fix: 解决创建buddy的函数栈帧过大的问题 (#1189)

* fix: 解决创建buddy的函数栈帧过大的问题

Signed-off-by: longjin <longjin@DragonOS.org>

* chore(kernel): 移除smoltcp的log依赖项

Signed-off-by: longjin <longjin@DragonOS.org>

---------

Signed-off-by: longjin <longjin@DragonOS.org>

kernel/Cargo.lock

@@ -1543,7 +1543,6 @@ dependencies = [
  "cfg-if",
  "defmt",
  "heapless",
- "log",
  "managed",
 ]
 

kernel/Cargo.toml

@@ -49,7 +49,6 @@ num = { version = "=0.4.0", default-features = false }
 num-derive = "=0.3"
 num-traits = { git = "https://git.mirrors.dragonos.org.cn/DragonOS-Community/num-traits.git", rev = "1597c1c", default-features = false }
 smoltcp = { version = "=0.11.0", default-features = false, features = [
-    "log",
     "alloc",
     "socket-raw",
     "socket-udp",

kernel/src/arch/x86_64/smp/mod.rs

@@ -151,11 +151,16 @@ pub struct X86_64SmpManager {
 }
 
 impl X86_64SmpManager {
-    pub const fn new() -> Self {
+    /// 创建一个新的X86_64SmpManager实例
+    ///
+    /// 注：由于该函数只在编译时被调用，因此 `#[allow(clippy::large_stack_frames)]` 是安全的。
+    #[allow(clippy::large_stack_frames)]
+    const fn new() -> Self {
         return Self {
             ia64_cpu_to_sapicid: RwLock::new([None; PerCpu::MAX_CPU_NUM as usize]),
         };
     }
+
     /// initialize the logical cpu number to APIC ID mapping
     pub fn build_cpu_map(&self) -> Result<(), SystemError> {
         // 参考：https://code.dragonos.org.cn/xref/linux-6.1.9/arch/ia64/kernel/smpboot.c?fi=smp_build_cpu_map#496

kernel/src/mm/allocator/buddy.rs

@@ -77,11 +77,12 @@ impl<A: MemoryManagementArch> BuddyAllocator<A> {
         // 定义一个变量记录buddy表的大小
         (A::PAGE_SIZE - mem::size_of::<PageList<A>>()) / mem::size_of::<PhysAddr>();
 
+    #[inline(never)]
     pub unsafe fn new(mut bump_allocator: BumpAllocator<A>) -> Option<Self> {
         let initial_free_pages = bump_allocator.usage().free();
         let total_memory = bump_allocator.usage().total();
         debug!("Free pages before init buddy: {:?}", initial_free_pages);
-        debug!("Buddy entries: {}", Self::BUDDY_ENTRIES);
+        // debug!("Buddy entries: {}", Self::BUDDY_ENTRIES);
 
         let mut free_area: [PhysAddr; MAX_ORDER - MIN_ORDER] =
             [PhysAddr::new(0); MAX_ORDER - MIN_ORDER];
@@ -105,12 +106,12 @@ impl<A: MemoryManagementArch> BuddyAllocator<A> {
         };
 
         let mut total_pages_to_buddy = PageFrameCount::new(0);
-        let mut res_areas = [PhysMemoryArea::default(); 128];
+        static mut RES_AREAS: [PhysMemoryArea; 128] = [PhysMemoryArea::DEFAULT; 128];
         let mut offset_in_remain_area = bump_allocator
-            .remain_areas(&mut res_areas)
+            .remain_areas(&mut RES_AREAS)
             .expect("BuddyAllocator: failed to get remain areas from bump allocator");
 
-        let remain_areas = &res_areas[0..];
+        let remain_areas = &RES_AREAS[0..];
 
         for area in remain_areas {
             let mut paddr = (area.area_base_aligned() + offset_in_remain_area).data();
@@ -120,7 +121,7 @@ impl<A: MemoryManagementArch> BuddyAllocator<A> {
             if remain_pages.data() == 0 {
                 continue;
             }
-            debug!("area: {area:?}, paddr: {paddr:#x}, remain_pages: {remain_pages:?}");
+            // debug!("area: {area:?}, paddr: {paddr:#x}, remain_pages: {remain_pages:?}");
 
             total_pages_to_buddy += remain_pages;
 

kernel/src/mm/no_init.rs

@@ -51,7 +51,13 @@ pub struct EarlyIoRemapPages {
 impl EarlyIoRemapPages {
     /// 预留的用于在内存管理初始化之前，映射内存所使用的页表数量
     pub const EARLY_REMAP_PAGES_NUM: usize = 256;
-    pub const fn new() -> Self {
+
+    /// 创建一个新的EarlyIoRemapPages实例
+    ///
+    /// # Safety
+    /// 由于该函数只在编译时被调用，因此 `#[allow(clippy::large_stack_frames)]` 是安全的。
+    #[allow(clippy::large_stack_frames)]
+    const fn new() -> Self {
         Self {
             pages: [EarlyRemapPage {
                 data: [0; MMArch::PAGE_SIZE],