Update

[pintos-anon] / TODO

diff --git a/TODO b/TODO
index 1999f7033692229667ea30bb5df30aab22620b1b..da3937dec3f973f08b71e378cecd332bf9ae4266 100644 (file)
--- a/TODO
+++ b/TODO
@@ -1,15 +1,20 @@
 -*- text -*-
 
-* The tests in tests/ don't apply the grading patches.
+* Remove names from synchronization primitives?  They don't seem
+  useful in practice.
 
-* We need better example programs.
+* debug_backtrace() in kernel should only dereference valid pointers.
+
+* Mention how to use add-symbol-file in gdb.
+
+* We need better and more example programs.
 
   - Need an mmap example program as a replacement for the crappy mmap FAQ
     question.
 
-* Threads:
+  - How about `diff' and `cmp' programs?
 
-  - join-invalid doesn't compile if tid_t is not scalar type.
+* Threads:
 
   - mlfqs tests suck.  They aren't even correct, e.g. the amarv
     submission from win0405 is graded incorrectly.
@@ -22,12 +27,6 @@
     project 3 and in real OSes.  Also revise the grading criteria to
     match.
 
-  - 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.
@@ -45,6 +44,8 @@
 
   - Sample solution.
 
+  - Update grading/vm to reflect new mmap, munmap forms.
+
 * Filesys project:
 
   - Increase maximum disk size from 8 MB to something that actually
@@ -54,14 +55,17 @@
 
     Alternatively, shrink the inode size.
 
-  - Add mkdir and ls example user programs.
-
   - Add option to disable buffer cache.
 
-  - Get rid of "dump" commands--they're not really useful.
-
   - Sample solution.
 
+  - Need a better way to measure performance improvement of buffer
+    cache.  Some students reported that their system was slower with
+    cache--likely, Bochs doesn't simulate a disk with a realistic
+    speed.
+
+  - Clarify effect of remove(cwd).
+
 * Documentation:
 
   - Finish writing tour.
@@ -72,6 +76,8 @@
   - Add explanations of what "real" OSes do to give students some
     perspective.
 
+  - GNU make 3.80 or later is required.
+
 * Assignments:
 
   - Add extra credit:
@@ -82,8 +88,9 @@
 
     . Other good ideas.
 
-  - Add src/testcases/vm, src/testcases/filesys and make it clear to use
-    them?
+    . opendir/readdir/closedir
+
+    . everything needed for getcwd()
 
 * Tests:
 
@@ -97,3 +104,9 @@
     too long (especially when SHOW_PROGRESS is turned on) and doesn't
     show significant improvement.
 
+* Code:
+
+  - Need an optimization barrier and an explanation of it in the
+    documentation.
+
+  - Need to check the wait system call more thoroughly.