[SLOF] Bug: SLOF and booting from grub's core.elf inside ext partition

Nikunj A Dadhania nikunj at linux.vnet.ibm.com
Tue Mar 22 17:22:44 AEDT 2016

Hi Frederic,

Frederic Bonnard <frediz at linux.vnet.ibm.com> writes:
> Hi
> according to Nikunj, the following seems to be a bug.
> I tried to make SLOF boot from grub's core.elf within an ext4 partition (GPT
> partition table).

> What I thought and that Nikunj confirmed is that ext4 should be
> backward compatible with ext2 which SLOF handles.

I checked with a filesystem expert. Our assumption that ext4 is backward
compatible to ext2 isnt correct. So the ext2 driver in the SLOF will not
be able to read this partition.

We would need to write a new driver for EXT4 read support in SLOF.


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