selftests/mm/ksm_tests.c

202 	void *map_ptr = mmap(ptr, map_size, PROT_WRITE, mapping, -1, 0);
204 	if (!map_ptr) {
208 	memset(map_ptr, data, map_size);
209 	if (mprotect(map_ptr, map_size, prot)) {
211 		munmap(map_ptr, map_size);
215 	return map_ptr;
350 	void *map_ptr;
359 	map_ptr = allocate_memory(NULL, prot, mapping, '*', page_size * page_count);
360 	if (!map_ptr)
363 	if (ksm_merge_pages(merge_type, map_ptr, page_size * page_count, start_time, timeout))
369 		munmap(map_ptr, page_size * page_count);
377 	munmap(map_ptr, page_size * page_count);
383 	void *map_ptr;
393 	map_ptr = allocate_memory(NULL, prot, mapping, '*', page_size * page_count);
394 	if (!map_ptr)
397 	if (ksm_merge_pages(merge_type, map_ptr, page_size * page_count, start_time, timeout))
401 	memset(map_ptr, '-', 1);
402 	memset(map_ptr + page_size, '+', 1);
411 		munmap(map_ptr, page_size * page_count);
417 	munmap(map_ptr, page_size * page_count);
424 	void *map_ptr;
436 	map_ptr = allocate_memory(NULL, prot, mapping, 0, page_size * page_count);
437 	if (!map_ptr)
440 	if (ksm_merge_pages(merge_type, map_ptr, page_size * page_count, start_time, timeout))
456 	munmap(map_ptr, page_size * page_count);
461 	munmap(map_ptr, page_size * page_count);
553 	void *map_ptr, *map_ptr_orig;
564 	map_ptr = map_ptr_orig + HPAGE_SIZE - (uintptr_t)map_ptr_orig % HPAGE_SIZE;
569 	if (madvise(map_ptr, len, MADV_HUGEPAGE))
578 	for (void *p = map_ptr; p < map_ptr + len; p += HPAGE_SIZE) {
587 	memset(map_ptr, '*', len);
593 	if (ksm_merge_pages(merge_type, map_ptr, map_size, start_time, timeout))
620 	void *map_ptr;
626 	map_ptr = allocate_memory(NULL, prot, mapping, '*', map_size);
627 	if (!map_ptr)
634 	if (ksm_merge_pages(merge_type, map_ptr, map_size, start_time, timeout))
650 	munmap(map_ptr, map_size);
655 	munmap(map_ptr, map_size);
661 	void *map_ptr;
667 	map_ptr = allocate_memory(NULL, prot, mapping, '*', map_size);
668 	if (!map_ptr)
674 	if (ksm_merge_pages(merge_type, map_ptr, map_size, start_time, timeout))
681 	if (ksm_unmerge_pages(map_ptr, map_size, start_time, timeout))
697 	munmap(map_ptr, map_size);
702 	munmap(map_ptr, map_size);
708 	void *map_ptr;
715 	map_ptr = allocate_memory(NULL, prot, mapping, '*', page_size * page_count);
716 	if (!map_ptr)
724 		memset(map_ptr + page_size * i, '-', 1);
742 		memset(map_ptr + page_size * i, '+', i / 2 + 1);
743 		memset(map_ptr + page_size * (i + 1), '+', i / 2 + 1);
745 	if (ksm_merge_pages(merge_type, map_ptr, page_size * page_count, start_time, timeout))
753 		memset(map_ptr + page_size * i, '-', 1);
768 	munmap(map_ptr, page_size * page_count);
773 	munmap(map_ptr, page_size * page_count);