X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=TODO;h=d4afd5c0ad8b2782c3403364270b50bdc385c903;hb=12399ec5a71cb2fde72835f6abde1cef8e6057e6;hp=711a4ef3264763f060ab48f6ba2b4eac1e1d4528;hpb=eb852c21dbad39bb4a7e7803a7bb09b3aac7322d;p=pintos-anon

diff --git a/TODO b/TODO
index 711a4ef..d4afd5c 100644
--- a/TODO
+++ b/TODO
@@ -2,7 +2,15 @@
 
 * The tests in tests/ don't apply the grading patches.
 
-* We need better example programs.
+* We need better and more example programs.
+
+  - Need an mmap example program as a replacement for the crappy mmap FAQ
+    question.
+
+  - How about `diff' and `cmp' programs?
+
+* Make it clear that the students own their code, because there was some
+  confusion on that point.
 
 * Threads:
 
@@ -35,6 +43,15 @@
     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
@@ -50,6 +67,15 @@
 
   - 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.
@@ -66,10 +92,13 @@
 
     . Low-level x86 stuff, like paged page tables.
 
+    . Specifics on how to implement sbrk, malloc.
+
     . Other good ideas.
 
-  - mmap/munmap should use segment IDs like Nachos.  Too hard
-    otherwise.
+    . opendir/readdir/closedir
+
+    . everything needed for getcwd()
 
   - Add src/testcases/vm, src/testcases/filesys and make it clear to use
     them?
@@ -86,3 +115,11 @@
     too long (especially when SHOW_PROGRESS is turned on) and doesn't
     show significant improvement.
 
+* Code:
+
+  - Rewrite quick_sort() to use heap sort, for O(1) stack usage.
+
+  - Rewrite list_sort() to use merge sort, for O(1) heap usage.
+
+  - Make list_elem and hash_elem a struct, by encapsulating a struct
+    list_elem inside a struct hash_elem as a member.