selftests/mm/cow.c

34 static size_t pagesize;
46 	return __builtin_ctzll(size / pagesize);
67 		kb = (pagesize >> 10) << i;
102 	for (; size; addr += pagesize, size -= pagesize)
718 	mem = mmap(NULL, pagesize, PROT_READ | PROT_WRITE,
725 	ret = madvise(mem, pagesize, MADV_NOHUGEPAGE);
733 	memset(mem, 0, pagesize);
736 		madvise(mem, pagesize, MADV_PAGEOUT);
743 	fn(mem, pagesize);
745 	munmap(mem, pagesize);
800 	if (!pagemap_is_populated(pagemap_fd, mem + thpsize - pagesize)) {
819 		ret = mprotect(mem + pagesize, pagesize, PROT_READ);
824 		ret = mprotect(mem + pagesize, pagesize, PROT_READ | PROT_WRITE);
836 		ret = madvise(mem + pagesize, thpsize - pagesize, MADV_DONTNEED);
841 		size = pagesize;
869 		ret = madvise(mem + pagesize, thpsize - pagesize, MADV_DONTFORK);
883 		ret = madvise(mem + pagesize, thpsize - pagesize, MADV_DOFORK);
1209 	ret = mprotect(mem + pagesize, pagesize, PROT_READ);
1214 	ret = mprotect(mem + pagesize, pagesize, PROT_READ | PROT_WRITE);
1441 	mem = mmap(NULL, pagesize, PROT_READ | PROT_WRITE,
1448 	smem = mmap(NULL, pagesize, PROT_READ, MAP_PRIVATE | MAP_ANON, -1, 0);
1458 	fn(mem, smem, pagesize);
1460 	munmap(mem, pagesize);
1462 		munmap(smem, pagesize);
1511 	if (!pagemap_is_populated(pagemap_fd, mem + pagesize) ||
1512 	    !pagemap_is_populated(pagemap_fd, smem + pagesize)) {
1538 	if (fallocate(fd, 0, 0, pagesize)) {
1544 	mem = mmap(NULL, pagesize, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
1549 	smem = mmap(NULL, pagesize, PROT_READ, MAP_SHARED, fd, 0);
1559 	fn(mem, smem, pagesize);
1561 	munmap(mem, pagesize);
1563 		munmap(smem, pagesize);
1589 	if (fallocate(fd, 0, 0, pagesize)) {
1595 	mem = mmap(NULL, pagesize, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
1600 	smem = mmap(NULL, pagesize, PROT_READ, MAP_SHARED, fd, 0);
1610 	fn(mem, smem, pagesize);
1612 	munmap(mem, pagesize);
1614 		munmap(smem, pagesize);
1743 	pagesize = getpagesize();