BATCHSIZE
uid_t idbuf[NTHREAD*BATCHSIZE];
b[i].base = RIDBASE + i * BATCHSIZE;
b[i].count = BATCHSIZE;
b[i].idbuf = &idbuf[i * BATCHSIZE];
b[i].statbuf = calloc(BATCHSIZE, sizeof (idmap_stat));
b[i].statbuf2 = calloc(BATCHSIZE, sizeof (idmap_stat));
for (j = 0; j < BATCHSIZE; j++) {
qsort(idbuf, NTHREAD*BATCHSIZE, sizeof (uid_t), cmpugid);
for (i = 1; i < NTHREAD*BATCHSIZE; i++) {