Comment.

[pintos-anon] / TODO

diff --git a/TODO b/TODO
index a4e3e31c080d3a2d5f0a004ec08f10e1d05bc540..38836157fc052fe3a07b91d5d03bea94c64ac104 100644 (file)
--- a/TODO
+++ b/TODO
@@ -7,11 +7,6 @@ that span multiple pages, where some are mapped and some are not.
 An implementation that only checks the first page, rather than all pages 
 that can be touched during a call to read()/write() passes all tests.
 
 An implementation that only checks the first page, rather than all pages 
 that can be touched during a call to read()/write() passes all tests.
 

-- In Project 2, we're missing a test that would fail if they assumed
-that contiguous user-virtual addresses are laid out contiguously 
-in memory.  The loading code should ensure that non-contiguous 
-physical pages are allocated for the data segment (at least.)
-

 - Need some tests that test that illegal accesses lead to process
 termination. I have written some, will add them. In P2, obviously, 
 this would require that the students break this functionality since 
 - Need some tests that test that illegal accesses lead to process
 termination. I have written some, will add them. In P2, obviously, 
 this would require that the students break this functionality since 


@@ -26,22 +21,6 @@ Add a system call "get_kernel_memory_information".  User programs
 could engage in a variety of activities and notice leaks by checking
 the kernel memory statistics.
 
 could engage in a variety of activities and notice leaks by checking
 the kernel memory statistics.
 

-From: "Godmar Back" <godmar@gmail.com>
-Subject: set_priority & donation - a TODO item
-To: "Ben Pfaff" <blp@cs.stanford.edu>
-Date: Mon, 20 Feb 2006 22:20:26 -0500
-
-Ben,
-
-it seems that there are currently no tests that check the proper
-behavior of thread_set_priority() when called by a thread that is
-running under priority donation.  The proper behavior, I assume, is to
-temporarily drop the donation if the set priority is higher, and to
-reassume the donation should the thread subsequently set its own
-priority again to a level that's lower than a still active donation.
-
- - Godmar
-

 From: Godmar Back <godmar@gmail.com>
 Subject: on caching in project 4
 To: Ben Pfaff <blp@cs.stanford.edu>
 From: Godmar Back <godmar@gmail.com>
 Subject: on caching in project 4
 To: Ben Pfaff <blp@cs.stanford.edu>


@@ -76,13 +55,6 @@ the same performance, which raises the suspicion that the test
 workload might not force any cache replacement, so the eviction
 strategy doesn't matter.)
 
 workload might not force any cache replacement, so the eviction
 strategy doesn't matter.)
 

-Godmar Back <godmar@gmail.com> writes:
-
-> in your sample solution to P4, dir_reopen does not take any locks when
-> changing a directory's open_cnt. This looks like a race condition to
-> me, considering that dir_reopen is called from execute_process without
-> any filesystem locks held.
-

 * Get rid of rox--causes more trouble than it's worth
 
 * Reconsider command line arg style--confuses everyone.
 * Get rid of rox--causes more trouble than it's worth
 
 * Reconsider command line arg style--confuses everyone.


@@ -102,20 +74,6 @@ via Godmar Back:
 
 * Internal tests.
 
 
 * 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
 * Filesys project:
 
   - Need a better way to measure performance improvement of buffer


@@ -135,14 +93,10 @@ via Godmar Back:
 
   - Add extra credit:
 
 
   - Add extra credit:
 

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

     . Specifics on how to implement sbrk, malloc.
 
     . Other good ideas.
 
     . Specifics on how to implement sbrk, malloc.
 
     . Other good ideas.
 

-    . opendir/readdir/closedir
-

     . everything needed for getcwd()
 
 To add partition support:
     . everything needed for getcwd()
 
 To add partition support: