The ext4 detection fails with the 2.6.28-rc kernels and grub thinks
that the fs is ext3 - this results in init not being found, which is
slightly not so nice.
The problem is, that in 2.6.28 ext4 no more has the test_fs flag set
(tune2fs -E test_fs ... ), without which the recognition of the fs
type fails. Adding the flag again makes it work. And e2fsck
automatically clears the test_fs flag when the fs is checked with the
new kernels. The rootfs was converted from ext3 by just doing
tune2fs -O extents /dev/...
The version of grub is from debian experimental, dated 2008-11-20.
I guess that for now, as a workaround I can use the rootfstype=ext4
boot parameter...
best regards,
-jouni
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