SFIFO_TEST (rv == 0, "chunk prealloc should work");
rv = fifo_segment_num_free_chunks (fs, 4096);
SFIFO_TEST (rv == 50, "prealloc chunks expected %u is %u", 50, rv);
SFIFO_TEST (rv == 0, "chunk prealloc should work");
rv = fifo_segment_num_free_chunks (fs, 4096);
SFIFO_TEST (rv == 50, "prealloc chunks expected %u is %u", 50, rv);