Function init_buffers

test/vec-regbuf.c:112–139

}

static void init_buffers(struct buf_desc *bd, size_t size)
{
	void *start;
	void *mem;

	start = mmap(NULL, size + page_sz * 2, PROT_NONE,
			MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, -1, 0);
	if (start == MAP_FAILED) {
		fprintf(stderr, "Unable to preserve the page mixture memory.\n");
		exit(1);
	}

	mem = mmap(start + page_sz, size, PROT_READ | PROT_WRITE,
		   MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
	if (mem == MAP_FAILED) {
		fprintf(stderr, "mmap fail\n");
		exit(1);
	}

	memset(bd, 0, sizeof(*bd));
	bd->size = size;
	bd->buf_wr = mem;
	bd->buf_rd = malloc(size);
	if (!bd->buf_rd) {
		fprintf(stderr, "malloc fail\n");
		exit(1);
	}
}

static int verify_data(struct buf_desc *bd, struct iovec *wr_vecs, int nr_iovec,
			int fd)