diff --git a/easy-fs-fuse/src/main.rs b/easy-fs-fuse/src/main.rs
index 7363136..4daab49 100644
--- a/easy-fs-fuse/src/main.rs
+++ b/easy-fs-fuse/src/main.rs
@@ -7,7 +7,7 @@ use std::sync::Mutex;
 
 /// Use a block size of 512 bytes
 const BLOCK_SZ: usize = 512;
-const BLOCK_NUM: usize = 16384;
+const BLOCK_NUM: usize = 131072; //64*2048
 
 /// Wrapper for turning a File into a BlockDevice
 struct BlockFile(Mutex<File>);
diff --git a/os1-ref/Cargo.toml b/os1-ref/Cargo.toml
index ef61cb9..ea874c4 100644
--- a/os1-ref/Cargo.toml
+++ b/os1-ref/Cargo.toml
@@ -8,3 +8,7 @@ edition = "2018"
 
 [dependencies]
 log = "0.4"
+
+[profile.release]
+debug = true
+opt-level = 0
\ No newline at end of file
diff --git a/os1-ref/Makefile b/os1-ref/Makefile
index 53e0591..5cc5762 100644
--- a/os1-ref/Makefile
+++ b/os1-ref/Makefile
@@ -46,4 +46,7 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -s -S
+
 .PHONY: build env kernel clean run-inner
diff --git a/os1/Cargo.toml b/os1/Cargo.toml
index ef61cb9..ea874c4 100644
--- a/os1/Cargo.toml
+++ b/os1/Cargo.toml
@@ -8,3 +8,7 @@ edition = "2018"
 
 [dependencies]
 log = "0.4"
+
+[profile.release]
+debug = true
+opt-level = 0
\ No newline at end of file
diff --git a/os1/Makefile b/os1/Makefile
index e3c1ded..1094bbd 100644
--- a/os1/Makefile
+++ b/os1/Makefile
@@ -46,4 +46,7 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -s -S
+
 .PHONY: build env kernel clean run-inner
diff --git a/os2-ref/Cargo.toml b/os2-ref/Cargo.toml
index a122ae6..8a2e182 100644
--- a/os2-ref/Cargo.toml
+++ b/os2-ref/Cargo.toml
@@ -10,3 +10,7 @@ edition = "2018"
 lazy_static = { version = "1.4.0", features = ["spin_no_std"] }
 log = "0.4"
 riscv = { git = "https://github.com/rcore-os/riscv", features = ["inline-asm"] }
+
+[profile.release]
+debug = true
+opt-level = 0
\ No newline at end of file
diff --git a/os2-ref/Makefile b/os2-ref/Makefile
index 59f3000..255aa89 100644
--- a/os2-ref/Makefile
+++ b/os2-ref/Makefile
@@ -55,4 +55,7 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -s -S
+
 .PHONY: build env kernel clean run-inner
diff --git a/os2-ref/src/batch.rs b/os2-ref/src/batch.rs
index 7f97793..67a8e18 100644
--- a/os2-ref/src/batch.rs
+++ b/os2-ref/src/batch.rs
@@ -3,7 +3,7 @@ use crate::trap::TrapContext;
 use lazy_static::*;
 
 const USER_STACK_SIZE: usize = 4096;
-const KERNEL_STACK_SIZE: usize = 4096 * 2;
+const KERNEL_STACK_SIZE: usize = 4096 * 20;
 const MAX_APP_NUM: usize = 16;
 const APP_BASE_ADDRESS: usize = 0x80400000;
 const APP_SIZE_LIMIT: usize = 0x20000;
diff --git a/os2/Cargo.toml b/os2/Cargo.toml
index a122ae6..8a2e182 100644
--- a/os2/Cargo.toml
+++ b/os2/Cargo.toml
@@ -10,3 +10,7 @@ edition = "2018"
 lazy_static = { version = "1.4.0", features = ["spin_no_std"] }
 log = "0.4"
 riscv = { git = "https://github.com/rcore-os/riscv", features = ["inline-asm"] }
+
+[profile.release]
+debug = true
+opt-level = 0
\ No newline at end of file
diff --git a/os2/Makefile b/os2/Makefile
index 7224b08..4e8eef1 100644
--- a/os2/Makefile
+++ b/os2/Makefile
@@ -55,4 +55,7 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -s -S
+
 .PHONY: build env kernel clean run-inner
diff --git a/os2/src/batch.rs b/os2/src/batch.rs
index 7f97793..67a8e18 100644
--- a/os2/src/batch.rs
+++ b/os2/src/batch.rs
@@ -3,7 +3,7 @@ use crate::trap::TrapContext;
 use lazy_static::*;
 
