diff mbox series

[v3,1/4] mm/filemap: return early if failed to allocate memory for split

Message ID 20240415171857.19244-2-ryncsn@gmail.com (mailing list archive)
State New
Headers show
Series mm/filemap: optimize folio adding and splitting | expand

Commit Message

Kairui Song April 15, 2024, 5:18 p.m. UTC 
From: Kairui Song <kasong@tencent.com>

xas_split_alloc could fail with NOMEM, and in such case, it should abort
early instead of keep going and fail the xas_split below.

Signed-off-by: Kairui Song <kasong@tencent.com>
Acked-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 mm/filemap.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/mm/filemap.c b/mm/filemap.c
index 480ae6589803..12089c24abfb 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -880,9 +880,12 @@  noinline int __filemap_add_folio(struct address_space *mapping,
 		unsigned int order = xa_get_order(xas.xa, xas.xa_index);
 		void *entry, *old = NULL;
 
-		if (order > folio_order(folio))
+		if (order > folio_order(folio)) {
 			xas_split_alloc(&xas, xa_load(xas.xa, xas.xa_index),
 					order, gfp);
+			if (xas_error(&xas))
+				goto error;
+		}
 		xas_lock_irq(&xas);
 		xas_for_each_conflict(&xas, entry) {
 			old = entry;