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-rw-r--r--mm/vmscan.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index f69601d39a6d..397f89accdb6 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1886,7 +1886,12 @@ static unsigned noinline_for_stack move_pages_to_lru(struct lruvec *lruvec,
continue;
}
- lruvec = mem_cgroup_page_lruvec(page, pgdat);
+ /*
+ * All pages were isolated from the same lruvec (and isolation
+ * inhibits memcg migration).
+ */
+ VM_BUG_ON_PAGE(mem_cgroup_page_lruvec(page, page_pgdat(page))
+ != lruvec, page);
lru = page_lru(page);
nr_pages = thp_nr_pages(page);