 const USER_STACK_SIZE: usize = 4096;
-const KERNEL_STACK_SIZE: usize = 4096 * 2;
+const KERNEL_STACK_SIZE: usize = 4096 * 20;
 const MAX_APP_NUM: usize = 16;
 const APP_BASE_ADDRESS: usize = 0x80400000;
 const APP_SIZE_LIMIT: usize = 0x20000;
diff --git a/os3-ref/Cargo.toml b/os3-ref/Cargo.toml
index a79093c..7d9d980 100644
--- a/os3-ref/Cargo.toml
+++ b/os3-ref/Cargo.toml
@@ -11,3 +11,7 @@ buddy_system_allocator = "0.6"
 lazy_static = { version = "1.4.0", features = ["spin_no_std"] }
 log = "0.4"
 riscv = { git = "https://github.com/rcore-os/riscv", features = ["inline-asm"] }
+
+[profile.release]
+debug = true
+opt-level = 0
\ No newline at end of file
diff --git a/os3-ref/Makefile b/os3-ref/Makefile
index f68b3ee..f85edc8 100644
--- a/os3-ref/Makefile
+++ b/os3-ref/Makefile
@@ -56,4 +56,7 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -s -S
+
 .PHONY: build env kernel clean run-inner
diff --git a/os3-ref/src/config.rs b/os3-ref/src/config.rs
index 45c0907..eec1dd0 100644
--- a/os3-ref/src/config.rs
+++ b/os3-ref/src/config.rs
@@ -1,7 +1,7 @@
 //! Constants used in rCore
 
 pub const USER_STACK_SIZE: usize = 4096;
-pub const KERNEL_STACK_SIZE: usize = 4096 * 2;
+pub const KERNEL_STACK_SIZE: usize = 4096 * 20;
 pub const KERNEL_HEAP_SIZE: usize = 0x20000;
 pub const MAX_APP_NUM: usize = 16;
 pub const APP_BASE_ADDRESS: usize = 0x80400000;
diff --git a/os3/Cargo.toml b/os3/Cargo.toml
index a79093c..7d9d980 100644
--- a/os3/Cargo.toml
+++ b/os3/Cargo.toml
@@ -11,3 +11,7 @@ buddy_system_allocator = "0.6"
 lazy_static = { version = "1.4.0", features = ["spin_no_std"] }
 log = "0.4"
 riscv = { git = "https://github.com/rcore-os/riscv", features = ["inline-asm"] }
+
+[profile.release]
+debug = true
+opt-level = 0
\ No newline at end of file
diff --git a/os3/Makefile b/os3/Makefile
index 1aefac3..68d2b4f 100644
--- a/os3/Makefile
+++ b/os3/Makefile
@@ -56,4 +56,7 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -s -S
+
 .PHONY: build env kernel clean run-inner
diff --git a/os3/src/config.rs b/os3/src/config.rs
index 135382e..70cb487 100644
--- a/os3/src/config.rs
+++ b/os3/src/config.rs
@@ -1,5 +1,5 @@
 pub const USER_STACK_SIZE: usize = 8192;
-pub const KERNEL_STACK_SIZE: usize = 8192 * 2;
+pub const KERNEL_STACK_SIZE: usize = 8192 * 20;
 pub const KERNEL_HEAP_SIZE: usize = 0x20000;
 pub const MAX_APP_NUM: usize = 16;
 pub const APP_BASE_ADDRESS: usize = 0x80400000;
diff --git a/os4-ref/Cargo.toml b/os4-ref/Cargo.toml
index 0e54c72..cb79bb1 100644
--- a/os4-ref/Cargo.toml
+++ b/os4-ref/Cargo.toml
@@ -15,3 +15,7 @@ riscv = { git = "https://github.com/rcore-os/riscv", features = ["inline-asm"] }
 spin = "0.9"
 lock_api = "=0.4.6"
 xmas-elf = "0.7.0"
+
+[profile.release]
+debug = true
+opt-level = 0
\ No newline at end of file
diff --git a/os4-ref/Makefile b/os4-ref/Makefile
index bc3f19b..cb4668c 100644
--- a/os4-ref/Makefile
+++ b/os4-ref/Makefile
@@ -56,4 +56,7 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -s -S
+
 .PHONY: build env kernel clean run-inner
\ No newline at end of file
diff --git a/os4-ref/src/config.rs b/os4-ref/src/config.rs
index 89696b3..1327189 100644
--- a/os4-ref/src/config.rs
+++ b/os4-ref/src/config.rs
@@ -1,7 +1,7 @@
 //! Constants used in rCore
 
