Hmm, there are a whole lot of the null reference errors there, all caused by BFQ. Not good. Could you check that /syspart is being mounted correctly, and that bfq.ioprio, bfq.ioprio_class and bfq.weight are all present under that directory (when BFQ is the default scheduler, of course)? You could set it just for mmcblk1, if you've an external SD.. I am guessing that /usr/lib/libohm_cgroups.so is present and loaded?