Function mlx5_mr_garbage_collect

dpdk/drivers/common/mlx5/mlx5_common_mr.c:521–546

* Release resources of detached MR having no online entry. * * @param share_cache * Pointer to a global shared MR cache. */

 *   Pointer to a global shared MR cache.
 */
static void
mlx5_mr_garbage_collect(struct mlx5_mr_share_cache *share_cache)
{
	struct mlx5_mr *mr_next;
	struct mlx5_mr_list free_list = LIST_HEAD_INITIALIZER(free_list);

	/* Must be called from the primary process. */
	MLX5_ASSERT(rte_eal_process_type() == RTE_PROC_PRIMARY);
	/*
	 * MR can't be freed with holding the lock because rte_free() could call
	 * memory free callback function. This will be a deadlock situation.
	 */
	rte_rwlock_write_lock(&share_cache->rwlock);
	/* Detach the whole free list and release it after unlocking. */
	free_list = share_cache->mr_free_list;
	LIST_INIT(&share_cache->mr_free_list);
	rte_rwlock_write_unlock(&share_cache->rwlock);
	/* Release resources. */
	mr_next = LIST_FIRST(&free_list);
	while (mr_next != NULL) {
		struct mlx5_mr *mr = mr_next;

		mr_next = LIST_NEXT(mr, mr);
		mlx5_mr_free(mr, share_cache->dereg_mr_cb);
	}
}

/* Called during rte_memseg_contig_walk() by mlx5_mr_create(). */
static int