Suggestions from Godmar Back.

[pintos-anon] / TODO

diff --git a/TODO b/TODO
index a07e2b422e21fe45b32a9f4cb5dc37c3ceb297b7..7d6ba406ed2365122dc213cb8b30da257f582db2 100644 (file)
--- a/TODO
+++ b/TODO
@@ -1,18 +1,38 @@
 -*- text -*-
 
-* Clean up:
+* Get rid of rox--causes more trouble than it's worth
+
+* Reconsider command line arg style--confuses everyone.
+
+* pintos script doesn't (always?) delete temp disks
+
+* Finish writing tour.
+
+via Godmar Back:
+
+* Project 3 solution needs FS lock.
+
+* Get rid of mmap syscall, add sbrk.
+
+* hash_destroy() should take function arg.
+
+* Make backtrace program accept multiple object file arguments,
+  e.g. add -u option to allow backtracing user program also.
+
+* VM projects do not use enough memory to force eviction.
+  Should reduce user limit or increase memory consumption.
+
+
 
-  - Replace AT&T assembly code by Intel assembly so that students can
-    figure out the asm from the Intel manuals.  Compare object files
-    before and after to make sure nothing changed.
 
-* Userprog project:
 
-  - Move `join' implementation here, from `threads' project, to help
-    normalize the project difficulties.
+* process_death test needs improvement
 
-  - The semantics of the join system call should change so that it
-    only returns the exit code once.
+* Internal tests.
+
+* Improve automatic interpretation of exception messages.
+
+* Userprog project:
 
   - Mark read-only pages as actually read-only in the page table.  Or,
     since this was consistently rated as the easiest project by the
@@ -24,9 +44,14 @@
     Alternately we could just remove the synchronization on pid
     selection and check that students fix it.
 
-* Documentation:
+* Filesys project:
+
+  - 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.
 
-  - Finish writing tour.
+* Documentation:
 
   - Add "Digging Deeper" sections that describe the nitty-gritty x86
     details for the benefit of those interested.
@@ -40,23 +65,10 @@
 
     . Low-level x86 stuff, like paged page tables.
 
-    . Other good ideas.
-
-  - mmap/munmap should use segment IDs like Nachos.  Too hard
-    otherwise.
-
-  - Add src/testcases/vm, src/testcases/filesys and make it clear to use
-    them?
+    . Specifics on how to implement sbrk, malloc.
 
-* Tests:
-
-  - Release some of them.
-
-  - The threads, userprog, vm test source files could use
-    factorization and cleanup along the lines of fslib in the filesys
-    tests.
+    . Other good ideas.
 
-  - The p1-4.c testcase needs significant tuning.  Currently it takes
-    too long (especially when SHOW_PROGRESS is turned on) and doesn't
-    show significant improvement.
+    . opendir/readdir/closedir
 
+    . everything needed for getcwd()