X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=TODO;h=1999f7033692229667ea30bb5df30aab22620b1b;hb=2655ee80b0014689c2d8fffcf67e4d6b1546b298;hp=c61d44cb975211e0ac2888f351d36df02780ad85;hpb=49f91ea15da93b7df4b946d42c70e09e740f3c06;p=pintos-anon

diff --git a/TODO b/TODO
index c61d44c..1999f70 100644
--- a/TODO
+++ b/TODO
@@ -2,12 +2,26 @@
 
 * The tests in tests/ don't apply the grading patches.
 
+* We need better example programs.
+
+  - Need an mmap example program as a replacement for the crappy mmap FAQ
+    question.
+
 * 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.
 
@@ -24,6 +38,30 @@
     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.
+
+* 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.
@@ -40,10 +78,9 @@
 
     . Low-level x86 stuff, like paged page tables.
 
-    . Other good ideas.
+    . 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?