From 28caa0ae20dc6478c80477fcc7d6a29aba7bbde2 Mon Sep 17 00:00:00 2001
From: c4fiber <qudcjf153@gmail.com>
Date: Thu, 19 Oct 2023 15:16:17 +0000
Subject: [PATCH] =?UTF-8?q?feat(lazy=5Fload=5Ffile):=20=ED=8C=8C=EC=9D=BC?=
 =?UTF-8?q?=EB=82=B4=EC=9A=A9=20=EB=B3=B5=EC=82=AC=20=ED=9B=84=20dirty=20?=
 =?UTF-8?q?=ED=95=B4=EC=A0=9C=20(mmap-clean)=20=EC=84=B1=EA=B3=B5?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 userprog/syscall.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/userprog/syscall.c b/userprog/syscall.c
index 8078cf7..6dfb4a2 100644
--- a/userprog/syscall.c
+++ b/userprog/syscall.c
@@ -463,6 +463,10 @@ static bool lazy_load_file(struct page *page, void *aux) {
   memset(upage + read_bytes, 0, zero_bytes);
 
   free(aux); // 인자 (malloc) free 수행
+  
+  // set not dirty: 파일 내용을 복사하면서 dirty로 체크됨.
+  // 이를 해제해두면 memeory에 데이터가 쓸때 dirty가 체크되므로 수정여부를 판단 가능
+  pml4_set_dirty(thread_current()->pml4, page->va, false);
 
   return true;
 }