diff --git a/criu/include/pagemap.h b/criu/include/pagemap.h
index db9fae53c..d0a28b9f1 100644
--- a/criu/include/pagemap.h
+++ b/criu/include/pagemap.h
@@ -112,6 +112,13 @@ int pagemap_enqueue_iovec(struct page_read *pr, void *buf,
 			      unsigned long len, struct list_head *to);
 int pagemap_render_iovec(struct list_head *from, struct task_restore_args *ta);
 
+/*
+ * Create a shallow copy of page_read object.
+ * The new object shares the pagemap structures with the original, but
+ * maintains its own set of references to those structures.
+ */
+extern void dup_page_read(struct page_read *src, struct page_read *dst);
+
 extern int dedup_one_iovec(struct page_read *pr, unsigned long base,
 			   unsigned long len);
 
diff --git a/criu/pagemap.c b/criu/pagemap.c
index cb83caa14..f4035042d 100644
--- a/criu/pagemap.c
+++ b/criu/pagemap.c
@@ -819,3 +819,16 @@ int open_page_read(int pid, struct page_read *pr, int pr_flags)
 {
 	return open_page_read_at(get_service_fd(IMG_FD_OFF), pid, pr, pr_flags);
 }
+
+
+#define DUP_IDS_BASE 1000
+
+void dup_page_read(struct page_read *src, struct page_read *dst)
+{
+	static int dup_ids = 1;
+
+	memcpy(dst, src, sizeof(*dst));
+	INIT_LIST_HEAD(&dst->async);
+	dst->id = src->id + DUP_IDS_BASE * dup_ids++;
+	dst->reset(dst);
+}