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-rw-r--r--mm/memcontrol.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 3b8c845e0c2e..bee6b1c9fdce 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4899,6 +4899,14 @@ retry:
switch (get_mctgt_type(vma, addr, ptent, &target)) {
case MC_TARGET_PAGE:
page = target.page;
+ /*
+ * We can have a part of the split pmd here. Moving it
+ * can be done but it would be too convoluted so simply
+ * ignore such a partial THP and keep it in original
+ * memcg. There should be somebody mapping the head.
+ */
+ if (PageTransCompound(page))
+ goto put;
if (isolate_lru_page(page))
goto put;
if (!mem_cgroup_move_account(page, false,