Commit e20c41b1 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle)
Browse files

mm/vmscan: Turn page_check_dirty_writeback() into folio_check_dirty_writeback() 



Saves a few calls to compound_head().

Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
parent cbcc268b

mm/vmscan.c

+10 −10
Original line number Diff line number Diff line
@@ -1437,7 +1437,7 @@ static enum page_references page_check_references(struct page *page, 
}



/* Check if a page is dirty or under writeback */

static void page_check_dirty_writeback(struct page *page,

static void folio_check_dirty_writeback(struct folio *folio,

				       bool *dirty, bool *writeback)

{

	struct address_space *mapping;
@@ -1446,24 +1446,24 @@ static void page_check_dirty_writeback(struct page *page, 
	 * Anonymous pages are not handled by flushers and must be written

	 * from reclaim context. Do not stall reclaim based on them

	 */

	if (!page_is_file_lru(page) ||

	    (PageAnon(page) && !PageSwapBacked(page))) {

	if (!folio_is_file_lru(folio) ||

	    (folio_test_anon(folio) && !folio_test_swapbacked(folio))) {

		*dirty = false;

		*writeback = false;

		return;

	}



	/* By default assume that the page flags are accurate */

	*dirty = PageDirty(page);

	*writeback = PageWriteback(page);

	/* By default assume that the folio flags are accurate */

	*dirty = folio_test_dirty(folio);

	*writeback = folio_test_writeback(folio);



	/* Verify dirty/writeback state if the filesystem supports it */

	if (!page_has_private(page))

	if (!folio_test_private(folio))

		return;



	mapping = page_mapping(page);

	mapping = folio_mapping(folio);

	if (mapping && mapping->a_ops->is_dirty_writeback)

		mapping->a_ops->is_dirty_writeback(page, dirty, writeback);

		mapping->a_ops->is_dirty_writeback(&folio->page, dirty, writeback);

}



static struct page *alloc_demote_page(struct page *page, unsigned long node)
@@ -1572,7 +1572,7 @@ static unsigned int shrink_page_list(struct list_head *page_list, 
		 * reclaim_congested. kswapd will stall and start writing

		 * pages if the tail of the LRU is all dirty unqueued pages.

		 */

		page_check_dirty_writeback(page, &dirty, &writeback);

		folio_check_dirty_writeback(folio, &dirty, &writeback);

		if (dirty || writeback)

			stat->nr_dirty++;