Unsigned integer
1 (enabled)
0 (disabled), 1 (enabled)
Yes, but do not change this tunable dynamically. It is possible to enable it if originally disabled, or to disable it if originally enabled. However, enabling, disabling, and then enabling this parameter might lead to stale directory caches.
No
Directory caching has no known problems, but if problems occur, then set dnlc_dir_enable to 0 to disable caching.
Unstable