 pub const USER_STACK_SIZE: usize = 4096 * 2;
-pub const KERNEL_STACK_SIZE: usize = 4096 * 2;
+pub const KERNEL_STACK_SIZE: usize = 4096 * 20;
 pub const KERNEL_HEAP_SIZE: usize = 0x30_0000;
 pub const MEMORY_END: usize = 0x80800000;
 pub const PAGE_SIZE: usize = 0x1000;
diff --git a/os4/Cargo.toml b/os4/Cargo.toml
index 0e54c72..cb79bb1 100644
--- a/os4/Cargo.toml
+++ b/os4/Cargo.toml
@@ -15,3 +15,7 @@ riscv = { git = "https://github.com/rcore-os/riscv", features = ["inline-asm"] }
 spin = "0.9"
 lock_api = "=0.4.6"
 xmas-elf = "0.7.0"
+
+[profile.release]
+debug = true
+opt-level = 0
\ No newline at end of file
diff --git a/os4/Makefile b/os4/Makefile
index 1380f3f..7af0b07 100644
--- a/os4/Makefile
+++ b/os4/Makefile
@@ -51,4 +51,7 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -s -S
+
 .PHONY: build env kernel clean run-inner
diff --git a/os4/src/config.rs b/os4/src/config.rs
index 3fe8084..81553ba 100644
--- a/os4/src/config.rs
+++ b/os4/src/config.rs
@@ -1,5 +1,5 @@
 pub const USER_STACK_SIZE: usize = 4096 * 2;
-pub const KERNEL_STACK_SIZE: usize = 4096 * 2;
+pub const KERNEL_STACK_SIZE: usize = 4096 * 20;
 pub const KERNEL_HEAP_SIZE: usize = 0x30_0000;
 pub const MEMORY_END: usize = 0x88000000;
 pub const PAGE_SIZE: usize = 0x1000;
diff --git a/os5-ref/Cargo.toml b/os5-ref/Cargo.toml
index 0e54c72..cb79bb1 100644
--- a/os5-ref/Cargo.toml
+++ b/os5-ref/Cargo.toml
@@ -15,3 +15,7 @@ riscv = { git = "https://github.com/rcore-os/riscv", features = ["inline-asm"] }
 spin = "0.9"
 lock_api = "=0.4.6"
 xmas-elf = "0.7.0"
+
+[profile.release]
+debug = true
+opt-level = 0
\ No newline at end of file
diff --git a/os5-ref/Makefile b/os5-ref/Makefile
index 0fd7fbe..b0f391c 100644
--- a/os5-ref/Makefile
+++ b/os5-ref/Makefile
@@ -52,4 +52,7 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -s -S
+
 .PHONY: build env kernel clean run-inner
\ No newline at end of file
diff --git a/os5-ref/src/config.rs b/os5-ref/src/config.rs
index e2dcc10..d85290a 100644
--- a/os5-ref/src/config.rs
+++ b/os5-ref/src/config.rs
@@ -1,7 +1,7 @@
 //! Constants used in rCore
 
