knc1 suggested here using different filesystem for the overlay instead of mini_fo:
https://www.mobileread.com/forums/sho...4&postcount=60
Althoug kindle kernel is older as he says we still could be able to use older version of auFS. From the auFS site
Quote:
linux kernel version aufs version
2.6.31 ... 2.6.34 aufs2.1, Unsupported since Aug 2011
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EDIT: I forgot to mention that KT uses 2.6.31 kernel.
I have no objection to using something else. I have never worked with overlay filesystem and I made use of mini_fo only because nueva suggested it and because OpenWRT guys seem to be using it happily. The problem with mini_fo however is that it hasn't been updated by the author for last 5 years and it only works because OpenWRT has buch of it's own patches to support newer kernels.
So if you have any other ideas feel free to share.