More to-do.

[pintos-anon] / TODO

diff --git a/TODO b/TODO
index 1b0d43f0e8faaf20ee7c1bd47d53438401f00da8..ac46639a58fe89733ad6889dfd728a1a262e80e8 100644 (file)
--- a/TODO
+++ b/TODO
@@ -1,14 +1,36 @@
 -*- text -*-
 
-* Grader:
+* The tests in tests/ don't apply the grading patches.
 
-  - Fix bug where failures are being treated as warnings.
+* We need better and more example programs.
+
+  - Need an mmap example program as a replacement for the crappy mmap FAQ
+    question.
+
+* Make it clear that the students own their code, because there was some
+  confusion on that point.
+
+* Threads:
+
+  - join-invalid doesn't compile if tid_t is not scalar type.
+
+  - mlfqs tests suck.  They aren't even correct, e.g. the amarv
+    submission from win0405 is graded incorrectly.
 
 * Userprog project:
 
+  - Don't emphasize that stuff needs to be copied from user space to
+    kernel space.  Instead, emphasize validation and suggest that
+    copying is a common solution and that it will be necessary in
+    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.
@@ -19,6 +41,32 @@
     Alternately we could just remove the synchronization on pid
     selection and check that students fix it.
 
+* VM project:
+
+  - Discuss the perils of mixing dirty bits between kernel and user virtual
+    memory.
+
+  - Sample solution.
+
+  - Update grading/vm to reflect new mmap, munmap forms.
+
+* Filesys project:
+
+  - Increase maximum disk size from 8 MB to something that actually
+    requires doubly indirect nodes.  There is a negative pressure here
+    from the bitmap object--perhaps we need a specialized bitmap that
+    doesn't have to be all in-memory at once.
+
+    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.
+
 * Documentation:
 
   - Finish writing tour.
@@ -35,13 +83,9 @@
 
     . Low-level x86 stuff, like paged page tables.
 
-    . Other good ideas.
-
-  - The semantics of the join system call should change so that it
-    only returns the exit code once.
+    . Specifics on how to implement sbrk, malloc.
 
-  - mmap/munmap should use segment IDs like Nachos.  Too hard
-    otherwise.
+    . Other good ideas.
 
   - Add src/testcases/vm, src/testcases/filesys and make it clear to use
     them?