 pub const USER_STACK_SIZE: usize = 4096 * 2;
-pub const KERNEL_STACK_SIZE: usize = 4096 * 2;
+pub const KERNEL_STACK_SIZE: usize = 4096 * 20;
 pub const KERNEL_HEAP_SIZE: usize = 0x20_0000;
 pub const MEMORY_END: usize = 0x88000000;
 pub const PAGE_SIZE: usize = 0x1000;
diff --git a/os5/Cargo.toml b/os5/Cargo.toml
index 8c7b4e2..e40fbcf 100644
--- a/os5/Cargo.toml
+++ b/os5/Cargo.toml
@@ -15,3 +15,7 @@ riscv = { git = "https://github.com/rcore-os/riscv", features = ["inline-asm"] }
 spin = "0.9"
 xmas-elf = "0.7.0"
 lock_api = "=0.4.6"
+
+[profile.release]
+debug = true
+opt-level = 0
\ No newline at end of file
diff --git a/os5/Makefile b/os5/Makefile
index 0fd7fbe..b0f391c 100644
--- a/os5/Makefile
+++ b/os5/Makefile
@@ -52,4 +52,7 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -s -S
+
 .PHONY: build env kernel clean run-inner
\ No newline at end of file
diff --git a/os5/src/config.rs b/os5/src/config.rs
index a91541d..e4da309 100644
--- a/os5/src/config.rs
+++ b/os5/src/config.rs
@@ -1,5 +1,5 @@
 pub const USER_STACK_SIZE: usize = 4096 * 2;
-pub const KERNEL_STACK_SIZE: usize = 4096 * 2;
+pub const KERNEL_STACK_SIZE: usize = 4096 * 20;
 pub const KERNEL_HEAP_SIZE: usize = 0x30_0000;
 pub const MEMORY_END: usize = 0x88000000;
 pub const PAGE_SIZE: usize = 0x1000;
diff --git a/os6-ref/Cargo.toml b/os6-ref/Cargo.toml
index d38a1e0..4dcee45 100644
--- a/os6-ref/Cargo.toml
+++ b/os6-ref/Cargo.toml
@@ -16,3 +16,7 @@ lock_api = "=0.4.6"
 xmas-elf = "0.7.0"
 virtio-drivers = { git = "https://github.com/rcore-os/virtio-drivers" }
 easy-fs = { path = "../easy-fs" }
+
+[profile.release]
+debug = true
+opt-level = 0
\ No newline at end of file
diff --git a/os6-ref/Makefile b/os6-ref/Makefile
index 98e8087..39b8a79 100644
--- a/os6-ref/Makefile
+++ b/os6-ref/Makefile
@@ -61,4 +61,11 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -drive file=$(FS_IMG),if=none,format=raw,id=x0 -device virtio-blk-device,drive=x0,bus=virtio-mmio-bus.0 -s -S
+
 .PHONY: build env kernel clean fs-img
+
+[profile.release]
+debug = true
+opt-level = 0
\ No newline at end of file
diff --git a/os6-ref/src/config.rs b/os6-ref/src/config.rs
index 851df0a..74432df 100644
--- a/os6-ref/src/config.rs
+++ b/os6-ref/src/config.rs
@@ -1,7 +1,7 @@
 //! Constants used in rCore
 
