diff --git a/add-error-message-dispaly-while-open-file-failed.patch b/add-error-message-dispaly-while-open-file-failed.patch
new file mode 100644
index 0000000000000000000000000000000000000000..a54133c51a1568e49abd726204749cb08afe43b4
--- /dev/null
+++ b/add-error-message-dispaly-while-open-file-failed.patch
@@ -0,0 +1,53 @@
+From 07b2b5d7f7b2cbe83f33e59633a1232644290e89 Mon Sep 17 00:00:00 2001
+From: wangguochun <wangguochun@kylinos.cn>
+Date: Tue, 22 Mar 2022 15:14:12 +0800
+Subject: [PATCH] add error message dispaly while open file failed
+
+---
+ src/domain.c    | 2 ++
+ src/vcpu_stat.c | 2 ++
+ 2 files changed, 4 insertions(+)
+
+diff --git a/src/domain.c b/src/domain.c
+index 977cabe..694d550 100644
+--- a/src/domain.c
++++ b/src/domain.c
+@@ -15,6 +15,7 @@
+ #include <stdlib.h>
+ #include <string.h>
+ #include <dirent.h>
++#include <errno.h>
+ #include "domain.h"
+ #include "utils.h"
+ #include "proc.h"
+@@ -105,6 +106,7 @@ static int get_id_from_cgroup(pid_t pid)
+     }
+     fp = fopen(path, "r");
+     if (fp == NULL) {
++        printf("open file %s fail errno : %d reason : %s \n",path, errno, strerror(errno));
+         return id;
+     }
+     /* parse id from "cpuset:machine.slice/machine-qemu\x2d$id" */
+diff --git a/src/vcpu_stat.c b/src/vcpu_stat.c
+index 1578ec4..84733bd 100644
+--- a/src/vcpu_stat.c
++++ b/src/vcpu_stat.c
+@@ -12,6 +12,7 @@
+  ********************************************************************************/
+ #include <stdio.h>
+ #include <string.h>
++#include <errno.h>
+ #include "type.h"
+ #include "vcpu_stat.h"
+ #include "domain.h"
+@@ -95,6 +96,7 @@ int get_vcpu_list(struct domain_list *list)
+ 
+     fp = fopen(KVM_VCPU_STAT_PATH, "r");
+     if (!fp) {
++        printf("open file %s fail errno : %d reason : %s \n",KVM_VCPU_STAT_PATH, errno, strerror(errno));
+         return -1;
+     }
+     list->num = 0;
+-- 
+2.27.0
+
diff --git a/vmtop.spec b/vmtop.spec
index 098461953330ab12ec61dcddc1c6b4fada1967e3..c8603458968bfb3b28292de0deadad5f48e49e07 100644
--- a/vmtop.spec
+++ b/vmtop.spec
@@ -38,6 +38,7 @@ Patch0027: performance-change-memset-location.patch
 Patch0028: proc-del-unused-items-getting-from-proc-stat-refresh.patch
 Patch0029: proc-del-loop-sscanf-for-proc-pid-stat-file.patch
 Patch0030: utils-del-realpath-from-read_file.patch
+Patch0031: add-error-message-dispaly-while-open-file-failed.patch
 
 Requires: libvirt, ncurses
 
@@ -78,6 +79,9 @@ install -m 550 vmtop ${RPM_BUILD_ROOT}/usr/bin/%{name}
 %{_bindir}/vmtop
 
 %changelog
+* Tue Mar 22 2022 wangguochun <wangguochun@kylinos.cn>
+- add error message dispaly while open file failed
+
 * Tue Mar 16 2021 Huawei Technologies Co., Ltd <alex.chen@huawei.com>
 - vcpu_list: pre malloc vcpu list to improve performance
 - performance: del unnecessary memcpy and memset