X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=inline;f=TODO;h=b4e216e1288f0ced59b414d8979ce303c0771099;hb=b70589c7e69919f9a411f02f512bd0c6e483d1a4;hp=f02d750548fb15914974bcd99d7515bcb8efb49c;hpb=c37b82251bbe85edf2d46284f6d4b43b92b09182;p=pintos-anon

diff --git a/TODO b/TODO
index f02d750..b4e216e 100644
--- a/TODO
+++ b/TODO
@@ -1,20 +1,32 @@
 -*- text -*-
 
-* Code:
+* FS and GS:
 
-  - Speed up disk routines: filling an 8 MB disk takes a long time.
-    (They're only slow because timer_sleep always waits for at least
-    one timer tick.)
+  - struct intr_frame: Add members.
+  
+  - intr_entry(): Save, reset.
 
-  - userprog project should mark read-only pages as actually read-only
-    in the page table.  Or, since this was consistently rated as the
-    easiest project by the students, require them to do it.
+  - intr_exit(): Restore.
 
-  - For userprog project, don't provide per-process pagedir
-    implementation but only single-process implementation and require
-    students to implement the separation?  This project was rated as
-    the easiest after all.  Alternately we could just remove the
-    synchronization on pid selection and check that students fix it.
+  - execute_thread(): Initialize.
+
+* Userprog project:
+
+  - Move `join' implementation here, from `threads' project, to help
+    normalize the project difficulties.
+
+  - The semantics of the join system call should change so that it
+    only returns the exit code once.
+
+  - Mark read-only pages as actually read-only in the page table.  Or,
+    since this was consistently rated as the easiest project by the
+    students, require them to do it.
+
+  - Don't provide per-process pagedir implementation but only
+    single-process implementation and require students to implement
+    the separation?  This project was rated as the easiest after all.
+    Alternately we could just remove the synchronization on pid
+    selection and check that students fix it.
 
 * Documentation:
 
@@ -23,6 +35,9 @@
   - Add "Digging Deeper" sections that describe the nitty-gritty x86
     details for the benefit of those interested.
 
+  - Add explanations of what "real" OSes do to give students some
+    perspective.
+
 * Assignments:
 
   - Add extra credit:
@@ -31,9 +46,6 @@
 
     . Other good ideas.
 
-  - The semantics of the join system call should change so that it
-    only returns the exit code once.
-
   - mmap/munmap should use segment IDs like Nachos.  Too hard
     otherwise.