Add notes on why system crashes

2 files changed, 6 insertions, 3 deletions

diff --git a/arch/x86_64/include/arch/memory/paging/active_page_table.hpp b/arch/x86_64/include/arch/memory/paging/active_page_table.hpp
index c7d835a..c5b972b 100644
--- a/arch/x86_64/include/arch/memory/paging/active_page_table.hpp
+++ b/arch/x86_64/include/arch/memory/paging/active_page_table.hpp
@@ -166,8 +166,11 @@ namespace teachos::arch::memory::paging
       }
       // TODO: Flushing only specifc page does not work and cause temporary_page.map_table_frame to return an invalid
       // page table (Memory inside buffer shows nothing)
-      cpu::tlb_flush(page.start_address());
-      // cpu::tlb_flush_all();
+      // cpu::tlb_flush(page.start_address());
+      // This is the case, because we have unmapped the active page and it is completly invalid, if we only flush one
+      // page, the other pages which are huge still exist in the cache and can therefore still be accessed. But because
+      // they are huge pages the temporary page is not mapped correctly.
+      cpu::tlb_flush_all();
     }
 
   private:
diff --git a/arch/x86_64/src/kernel/main.cpp b/arch/x86_64/src/kernel/main.cpp
index f9b252d..679fb8d 100644
--- a/arch/x86_64/src/kernel/main.cpp
+++ b/arch/x86_64/src/kernel/main.cpp
@@ -25,7 +25,7 @@ namespace teachos::arch::kernel
     memory::cpu::set_efer_bit(memory::cpu::efer_flags::NXE);
 
     memory::paging::kernel_mapper kernel(allocator, memory_information);
-    auto & active_table = kernel.remap_kernel();
+    kernel.remap_kernel();
     video::vga::text::write("Kernel remapping successfull", video::vga::text::common_attributes::green_on_black);
 
     // TODO: Map heap virtual pages with active table