linux-master/mm/page_isolation.c

38 	unsigned long pfn;
55 	for (pfn = start_pfn; pfn < end_pfn; pfn++) {
56 		page = pfn_to_page(pfn);
93 			pfn += skip_pages - 1;
105 				pfn += (1 << buddy_order(page)) - 1;
267 __first_valid_page(unsigned long pfn, unsigned long nr_pages)
274 		page = pfn_to_online_page(pfn + i);
285  * @boundary_pfn:		pageblock-aligned pfn that a page might cross
312 	unsigned long pfn;
365 	for (pfn = start_pfn; pfn < boundary_pfn;) {
366 		struct page *page = __first_valid_page(pfn, boundary_pfn - pfn);
369 		pfn = page_to_pfn(page);
378 			if (pfn + (1UL << order) > boundary_pfn) {
380 				if (split_free_page(page, order, boundary_pfn - pfn))
384 			pfn += 1UL << order;
397 				pfn = head_pfn + nr_pages;
450 				 * reset pfn to the head of the free page, so
456 				 * freed, the free page order is not. Use pfn within
460 				outer_pfn = pfn;
467 				pfn = outer_pfn;
474 		pfn++;
532 	unsigned long pfn;
558 	for (pfn = isolate_start + pageblock_nr_pages;
559 	     pfn < isolate_end - pageblock_nr_pages;
560 	     pfn += pageblock_nr_pages) {
561 		page = __first_valid_page(pfn, pageblock_nr_pages);
564 			undo_isolate_page_range(isolate_start, pfn, migratetype);
586 	unsigned long pfn;
591 	for (pfn = isolate_start;
592 	     pfn < isolate_end;
593 	     pfn += pageblock_nr_pages) {
594 		page = __first_valid_page(pfn, pageblock_nr_pages);
605  * Returns the last tested pfn.
608 __test_page_isolated_in_pageblock(unsigned long pfn, unsigned long end_pfn,
613 	while (pfn < end_pfn) {
614 		page = pfn_to_page(pfn);
621 			pfn += 1 << buddy_order(page);
624 			pfn++;
632 			pfn++;
637 	return pfn;
658 	unsigned long pfn, flags;
668 	for (pfn = start_pfn; pfn < end_pfn; pfn += pageblock_nr_pages) {
669 		page = __first_valid_page(pfn, pageblock_nr_pages);
674 	if ((pfn < end_pfn) || !page) {
682 	pfn = __test_page_isolated_in_pageblock(start_pfn, end_pfn, isol_flags);
685 	ret = pfn < end_pfn ? -EBUSY : 0;
688 	trace_test_pages_isolated(start_pfn, end_pfn, pfn);