1 files changed, 4 insertions, 0 deletions

diff --git a/mm/memory.c b/mm/memory.c
index aed45eaf8ac9..09e4b1be7b67 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2555,6 +2555,10 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
                 ret = VM_FAULT_MAJOR;
                 count_vm_event(PGMAJFAULT);
         } else if (PageHWPoison(page)) {
+                /*
+                 * hwpoisoned dirty swapcache pages are kept for killing
+                 * owner processes (which may be unknown at hwpoison time)
+                 */
                 ret = VM_FAULT_HWPOISON;
                 delayacct_clear_flag(DELAYACCT_PF_SWAPIN);
                 goto out_release;