diff --git a/deps/sefs b/deps/sefs
index a771d5d3..a87fbb19 160000
--- a/deps/sefs
+++ b/deps/sefs
@@ -1 +1 @@
-Subproject commit a771d5d37f2a21b02ee579bab85dc8e551d924e0
+Subproject commit a87fbb19e621d78413e2ee2af38d97b086e329b4
diff --git a/src/libos/src/fs/dev_fs/dev_fd.rs b/src/libos/src/fs/dev_fs/dev_fd.rs
index 65a5d28b..963037fd 100644
--- a/src/libos/src/fs/dev_fs/dev_fd.rs
+++ b/src/libos/src/fs/dev_fs/dev_fd.rs
@@ -15,14 +15,6 @@ impl INode for DevFd {
         Err(vfs::FsError::PermError)
     }
 
-    fn poll(&self) -> vfs::Result<vfs::PollStatus> {
-        Ok(vfs::PollStatus {
-            read: true,
-            write: true,
-            error: false,
-        })
-    }
-
     fn metadata(&self) -> vfs::Result<Metadata> {
         Ok(Metadata {
             dev: 1,
diff --git a/src/libos/src/fs/dev_fs/dev_null.rs b/src/libos/src/fs/dev_fs/dev_null.rs
index aa81c72e..25a77303 100644
--- a/src/libos/src/fs/dev_fs/dev_null.rs
+++ b/src/libos/src/fs/dev_fs/dev_null.rs
@@ -12,14 +12,6 @@ impl INode for DevNull {
         Ok(buf.len())
     }
 
-    fn poll(&self) -> vfs::Result<vfs::PollStatus> {
-        Ok(vfs::PollStatus {
-            read: true,
-            write: true,
-            error: false,
-        })
-    }
-
     fn metadata(&self) -> vfs::Result<Metadata> {
         Ok(Metadata {
             dev: 1,
diff --git a/src/libos/src/fs/dev_fs/dev_sgx/mod.rs b/src/libos/src/fs/dev_fs/dev_sgx/mod.rs
index b1153f70..8aa99c6e 100644
--- a/src/libos/src/fs/dev_fs/dev_sgx/mod.rs
+++ b/src/libos/src/fs/dev_fs/dev_sgx/mod.rs
@@ -24,10 +24,6 @@ impl INode for DevSgx {
         Err(FsError::PermError)
     }
 
-    fn poll(&self) -> vfs::Result<vfs::PollStatus> {
-        Err(FsError::PermError)
-    }
-
     fn metadata(&self) -> vfs::Result<Metadata> {
         Ok(Metadata {
             dev: 1,
diff --git a/src/libos/src/fs/dev_fs/dev_shm.rs b/src/libos/src/fs/dev_fs/dev_shm.rs
index 8cfcd871..d32eec27 100644
--- a/src/libos/src/fs/dev_fs/dev_shm.rs
+++ b/src/libos/src/fs/dev_fs/dev_shm.rs
@@ -12,10 +12,6 @@ impl INode for DevShm {
         Err(vfs::FsError::NotFile)
     }
 
-    fn poll(&self) -> vfs::Result<vfs::PollStatus> {
-        Err(vfs::FsError::NotFile)
-    }
-
     fn metadata(&self) -> vfs::Result<Metadata> {
         Ok(Metadata {
             dev: 0,
diff --git a/src/libos/src/fs/dev_fs/dev_zero.rs b/src/libos/src/fs/dev_fs/dev_zero.rs
index 5f77c8f8..53605285 100644
--- a/src/libos/src/fs/dev_fs/dev_zero.rs
+++ b/src/libos/src/fs/dev_fs/dev_zero.rs
@@ -15,14 +15,6 @@ impl INode for DevZero {
         Ok(buf.len())
     }
 
-    fn poll(&self) -> vfs::Result<vfs::PollStatus> {
-        Ok(vfs::PollStatus {
-            read: true,
-            write: true,
-            error: false,
-        })
-    }
-
     fn metadata(&self) -> vfs::Result<Metadata> {
         Ok(Metadata {
             dev: 1,
diff --git a/src/libos/src/fs/hostfs.rs b/src/libos/src/fs/hostfs.rs
index 2da7c6ca..9da7ed97 100644
--- a/src/libos/src/fs/hostfs.rs
+++ b/src/libos/src/fs/hostfs.rs
@@ -98,20 +98,6 @@ impl INode for HNode {
         Ok(len)
     }
 
-    fn poll(&self) -> Result<PollStatus> {
-        if !self.is_file() {
-            return Err(FsError::NotFile);
-        }
-        let guard = self.open_file()?;
-        let file = guard.as_ref().unwrap();
-        let metadata = try_std!(file.metadata());
-        Ok(PollStatus {
-            read: true,
-            write: !metadata.permissions().readonly(),
-            error: false,
-        })
-    }
-
     fn metadata(&self) -> Result<Metadata> {
         let metadata = if self.is_file() {
             let guard = self.open_file()?;
diff --git a/src/libos/src/fs/procfs/proc_inode/dir.rs b/src/libos/src/fs/procfs/proc_inode/dir.rs
index 5b504e65..15913974 100644
--- a/src/libos/src/fs/procfs/proc_inode/dir.rs
+++ b/src/libos/src/fs/procfs/proc_inode/dir.rs
@@ -26,10 +26,6 @@ where
         Err(vfs::FsError::NotFile)
     }
 
-    fn poll(&self) -> vfs::Result<vfs::PollStatus> {
-        Err(vfs::FsError::NotFile)
-    }
-
     fn metadata(&self) -> vfs::Result<Metadata> {
         Ok(Metadata {
             dev: 0,
diff --git a/src/libos/src/fs/procfs/proc_inode/file.rs b/src/libos/src/fs/procfs/proc_inode/file.rs
index e2fab56c..dafffbf3 100644
--- a/src/libos/src/fs/procfs/proc_inode/file.rs
+++ b/src/libos/src/fs/procfs/proc_inode/file.rs
@@ -18,14 +18,6 @@ impl<T> INode for File<T>
 where
     T: ProcINode + Sync + Send + 'static,
 {
-    fn poll(&self) -> vfs::Result<vfs::PollStatus> {
-        Ok(vfs::PollStatus {
-            read: true,
-            write: false,
-            error: false,
-        })
-    }
-
     fn metadata(&self) -> vfs::Result<Metadata> {
         Ok(Metadata {
             dev: 0,
diff --git a/src/libos/src/fs/procfs/proc_inode/symlink.rs b/src/libos/src/fs/procfs/proc_inode/symlink.rs
index 7df91671..c252f87f 100644
--- a/src/libos/src/fs/procfs/proc_inode/symlink.rs
+++ b/src/libos/src/fs/procfs/proc_inode/symlink.rs
@@ -18,10 +18,6 @@ impl<T> INode for SymLink<T>
 where
     T: ProcINode + Sync + Send + 'static,
 {
-    fn poll(&self) -> vfs::Result<vfs::PollStatus> {
-        Err(vfs::FsError::NotFile)
-    }
-
     fn metadata(&self) -> vfs::Result<Metadata> {
         Ok(Metadata {
             dev: 0,