+ switch (td->o.dedupe_mode) {
+ case DEDUPE_MODE_REPEAT:
+ /*
+ * The caller advances the returned frand_state.
+ * A copy of prev should be returned instead since
+ * a subsequent intention to generate a deduped buffer
+ * might result in generating a unique one
+ */
+ frand_copy(&td->buf_state_ret, &td->buf_state_prev);
+ return &td->buf_state_ret;
+ case DEDUPE_MODE_WORKING_SET:
+ i = rand_between(&td->dedupe_working_set_index_state, 0, td->num_unique_pages - 1);
+ frand_copy(&td->buf_state_ret, &td->dedupe_working_set_states[i]);
+ return &td->buf_state_ret;
+ default:
+ log_err("unexpected dedupe mode %u\n", td->o.dedupe_mode);
+ assert(0);
+ }