[Buildroot] Need help with genimage

[Jörg Krause]

Hi Baruch,

On Sun, 2017-01-08 at 19:45 +0200, Baruch Siach wrote:
> Hi Jörg,
> 
> On Sun, Jan 08, 2017 at 12:58:51PM +0100, Jörg Krause wrote:
> > I am able to generate the sd card image and copy it to the sd card
> > using Suses imagewriter. The board boots fine. However, the rootfs
> > size
> > is not 512MB as expected:
> > 
> > # df -hT
> > Filesystem           Type            Size      Used Available Use%
> > Mounted on
> > /dev/root            ext4           38.7M     37.9M         0 100%
> > /
> > devtmpfs             devtmpfs      501.9M         0    501.9M   0%
> > /dev
> > tmpfs                tmpfs         502.4M         0    502.4M   0%
> > /dev/shm
> > tmpfs                tmpfs         502.4M      3.9M    498.4M   1%
> > /tmp
> > tmpfs                tmpfs         502.4M     24.0K    502.4M   0%
> > /run
> > 
> > I am not able to create any file larger file on the filesystem nor
> > start some programs.
> > 
> > What am I missing here? Can somebody enlighten me please :-)
> 
> Unless you set BR2_TARGET_ROOTFS_EXT2_BLOCKS and
> BR2_TARGET_ROOTFS_EXT2_INODES 
> you'll get a minimal ext2/3/4 filesystem with no free space.
> Alternatively, 
> you may run on target the resize2fs tool from the e2fsprogs package
> on the 
> root filesystem to expand the filesystem to the size of the
> partition.

Which values should I use for blocks and inodes if I set the rootfs
size to 512M in genimage.cfg? Any suggestions?

Jörg