PUFFS fs clean exit

[manu%netbsd.org@localhost (Emmanuel Dreyfus)]

Hello

I sometimes get a kernel panic (uvm_fault) when perfused exits because
the FUSE filesystem died. The backtrace is below. As I understand the
problem is that the kernel part of PUFFS sends PUFFS requests to flush
vnode after the PUFFS server called exit(). It suggests something must
be to discard data to be flushed before calling exit(), but what?

mutex_vector_enter
puffs_vnop_fsync
VOP_FSYNC
vinvalbuf
vclean
vflush
puffs_vfsop_unmount
dounmount
puffs_msgif_close
putter_fop_close
closef
fd_close
fd_free
exit1
sys_exit
syscall

-- 
Emmanuel Dreyfus
http://hcpnet.free.fr/pubz
manu%netbsd.org@localhost