[fuse] Status report #6

[Ilya Putsikau]

Project: Finish porting fuse

Fuse is now marked MPSAFE. But it still has issues. I've fixed vm page
locking on 9-CURRENT and ported user space daemon reply timeout
functionality. I've started cleaning up mmap-related code to pass fsx
test, but it's far from complete.

Tasks:

1. Debug kernel - daemon inode inconsistency. Kernel opens by  number
inode which is unknown for daemon. It may be source of blogbench
freeze I observe.

2. Fix mmap, test with fsx