These example filesystems always send their reply from the per-queue
io-uring worker thread. The ones that run a helper thread use it only
for cache-invalidation notifications over /dev/fuse, not ring
submissions, so they too satisfy the io_uring_single_issuer contract.
Call fuse_set_conn_flag(conn, FUSE_CONN_FLAG_SINGLE_ISSUER) in their
init() handlers so they take the lock-free, registered-ring-fd fast
path. It is harmless when io-uring is not in use.
Signed-off-by: Bernd Schubert <bernd@bsbernd.com>
Bernd Schubert