 pub const USER_STACK_SIZE: usize = 4096 * 2;
-pub const KERNEL_STACK_SIZE: usize = 4096 * 2;
+pub const KERNEL_STACK_SIZE: usize = 4096 * 20;
 pub const KERNEL_HEAP_SIZE: usize = 0x20_0000;
 pub const MEMORY_END: usize = 0x88000000;
 pub const PAGE_SIZE: usize = 0x1000;
diff --git a/os6/Cargo.toml b/os6/Cargo.toml
index d38a1e0..4dcee45 100644
--- a/os6/Cargo.toml
+++ b/os6/Cargo.toml
@@ -16,3 +16,7 @@ lock_api = "=0.4.6"
 xmas-elf = "0.7.0"
 virtio-drivers = { git = "https://github.com/rcore-os/virtio-drivers" }
 easy-fs = { path = "../easy-fs" }
+
+[profile.release]
+debug = true
+opt-level = 0
\ No newline at end of file
diff --git a/os6/Makefile b/os6/Makefile
index 98e8087..7e27aa1 100644
--- a/os6/Makefile
+++ b/os6/Makefile
@@ -61,4 +61,7 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -drive file=$(FS_IMG),if=none,format=raw,id=x0 -device virtio-blk-device,drive=x0,bus=virtio-mmio-bus.0 -s -S
+
 .PHONY: build env kernel clean fs-img
diff --git a/os6/src/config.rs b/os6/src/config.rs
index 851df0a..74432df 100644
--- a/os6/src/config.rs
+++ b/os6/src/config.rs
@@ -1,7 +1,7 @@
 //! Constants used in rCore
 
 pub const USER_STACK_SIZE: usize = 4096 * 2;
-pub const KERNEL_STACK_SIZE: usize = 4096 * 2;
+pub const KERNEL_STACK_SIZE: usize = 4096 * 20;
 pub const KERNEL_HEAP_SIZE: usize = 0x20_0000;
 pub const MEMORY_END: usize = 0x88000000;
 pub const PAGE_SIZE: usize = 0x1000;
diff --git a/os7-ref/Cargo.toml b/os7-ref/Cargo.toml
index d38a1e0..4dcee45 100644
--- a/os7-ref/Cargo.toml
+++ b/os7-ref/Cargo.toml
@@ -16,3 +16,7 @@ lock_api = "=0.4.6"
 xmas-elf = "0.7.0"
 virtio-drivers = { git = "https://github.com/rcore-os/virtio-drivers" }
 easy-fs = { path = "../easy-fs" }
+
+[profile.release]
+debug = true
+opt-level = 0
\ No newline at end of file
diff --git a/os7-ref/Makefile b/os7-ref/Makefile
index facaf77..7c4723e 100644
--- a/os7-ref/Makefile
+++ b/os7-ref/Makefile
@@ -61,4 +61,7 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -drive file=$(FS_IMG),if=none,format=raw,id=x0 -device virtio-blk-device,drive=x0,bus=virtio-mmio-bus.0 -s -S
+
 .PHONY: build env kernel clean fs-img
diff --git a/os7-ref/src/config.rs b/os7-ref/src/config.rs
index 851df0a..74432df 100644
--- a/os7-ref/src/config.rs
+++ b/os7-ref/src/config.rs
@@ -1,7 +1,7 @@
 //! Constants used in rCore
 
 pub const USER_STACK_SIZE: usize = 4096 * 2;
-pub const KERNEL_STACK_SIZE: usize = 4096 * 2;
+pub const KERNEL_STACK_SIZE: usize = 4096 * 20;
 pub const KERNEL_HEAP_SIZE: usize = 0x20_0000;
 pub const MEMORY_END: usize = 0x88000000;
 pub const PAGE_SIZE: usize = 0x1000;
diff --git a/os7/Cargo.toml b/os7/Cargo.toml
index d38a1e0..4dcee45 100644
--- a/os7/Cargo.toml
+++ b/os7/Cargo.toml
@@ -16,3 +16,7 @@ lock_api = "=0.4.6"
 xmas-elf = "0.7.0"
 virtio-drivers = { git = "https://github.com/rcore-os/virtio-drivers" }
 easy-fs = { path = "../easy-fs" }
+
+[profile.release]
+debug = true
+opt-level = 0
\ No newline at end of file
diff --git a/os7/Makefile b/os7/Makefile
index facaf77..7c4723e 100644
--- a/os7/Makefile
+++ b/os7/Makefile
@@ -61,4 +61,7 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -drive file=$(FS_IMG),if=none,format=raw,id=x0 -device virtio-blk-device,drive=x0,bus=virtio-mmio-bus.0 -s -S
+
 .PHONY: build env kernel clean fs-img
diff --git a/os7/src/config.rs b/os7/src/config.rs
index 851df0a..74432df 100644
--- a/os7/src/config.rs
+++ b/os7/src/config.rs
@@ -1,7 +1,7 @@
 //! Constants used in rCore
 
