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Linux: K2L nand readonly filesystem issue

Tool/software: Linux

Hi Experts

We have a custom Keystone2 board running linux with latest kernel and rootfs. The problem
is the file system always become readonly after some time of normal

r/w operations. What's bad is I will not be able to enter linux in next boot process
suspending in “starting kernel...”.

It is a nand filesystem and in order to avoid this issue I make a new UBI filesystem with a
separate User part mounted to /home/user . However that does not solve the issue :-(

The problem always occurs after my using mmap in ARM side to communicate to DSP physical
address.

Any suggestions on this one?