Function init_dir_mutex

name-hash.c:238–246

* Initialize n mutexes for use when searching and inserting * into "istate->dir_hash". All "dir" threads are trying * to insert partial pathnames into the hash as they iterate * over their portions of the index, so lock contention is * high. * * However, the hashmap is going to put items into bucket * chains based on their hash values. Use that to create n * mutexes and lock on mutex[buc

 * decrease the collision rate by (hopefully) a factor of n.
 */
static void init_dir_mutex(void)
{
	int j;

	CALLOC_ARRAY(lazy_dir_mutex_array, LAZY_MAX_MUTEX);

	for (j = 0; j < LAZY_MAX_MUTEX; j++)
		init_recursive_mutex(&lazy_dir_mutex_array[j]);
}

static void cleanup_dir_mutex(void)
{