shmem.c (8e205f779d1443a94b5ae81aa359cb535dd3021e) shmem.c (b1a366500bd537b50c3aad26dc7df083ec03a448)
1/*
2 * Resizable virtual memory filesystem for Linux.
3 *
4 * Copyright (C) 2000 Linus Torvalds.
5 * 2000 Transmeta Corp.
6 * 2000-2001 Christoph Rohland
7 * 2000-2001 SAP AG
8 * 2002 Red Hat Inc.

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463 unlock_page(page);
464 page_cache_release(page);
465 }
466 }
467 if (start >= end)
468 return;
469
470 index = start;
1/*
2 * Resizable virtual memory filesystem for Linux.
3 *
4 * Copyright (C) 2000 Linus Torvalds.
5 * 2000 Transmeta Corp.
6 * 2000-2001 Christoph Rohland
7 * 2000-2001 SAP AG
8 * 2002 Red Hat Inc.

--- 454 unchanged lines hidden (view full) ---

463 unlock_page(page);
464 page_cache_release(page);
465 }
466 }
467 if (start >= end)
468 return;
469
470 index = start;
471 for ( ; ; ) {
471 while (index < end) {
472 cond_resched();
473
474 pvec.nr = find_get_entries(mapping, index,
475 min(end - index, (pgoff_t)PAGEVEC_SIZE),
476 pvec.pages, indices);
477 if (!pvec.nr) {
472 cond_resched();
473
474 pvec.nr = find_get_entries(mapping, index,
475 min(end - index, (pgoff_t)PAGEVEC_SIZE),
476 pvec.pages, indices);
477 if (!pvec.nr) {
478 if (index == start || unfalloc)
478 /* If all gone or hole-punch or unfalloc, we're done */
479 if (index == start || end != -1)
479 break;
480 break;
481 /* But if truncating, restart to make sure all gone */
480 index = start;
481 continue;
482 }
482 index = start;
483 continue;
484 }
483 if ((index == start || unfalloc) && indices[0] >= end) {
484 pagevec_remove_exceptionals(&pvec);
485 pagevec_release(&pvec);
486 break;
487 }
488 mem_cgroup_uncharge_start();
489 for (i = 0; i < pagevec_count(&pvec); i++) {
490 struct page *page = pvec.pages[i];
491
492 index = indices[i];
493 if (index >= end)
494 break;
495
496 if (radix_tree_exceptional_entry(page)) {
497 if (unfalloc)
498 continue;
485 mem_cgroup_uncharge_start();
486 for (i = 0; i < pagevec_count(&pvec); i++) {
487 struct page *page = pvec.pages[i];
488
489 index = indices[i];
490 if (index >= end)
491 break;
492
493 if (radix_tree_exceptional_entry(page)) {
494 if (unfalloc)
495 continue;
499 nr_swaps_freed += !shmem_free_swap(mapping,
500 index, page);
496 if (shmem_free_swap(mapping, index, page)) {
497 /* Swap was replaced by page: retry */
498 index--;
499 break;
500 }
501 nr_swaps_freed++;
501 continue;
502 }
503
504 lock_page(page);
505 if (!unfalloc || !PageUptodate(page)) {
506 if (page->mapping == mapping) {
507 VM_BUG_ON_PAGE(PageWriteback(page), page);
508 truncate_inode_page(mapping, page);
502 continue;
503 }
504
505 lock_page(page);
506 if (!unfalloc || !PageUptodate(page)) {
507 if (page->mapping == mapping) {
508 VM_BUG_ON_PAGE(PageWriteback(page), page);
509 truncate_inode_page(mapping, page);
510 } else {
511 /* Page was replaced by swap: retry */
512 unlock_page(page);
513 index--;
514 break;
509 }
510 }
511 unlock_page(page);
512 }
513 pagevec_remove_exceptionals(&pvec);
514 pagevec_release(&pvec);
515 mem_cgroup_uncharge_end();
516 index++;

--- 2530 unchanged lines hidden --- 		515 }
516 }
517 unlock_page(page);
518 }
519 pagevec_remove_exceptionals(&pvec);
520 pagevec_release(&pvec);
521 mem_cgroup_uncharge_end();
522 index++;

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