X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=TODO;h=7d6ba406ed2365122dc213cb8b30da257f582db2;hb=31711e65718e8334dbb672eca64b6b4b906d1a03;hp=ec8df9754fac7cb4a80fbf6aef12cd73848e9e25;hpb=8925763e88de77ae041d77082d7b8d00fb58c7d2;p=pintos-anon

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 -*- text -*-
 
-* 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.
+* Get rid of rox--causes more trouble than it's worth
 
-* The semantics of the join system call should change so that it only
-  returns the exit code once.
+* Reconsider command line arg style--confuses everyone.
 
-* mmap/munmap should use segment IDs like Nachos.  Too hard otherwise.
+* 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.
+
+
+
+
+
+* process_death test needs improvement
+
+* 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
+    students, require them to do it.
+
+  - Don't provide per-process pagedir implementation but only
+    single-process implementation and require students to implement
+    the separation?  This project was rated as the easiest after all.
+    Alternately we could just remove the synchronization on pid
+    selection and check that students fix it.
+
+* 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.
+
+* Documentation:
+
+  - Add "Digging Deeper" sections that describe the nitty-gritty x86
+    details for the benefit of those interested.
+
+  - Add explanations of what "real" OSes do to give students some
+    perspective.
+
+* Assignments:
+
+  - Add extra credit:
+
+    . Low-level x86 stuff, like paged page tables.
+
+    . Specifics on how to implement sbrk, malloc.
+
+    . Other good ideas.
+
+    . opendir/readdir/closedir
+
+    . everything needed for getcwd()