-*- text -*-

* Code:

  - Speed up disk routines: filling an 8 MB disk takes a long time.
    (They're only slow because timer_sleep always waits for at least
    one timer tick.)

  - userprog project should 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.

  - For userprog project, 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.

* Documentation:

  - Finish writing tour.

  - Add "Digging Deeper" sections that describe the nitty-gritty x86
    details for the benefit of those interested.

* Assignments:

  - Add extra credit:

    . Low-level x86 stuff, like paged page tables.

    . Other good ideas.

  - The semantics of the join system call should change so that it
    only returns the exit code once.

  - 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?

* 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.

  - 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.