Use MUTEX_FSTRANS on l2arc_buflist_mtx
Use MUTEX_FSTRANS on l2arc_buflist_mtx to prevent the following deadlock
scenario:
- arc_release() -> hash_lock -> l2arc_buflist_mtx
- l2arc_write_buffers() -> l2arc_buflist_mtx -> (direct reclaim) -> arc_buf_remove_ref() -> hash_lock
Signed-off-by: Chunwei Chen <tuxoko@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Signed-off-by: Tim Chase <tim@chase2k.com>
Issue #3160