diff mbox series

[v6,45/51] mm: Support tail pages in wait_for_stable_page

Message ID 20200610201345.13273-46-willy@infradead.org (mailing list archive)
State New, archived
Headers show
Series Large pages in the page cache | expand

Commit Message

Matthew Wilcox June 10, 2020, 8:13 p.m. UTC 
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>

page->mapping is undefined for tail pages, so operate exclusively on
the head page.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 mm/page-writeback.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 28b3e7a67565..1b358aac065f 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2851,6 +2851,7 @@  EXPORT_SYMBOL_GPL(wait_on_page_writeback);
  */
 void wait_for_stable_page(struct page *page)
 {
+	page = thp_head(page);
 	if (bdi_cap_stable_pages_required(inode_to_bdi(page->mapping->host)))
 		wait_on_page_writeback(page);
 }