If a frontswap dup-store failed, it should invalidate the old page in
backend and return failure.
This patch add this missing handle. According to the comments of
__frontswap_store(), it should have been there.
Reported-by: changkun.li <xfishcoder@xxxxxxxxx>
Signed-off-by: Weijie Yang <weijie.yang@xxxxxxxxxxx>
---
mm/frontswap.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/mm/frontswap.c b/mm/frontswap.c
index df067f1..171c6c0 100644
--- a/mm/frontswap.c
+++ b/mm/frontswap.c
@@ -245,8 +245,10 @@ int __frontswap_store(struct page *page)
the (older) page from frontswap
*/
inc_frontswap_failed_stores();
- if (dup)
+ if (dup) {
__frontswap_clear(sis, offset);
+ frontswap_ops->invalidate_page(type, offset);
+ }
}
if (frontswap_writethrough_enabled)
/* report failure so swap also writes to swap device */
--
1.7.10.4
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