diff --git a/criu/pagemap.c b/criu/pagemap.c
index 6bcd0d70e..05f6b82b8 100644
--- a/criu/pagemap.c
+++ b/criu/pagemap.c
@@ -86,11 +86,15 @@ int dedup_one_iovec(struct page_read *pr, unsigned long off, unsigned long len)
 
 		ret = pr->seek_pagemap(pr, off);
 		if (ret == 0) {
-			pr_warn("Missing %lx in parent pagemap\n", off);
-			if (off < pr->cvaddr && pr->cvaddr < iov_end)
+			if (off < pr->cvaddr && pr->cvaddr < iov_end) {
+				pr_debug("pr%lu-%u:No range %lx-%lx in pagemap\n",
+					 pr->img_id, pr->id, off, pr->cvaddr);
 				off = pr->cvaddr;
-			else
+			} else {
+				pr_debug("pr%lu-%u:No range %lx-%lx in pagemap\n",
+					 pr->img_id, pr->id, off, iov_end);
 				return 0;
+			}
 		}
 
 		if (!pr->pe)
@@ -105,7 +109,8 @@ int dedup_one_iovec(struct page_read *pr, unsigned long off, unsigned long len)
 		prp = pr->parent;
 		if (prp) {
 			/* recursively */
-			pr_debug("Go to next parent level\n");
+			pr_debug("pr%lu-%u:Go to next parent level\n",
+				 pr->img_id, pr->id);
 			len = min(piov_end, iov_end) - off;
 			ret = dedup_one_iovec(prp, off, len);
 			if (ret != 0)