SPA_OLD_MAXBLOCKSHIFT
int maxbs = SPA_OLD_MAXBLOCKSHIFT;
static const size_t data_size = 1 << SPA_OLD_MAXBLOCKSHIFT; /* 128kiB */
#define SPA_OLD_MAXBLOCKSIZE (1ULL << SPA_OLD_MAXBLOCKSHIFT)
#define BENCH_ZIO_SIZE (1ULL << SPA_OLD_MAXBLOCKSHIFT) /* 128 kiB */
leaf_blockshift <= SPA_OLD_MAXBLOCKSHIFT &&
indirect_blockshift <= SPA_OLD_MAXBLOCKSHIFT);
1 << (SPA_OLD_MAXBLOCKSHIFT - zv->zv_min_bs);