diff --git a/.vscode/settings.json b/.vscode/settings.json
index bf81ab53..6a406554 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -7,7 +7,7 @@
     // For Rust Analyzer plugin users:
     "rust-analyzer.cargo.target": "riscv64gc-unknown-none-elf",
     "rust-analyzer.checkOnSave.allTargets": false,
-    "rust-analyzer.cargo.features": [
-        "board_qemu"
-    ]
+    // "rust-analyzer.cargo.features": [
+    //     "board_qemu"
+    // ]
 }
\ No newline at end of file
diff --git a/easy-fs-fuse/Cargo.toml b/easy-fs-fuse/Cargo.toml
index 0527e9b8..5c5e68d5 100644
--- a/easy-fs-fuse/Cargo.toml
+++ b/easy-fs-fuse/Cargo.toml
@@ -11,6 +11,6 @@ clap = "2.33.3"
 easy-fs = { path = "../easy-fs" }
 rand = "0.8.0"
 
-[features]
-board_qemu = []
-board_k210 = []
\ No newline at end of file
+# [features]
+# board_qemu = []
+# board_k210 = []
\ No newline at end of file
diff --git a/user/Cargo.toml b/user/Cargo.toml
index 18634c3c..a609f4de 100644
--- a/user/Cargo.toml
+++ b/user/Cargo.toml
@@ -14,6 +14,6 @@ riscv = { git = "https://github.com/rcore-os/riscv", features = ["inline-asm"] }
 [profile.release]
 debug = true
 
-[features]
-board_qemu = []
-board_k210 = []
\ No newline at end of file
+# [features]
+# board_qemu = []
+# board_k210 = []
\ No newline at end of file
diff --git a/user/src/bin/sig_simple.rs b/user/src/bin/sig_simple.rs
index bc886e02..4f5b8809 100644
--- a/user/src/bin/sig_simple.rs
+++ b/user/src/bin/sig_simple.rs
@@ -3,7 +3,6 @@
 
 extern crate user_lib;
 
-// use user_lib::{sigaction, sigprocmask, SignalAction, SignalFlags, fork, exit, wait, kill, getpid, sleep, sigreturn};
 use user_lib::*;
 
 fn func() {
diff --git a/user/src/bin/sig_simple2.rs b/user/src/bin/sig_simple2.rs
index b3fe7eea..28f33bda 100644
--- a/user/src/bin/sig_simple2.rs
+++ b/user/src/bin/sig_simple2.rs
@@ -3,12 +3,6 @@
 
 extern crate user_lib;
 
-/*
-use user_lib::{
-    exit, fork, getpid, kill, sigaction, sigprocmask, sigreturn, sleep, waitpid, SignalAction,
-    SignalFlags,
-};
-*/
 use user_lib::*;
 
 fn func() {
diff --git a/user/src/bin/sig_tests.rs b/user/src/bin/sig_tests.rs
index ebcc21d7..09055fc0 100644
--- a/user/src/bin/sig_tests.rs
+++ b/user/src/bin/sig_tests.rs
@@ -3,7 +3,6 @@
 
 extern crate user_lib;
 
-// use user_lib::{sigaction, sigprocmask, SignalAction, SignalFlags, fork, exit, wait, kill, getpid, sleep, sigreturn};
 use user_lib::*;
 
 fn func() {