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

[Thomas Huth]

On 22.03.2016 07:22, Nikunj A Dadhania wrote:
> 
> 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.

Right. I think you can use an ext2 partition with an ext4 driver, but
not the other way round.

 Thomas