Comment 29 for bug 1495871

Considering bug 1498816, and the new-ish bufferstream logic in Mir's SessionMediator, I'm suspicious that Mir might just be indefinitely bloated, never releasing some resources until shutdown. It's a bit scary that the bufferstream logic is passing around raw pointers without any clear ownership. We may well be holding some for too long. Which is exactly the kind of resource that would be seen as "anon_inode:dmabuf".