[PATCH] dbg: Call split_swap_clsuter() before unlock page during split THP

[Huang Ying]

---
 mm/huge_memory.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index faadc449cca5..8d79e5e6b46e 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2444,6 +2444,12 @@ static void __split_huge_page(struct page *page, struct list_head *list,
 
 	remap_page(head);
 
+	if (PageSwapCache(head)) {
+		swp_entry_t entry = { .val = page_private(head) };
+
+		split_swap_cluster(entry);
+	}
+
 	for (i = 0; i < HPAGE_PMD_NR; i++) {
 		struct page *subpage = head + i;
 		if (subpage == page)
@@ -2678,12 +2684,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
 		}
 
 		__split_huge_page(page, list, end, flags);
-		if (PageSwapCache(head)) {
-			swp_entry_t entry = { .val = page_private(head) };
-
-			ret = split_swap_cluster(entry);
-		} else
-			ret = 0;
+		ret = 0;
 	} else {
 		if (IS_ENABLED(CONFIG_DEBUG_VM) && mapcount) {
 			pr_alert("total_mapcount: %u, page_count(): %u\n",
-- 
2.28.0