pool_walk
pool_walk(&vnode_pool, full, db_printf, vfs_vnode_print);
pool_walk(&bufpool, full, db_printf, vfs_buf_print);
pool_walk(&tdb_pool, full, db_printf, tdb_printit);
pool_walk(&nfsreqpl, full, db_printf, nfs_request_print);
pool_walk(&nfs_node_pool, full, db_printf, nfs_node_print);
void pool_walk(struct pool *, int, int (*)(const char *, ...),