diff --git a/0051-update-memdcd-engine-for-userswap.patch b/0051-update-memdcd-engine-for-userswap.patch
new file mode 100644
index 0000000..6a8b593
--- /dev/null
+++ b/0051-update-memdcd-engine-for-userswap.patch
@@ -0,0 +1,99 @@
+From 6b25858292a295ab928cd8bfb89715ecee2e600b Mon Sep 17 00:00:00 2001
+From: yangxin <245051644@qq.com>
+Date: Wed, 15 Dec 2021 10:19:43 +0000
+Subject: [PATCH] update memdcd engine for userswap
+
+Filter out vmas without userswap flags in the memdcd engine.
+
+Signed-off-by: YangXin <245051644@qq.com>
+---
+ etmem/src/etmemd_src/etmemd_memdcd.c | 54 ++++++++++++++++++++++++++--
+ 1 file changed, 51 insertions(+), 3 deletions(-)
+
+diff --git a/etmem/src/etmemd_src/etmemd_memdcd.c b/etmem/src/etmemd_src/etmemd_memdcd.c
+index 635e5a2..28590e2 100644
+--- a/etmem/src/etmemd_src/etmemd_memdcd.c
++++ b/etmem/src/etmemd_src/etmemd_memdcd.c
+@@ -235,6 +235,54 @@ FREE_SWAP:
+     return ret;
+ }
+ 
++static struct page_refs *memdcd_do_scan(const struct task_pid *tpid, const struct task *tk)
++{
++    int i = 0;
++    struct vmas *vmas = NULL;
++    struct page_refs *page_refs = NULL;
++    int ret = 0;
++    char pid[PID_STR_MAX_LEN] = {0};
++    char *us = "us";
++
++    if(tpid == NULL) {
++        etmemd_log(ETMEMD_LOG_ERR, "task pid is null\n");
++        return NULL;
++    }
++
++    if (tk == NULL) {
++        etmemd_log(ETMEMD_LOG_ERR, "task struct is null for pid %u\n", tpid->pid);
++        return NULL;
++    }
++
++    if (snprintf_s(pid, PID_STR_MAX_LEN, PID_STR_MAX_LEN - 1, "%u", tpid->pid) <= 0) {
++        etmemd_log(ETMEMD_LOG_ERR, "snprintf pid fail %u", tpid->pid);
++        return NULL;
++    }
++    /* get vmas of target pid first. */
++    vmas = get_vmas_with_flags(pid, &us, 1, true);
++    if (vmas == NULL) {
++        etmemd_log(ETMEMD_LOG_ERR, "get vmas for %s fail\n", pid);
++        return NULL;
++    }
++
++    /* loop for scanning idle_pages to get result of memory access. */
++    for (i = 0; i < tk->eng->proj->loop; i++) {
++        ret = get_page_refs(vmas, pid, &page_refs, NULL, 0);
++        if (ret != 0) {
++            etmemd_log(ETMEMD_LOG_ERR, "scan operation failed\n");
++            /* free page_refs nodes already exist */
++            etmemd_free_page_refs(page_refs);
++            page_refs = NULL;
++            break;
++        }
++        sleep((unsigned)tk->eng->proj->sleep);
++    }
++
++    free_vmas(vmas);
++
++    return page_refs;
++}
++
+ static void *memdcd_executor(void *arg)
+ {
+     struct task_pid *tk_pid = (struct task_pid *)arg;
+@@ -244,7 +292,7 @@ static void *memdcd_executor(void *arg)
+     /* register cleanup function in case of unexpected cancellation detected,
+      * and register for memory_grade first, because it needs to clean after page_refs is cleaned */
+     pthread_cleanup_push(clean_page_refs_unexpected, &page_refs);
+-    page_refs = etmemd_do_scan(tk_pid, tk_pid->tk);
++    page_refs = memdcd_do_scan(tk_pid, tk_pid->tk);
+     if (page_refs != NULL) {
+         if (memdcd_do_migrate(tk_pid->pid, page_refs, memdcd_params->memdcd_socket) != 0) {
+             etmemd_log(ETMEMD_LOG_WARN, "memdcd migrate for pid %u fail\n", tk_pid->pid);
+@@ -290,13 +338,13 @@ static struct config_item g_memdcd_task_config_items[] = {
+ static int memdcd_fill_task(GKeyFile *config, struct task *tk)
+ {
+     struct memdcd_params *params = calloc(1, sizeof(struct memdcd_params));
+-    memset_s(params->memdcd_socket, MAX_SOCK_PATH_LENGTH, 0, MAX_SOCK_PATH_LENGTH);
+-
+     if (params == NULL) {
+         etmemd_log(ETMEMD_LOG_ERR, "alloc memdcd param fail\n");
+         return -1;
+     }
+ 
++    memset_s(params->memdcd_socket, MAX_SOCK_PATH_LENGTH, 0, MAX_SOCK_PATH_LENGTH);
++
+     if (parse_file_config(config, TASK_GROUP, g_memdcd_task_config_items, ARRAY_SIZE(g_memdcd_task_config_items),
+                           (void *)params) != 0) {
+         etmemd_log(ETMEMD_LOG_ERR, "memdcd fill task fail\n");
+-- 
+2.27.0
+
diff --git a/etmem.spec b/etmem.spec
index f958e52..ee1a54c 100644
--- a/etmem.spec
+++ b/etmem.spec
@@ -2,7 +2,7 @@
 
 Name:	       etmem
 Version:       1.0
-Release:       9
+Release:       10
 Summary:       etmem 
 License:       Mulan PSL v2
 URL:           https://gitee.com/openeuler/etmem
@@ -58,6 +58,7 @@ Patch46: 0047-move-all-the-files-to-sub-directory-of-etmem.patch
 Patch47: 0048-Commit-new-features-memRouter-and-userswap-to-etmem.patch
 Patch48: 0049-Add-engine-memdcd-to-etmemd.patch
 Patch49: 0050-Add-CMakeLists.txt-for-three-features-of-etmem.patch
+Patch50: 0051-update-memdcd-engine-for-userswap.patch
 
 #Dependency
 BuildRequires: cmake gcc gcc-c++ glib2-devel
@@ -105,6 +106,9 @@ install -m 0644 userswap/include/uswap_api.h $RPM_BUILD_ROOT%{_includedir}
 %postun -p /sbin/ldconfig
 
 %changelog
+* Fri Dec 15 2021 YangXin <245051644@qq.com> 1.0-10
+- Update memdcd engine for userswap page filter.
+
 * Fri Oct 29 2021 liubo <liubo254@huawei.com> 1.0-9
 - Add missing URL and source to etmem.spec