Yes, I backported 5e439ff 2016-01-05 aufs: for 4.3, XINO handles EINTR from the dying...
Thanks a lot. The longterm update to 3.18.25, patch-3.18.24-25.xz, contains the upstream...
3.18.1+ up to 20160118: Unkillable 100% sys task in au_xino_do_write