[fuse-devel] Deadlock during release after umount

[Yariv O. <ya...@ju...>]

Hi

In case of release after umount the fuse_release_common send 
FUSE_RELEASE async and hang an req->end function, than the the answer 
coming back (the fuse_dev_writev function) and invoke the 
fuse_release_end that was hang before. There the mnt_count is 0 (because 
of the umount detach before) and the the fuse_release_end issues a 
FUSE_DESTROY request back up but thisis sync reqeust (waiting for an 
answer).

Here is the deadlock, the fuse is blocking, waiting for the answer on the
DESTROY request, but the user space is still waiting for the previous 
answer (on the release
request) to return!

Any fix for this?

Regards, Yariv