Yesterday I saw oom killer knocking off processes during a simple cp -a from one Btrfs to another, in a VM, with kernel 4.8.0-0.rc0.git3.1.fc25.x86_64. The call trace looks different than Markus' so I'm not sure it's the same problem. It's not always reproducible. It hasn't happened on 4.7.0 though. According ot koji this is Linux v4.7-6438-gc624c86
This is 'journalctl -o short-monotonic -b-4 -k' https://drive.google.com/open?id=0B_2Asp8DGjJ9ZC1JSDJnaWpnSEE Chris Murphy
