I'm really sorry I applied that last series from Andrew just before doing the 4.8 release, because they cause problems, and now it is in 4.8 (and that buggy crap is marked for stable too). In particular, I just got this kernel BUG at ./include/linux/swap.h:276 and the end result was a dead kernel. The bug that commit 22f2ac51b6d64 ("mm: workingset: fix crash in shadow node shrinker caused by repla