5 - Speed up disk routines: filling an 8 MB disk takes a long time.
6 (They're only slow because timer_sleep always waits for at least
9 - userprog project should mark read-only pages as actually read-only
10 in the page table. Or, since this was consistently rated as the
11 easiest project by the students, require them to do it.
13 - For userprog project, don't provide per-process pagedir
14 implementation but only single-process implementation and require
15 students to implement the separation? This project was rated as
16 the easiest after all. Alternately we could just remove the
17 synchronization on pid selection and check that students fix it.
21 - Finish writing tour.
23 - Add "Digging Deeper" sections that describe the nitty-gritty x86
24 details for the benefit of those interested.
30 . Low-level x86 stuff, like paged page tables.
34 - The semantics of the join system call should change so that it
35 only returns the exit code once.
37 - mmap/munmap should use segment IDs like Nachos. Too hard
40 - Add src/testcases/vm, src/testcases/filesys and make it clear to use
45 - Release some of them.
47 - The threads, userprog, vm test source files could use
48 factorization and cleanup along the lines of fslib in the filesys
51 - The p1-4.c testcase needs significant tuning. Currently it takes
52 too long (especially when SHOW_PROGRESS is turned on) and doesn't
53 show significant improvement.