_command

Here you can update the script "create_sdcard_from_flashlayout.sh" and change the field DEFAULT_ROOTFS_PARTITION_SIZE

according to your needs.

Best Regards

Olivier

[NPal.2]

Thanks @OlivierK​ : I think this sounds more good. I will definitely give this a try.

[OlivierK]

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[NPal.2]

Hi @Jean-Marc B​ and @OlivierK​ :

I tried above suggestion of modifying IMAGE_ROOTFS_MAXSIZE to value for 1.5GB. But it looks like system does not take it. Running df -h shows the root storage limited to 660MB . However doing lsblk shows it has size of 1.5GB. How to fix this ? Root partition still is limited to 660MB.

Filesystem Size Used Avail Use% Mounted on
/dev/root 660M 587M 24M 97% /
devtmpfs 181M 0 181M 0% /dev
tmpfs 246M 64K 245M 1% /dev/shm
tmpfs 246M 17M 229M 7% /run
tmpfs 246M 0 246M 0% /sys/fs/cgroup
tmpfs 246M 0 246M 0% /tmp
/dev/mmcblk0p2 58M 9.9M 44M 19% /boot
/dev/mmcblk0p3 15M 6.8M 6.7M 51% /vendor
tmpfs 246M 164K 245M 1% /var/volatile
/dev/mmcblk0p5 120M 8.9M 103M 8% /usr/local
tmpfs 50M 0 50M 0% /run/user/0
root@stm32mp157a-visionsom-rgb-emmc-mx:/usr/local# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
mmcblk0 179:0 0 3.7G 0 disk 
|-mmcblk0p1 179:1 0 4M 0 part 
|-mmcblk0p2 179:2 0 64M 0 part /boot
|-mmcblk0p3 179:3 0 16M 0 part /vendor
|-mmcblk0p4 179:4 0 1.5G 0 part /
`-mmcblk0p5 179:5 0 2.1G 0 part /usr/local
mmcblk0boot0 179:16 0 2M 1 disk 
mmcblk0boot1 179:32 0 2M 1 disk 

[Jean-Marc B]

Hello @NPal.2​ 

This topic may help you: https://community.st.com/s/question/0D53W00000jm0GnSAI/increasing-the-rootfs-size-on-a-stm32mp157fdk2

Best regards,

--JM

[NPal.2]

Thanks @Jean-Marc B​  This really helps...!!