diff --git a/core/sysmaster/src/main.rs b/core/sysmaster/src/main.rs
index f00b502839498d6519f87956b54fd2fb1c4eefeb..0bc6b9bf81ffbc94f20317e4ebe32da5d2ec1cc1 100644
--- a/core/sysmaster/src/main.rs
+++ b/core/sysmaster/src/main.rs
@@ -51,7 +51,6 @@ use nix::sys::signal::{self, SaFlags, SigAction, SigHandler, SigSet, Signal};
 use std::cell::RefCell;
 use std::convert::TryFrom;
 use std::env::{self};
-use std::fs;
 use std::os::unix::process::CommandExt;
 use std::path::Path;
 use std::process::{exit, Command};
@@ -347,13 +346,19 @@ fn remount_sysroot() {
 
     let root_path = "/";
 
-    //check if the '/' has the write permission
-    if let Ok(md) = fs::metadata(root_path) {
-        let permissions = md.permissions();
-        if !permissions.readonly() {
-            return;
-        }
-    };
+    //check if the '/' file system has the write permission
+    use libc::{statvfs, ST_RDONLY};
+    use std::ffi::CString;
+
+    let c_path = CString::new(root_path).unwrap();
+
+    let mut statbuf: statvfs = unsafe { std::mem::zeroed() };
+
+    unsafe { statvfs(c_path.as_ptr(), &mut statbuf) };
+
+    if statbuf.f_flag & ST_RDONLY != 1 {
+        return;
+    }
 
     if let Ok(lines) = read_lines(FSTAB_PATH) {
         for item_raw in lines.flatten() {
diff --git a/core/sysmaster/src/mount/setup.rs b/core/sysmaster/src/mount/setup.rs
index 56efdac46bfa276cf57e4a26ce259232453a2dfa..f191070f535596853ef3a946ebfd9f26c33eddb7 100644
--- a/core/sysmaster/src/mount/setup.rs
+++ b/core/sysmaster/src/mount/setup.rs
@@ -31,7 +31,7 @@ use std::{
     path::{Path, PathBuf},
 };
 
-const EARLY_MOUNT_NUM: u8 = 3;
+const EARLY_MOUNT_NUM: u8 = 4;
 
 type Callback = fn() -> bool;
 
@@ -61,11 +61,38 @@ lazy_static! {
             source: String::from("devtmpfs"),
             target: String::from("/dev"),
             fs_type: String::from("devtmpfs"),
-            options: Some("mode=755,size=4m,nr_inodes=64K".to_string()),
+            options: Some("mode=755,size=4m,nr_inodes=1m".to_string()),
             flags: MsFlags::MS_NOSUID | MsFlags::MS_STRICTATIME,
             callback: None,
             mode: MountMode::MNT_FATAL | MountMode::MNT_IN_CONTAINER,
         },
+        MountPoint {
+            source: String::from("tmpfs"),
+            target: String::from("/run"),
+            fs_type: String::from("tmpfs"),
+            options: Some("mode=755,size=20%,nr_inodes=800K".to_string()),
+            flags: MsFlags::MS_NOSUID | MsFlags::MS_NODEV | MsFlags::MS_STRICTATIME,
+            callback: None,
+            mode: MountMode::MNT_FATAL | MountMode::MNT_IN_CONTAINER,
+        },
+        MountPoint {
+            source: String::from("devpts"),
+            target: String::from("/dev/pts"),
+            fs_type: String::from("devpts"),
+            options: Some("mode=620,gid=5".to_string()),
+            flags: MsFlags::MS_NOSUID | MsFlags::MS_NOEXEC,
+            callback: None,
+            mode: MountMode::MNT_IN_CONTAINER,
+        },
+        MountPoint {
+            source: String::from("tmpfs"),
+            target: String::from("/dev/shm"),
+            fs_type: String::from("tmpfs"),
+            options: Some("mode=1777".to_string()),
+            flags: MsFlags::MS_NOSUID | MsFlags::MS_NOEXEC | MsFlags::MS_STRICTATIME,
+            callback: None,
+            mode: MountMode::MNT_FATAL | MountMode::MNT_IN_CONTAINER,
+        },
         // table.push(MountPoint {
         //     source: String::from("securityfs"),
         //     target: String::from("/sys/kernel/security"),
@@ -387,9 +414,9 @@ pub fn mount_setup_early() -> Result<()> {
     Ok(())
 }
 
-/// mount the point of all the mount_table
+/// mount the point of all the mount_table except the early mount point
 pub fn mount_setup() -> Result<()> {
-    for table in MOUNT_TABLE.iter() {
+    for table in MOUNT_TABLE.iter().skip(EARLY_MOUNT_NUM as usize) {
         table.mount()?;
     }
 
diff --git a/init/mount.rs b/init/mount.rs
index 9aca221381ca73ab0d1810d69809ae58673873c9..b0842dbaf360a98711b72864fd9d25980bae396b 100644
--- a/init/mount.rs
+++ b/init/mount.rs
@@ -10,7 +10,7 @@
 // NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 // See the Mulan PSL v2 for more details.
 
-use nix::mount::MsFlags;
+use nix::mount::{self, MntFlags, MsFlags};
 use std::{fs, os::unix::fs::MetadataExt, path::Path};
 
 pub fn setup_mount_early() {
@@ -34,7 +34,7 @@ pub fn setup_mount_early() {
             "/dev",
             Some("devtmpfs"),
             MsFlags::MS_NOSUID | MsFlags::MS_STRICTATIME,
-            Some("mode=755,size=4m,nr_inodes=64K"),
+            Some("mode=755,size=4m,nr_inodes=1m"),
         ),
         (
             Some("tmpfs"),
@@ -54,12 +54,18 @@ pub fn setup_mount_early() {
             }
         }
 
-        if !is_mount_point(target) {
-            if let Err(e) = nix::mount::mount(source, target, fstype, flags, data) {
-                println!("Failed to mount {}: {}", target.display(), e);
+        if is_mount_point(target) {
+            // umount first as these filesystemd should be remount
+            if let Err(e) = mount::umount2(target, MntFlags::MNT_DETACH) {
+                println!("umount2 {} failed:{}", target.display(), e);
+                continue;
             }
         }
 
+        if let Err(e) = nix::mount::mount(source, target, fstype, flags, data) {
+            println!("Failed to mount {}: {}", target.display(), e);
+        }
+
         println!(
             "Mounting {:?} to {:?} of type {:?} with {:?}",
             source, target, fstype, flags