From c37b82251bbe85edf2d46284f6d4b43b92b09182 Mon Sep 17 00:00:00 2001 From: Ben Pfaff Date: Fri, 10 Dec 2004 06:34:54 +0000 Subject: [PATCH] Update. --- TODO | 60 +++++++++++++++++++++++++++++++++++++++++++++--------------- 1 file changed, 45 insertions(+), 15 deletions(-) diff --git a/TODO b/TODO index d831a47..f02d750 100644 --- a/TODO +++ b/TODO @@ -1,24 +1,54 @@ -*- 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. +* Code: -* The semantics of the join system call should change so that it only - returns the exit code once. + - 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.) -* mmap/munmap should use segment IDs like Nachos. Too hard otherwise. + - 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. -* Finish writing the tour. + - 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. -* Come up with a way for us to release some of the tests. +* Documentation: -* userprog project should mark read-only pages as actually read-only - in the page table + - Finish writing tour. -* Add src/testcases/vm, src/testcases/filesys and make it clear to use - them? + - 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. -* 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.) -- 2.30.2