 pub const USER_STACK_SIZE: usize = 4096 * 2;
-pub const KERNEL_STACK_SIZE: usize = 4096 * 2;
+pub const KERNEL_STACK_SIZE: usize = 4096 * 20;
 pub const KERNEL_HEAP_SIZE: usize = 0x20_0000;
 pub const MEMORY_END: usize = 0x88000000;
 pub const PAGE_SIZE: usize = 0x1000;
diff --git a/os8-ref/Cargo.toml b/os8-ref/Cargo.toml
index d38a1e0..36e0e64 100644
--- a/os8-ref/Cargo.toml
+++ b/os8-ref/Cargo.toml
@@ -16,3 +16,8 @@ lock_api = "=0.4.6"
 xmas-elf = "0.7.0"
 virtio-drivers = { git = "https://github.com/rcore-os/virtio-drivers" }
 easy-fs = { path = "../easy-fs" }
+
+[profile.release]
+debug = true
+opt-level = 0
+# opt-level = "s"
\ No newline at end of file
diff --git a/os8-ref/Makefile b/os8-ref/Makefile
index 7c3c6eb..c6b63f2 100644
--- a/os8-ref/Makefile
+++ b/os8-ref/Makefile
@@ -61,4 +61,7 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -drive file=$(FS_IMG),if=none,format=raw,id=x0 -device virtio-blk-device,drive=x0,bus=virtio-mmio-bus.0 -s -S
+
 .PHONY: build env kernel clean fs-img
diff --git a/os8-ref/src/config.rs b/os8-ref/src/config.rs
index 8562cd6..cc5222a 100644
--- a/os8-ref/src/config.rs
+++ b/os8-ref/src/config.rs
@@ -1,7 +1,7 @@
 //! Constants used in rCore
 
 pub const USER_STACK_SIZE: usize = 4096 * 2;
-pub const KERNEL_STACK_SIZE: usize = 4096 * 2;
+pub const KERNEL_STACK_SIZE: usize = 4096 * 20;
 pub const KERNEL_HEAP_SIZE: usize = 0x30_0000;
 pub const MEMORY_END: usize = 0x88000000;
 pub const PAGE_SIZE: usize = 0x1000;
diff --git a/os8/Cargo.toml b/os8/Cargo.toml
index d38a1e0..4dcee45 100644
--- a/os8/Cargo.toml
+++ b/os8/Cargo.toml
@@ -16,3 +16,7 @@ lock_api = "=0.4.6"
 xmas-elf = "0.7.0"
 virtio-drivers = { git = "https://github.com/rcore-os/virtio-drivers" }
 easy-fs = { path = "../easy-fs" }
+
+[profile.release]
+debug = true
+opt-level = 0
\ No newline at end of file
diff --git a/os8/Makefile b/os8/Makefile
index 7c3c6eb..c6b63f2 100644
--- a/os8/Makefile
+++ b/os8/Makefile
@@ -61,4 +61,7 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -drive file=$(FS_IMG),if=none,format=raw,id=x0 -device virtio-blk-device,drive=x0,bus=virtio-mmio-bus.0 -s -S
+
 .PHONY: build env kernel clean fs-img
diff --git a/os8/src/config.rs b/os8/src/config.rs
index 8562cd6..cc5222a 100644
--- a/os8/src/config.rs
+++ b/os8/src/config.rs
@@ -1,7 +1,7 @@
 //! Constants used in rCore
 
 pub const USER_STACK_SIZE: usize = 4096 * 2;
-pub const KERNEL_STACK_SIZE: usize = 4096 * 2;
+pub const KERNEL_STACK_SIZE: usize = 4096 * 20;
 pub const KERNEL_HEAP_SIZE: usize = 0x30_0000;
 pub const MEMORY_END: usize = 0x88000000;
 pub const PAGE_SIZE: usize = 0x1000;