aggsum_value
uint64_t asize = aggsum_value(&arc_size);
uint64_t ameta = aggsum_value(&arc_meta_used);
uint64_t asize = aggsum_value(&arc_size);
ARCSTAT(arcstat_size) = aggsum_value(&arc_size);
ARCSTAT(arcstat_meta_used) = aggsum_value(&arc_meta_used);
ARCSTAT(arcstat_data_size) = aggsum_value(&astat_data_size);
aggsum_value(&astat_metadata_size);
ARCSTAT(arcstat_hdr_size) = aggsum_value(&astat_hdr_size);
ARCSTAT(arcstat_other_size) = aggsum_value(&astat_other_size);
ARCSTAT(arcstat_l2_hdr_size) = aggsum_value(&astat_l2_hdr_size);
uint64_t aggsum_value(aggsum_t *);