Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Since I've had near-to-no feedback from both Linbit and Proxmox guys, I've downgraded my two nodes setup to DRBD 8.4. It now works without issues. I've put my downgrading notes in a blog post; I hope it will be useful for other users too. http://coolsoft.altervista.org/blog/2016/02/proxmox-41-kernel-panic-downgrade-drbd-resources-drbd-9-84