Ben Pfaff [Sat, 23 Aug 2008 03:44:32 +0000 (03:44 +0000)]
Use macros for 8259A PIC registers, instead of writing them literally.
Based on patch from Anthony Romano <chz@vt.edu>, so update authorship
information given that Anthony is going to be contributing quite a
bit.
Ben Pfaff [Thu, 21 Aug 2008 04:49:45 +0000 (04:49 +0000)]
Use --build-id=none to avoid build-id sections on FC8.
These build-id sections cause the Pintos ELF loader to reject
binaries. The preferred way to eliminate them would be to add
/DISCARD/ : { *(.note.gnu.build-id) }
to the linker script, but (as reported by Godmar Back) this causes a
segmentation fault in ld, as reported in a bug filed at:
http://sourceware.org/bugzilla/show_bug.cgi?id=5025
Ben Pfaff [Sat, 2 Aug 2008 11:30:43 +0000 (11:30 +0000)]
Fix asm constraints to avoid SI, DI for byte and word access.
Thanks to Ed Lyle Karrels <karrels@stanford.edu> for reporting the
problem.
Ben Pfaff [Fri, 18 Jul 2008 01:13:29 +0000 (01:13 +0000)]
Fix bug in --sim and --debug options reported by Bob Lantz.
Ben Pfaff [Thu, 3 Jul 2008 20:10:32 +0000 (20:10 +0000)]
Specify rounding for priority calculations.
Pointed out by Ed Karrels <karrels@stanford.edu>.
Ben Pfaff [Thu, 3 Jul 2008 19:31:27 +0000 (19:31 +0000)]
No longer recommend SourceForge.
Really it seems like a bad idea for students.
Ben Pfaff [Thu, 3 Jul 2008 19:30:05 +0000 (19:30 +0000)]
Make recent Texinfo accept devel.texi.
Ben Pfaff [Mon, 17 Mar 2008 11:56:48 +0000 (11:56 +0000)]
Wording improvements, from "Valentin I. Spitkovsky"
<vspitkovsky@yahoo.com>.
Ben Pfaff [Thu, 21 Feb 2008 04:25:17 +0000 (04:25 +0000)]
Reference to threads/exception.c should be to userprog/exception.c.
Thanks to Matt Jones <mkjones@stanford.edu> for reporting this bug.
Ben Pfaff [Thu, 14 Feb 2008 08:17:14 +0000 (08:17 +0000)]
Explain why a null pointer sentinel must be pushed on the stack.
From Valentin I. Spitkovsky <vspitkovsky@yahoo.com>.
Ben Pfaff [Thu, 14 Feb 2008 08:12:21 +0000 (08:12 +0000)]
Grammar fixes.
From Valentin I. Spitkovsky <vspitkovsky@yahoo.com>.
Ben Pfaff [Sat, 26 Jan 2008 16:43:15 +0000 (16:43 +0000)]
Use -fno-stack-protector with GCC versions that support it, to fix a
linker error on platform on which -fstack-protector is default, such
as recent versions of Ubuntu.
Ben Pfaff [Thu, 24 Jan 2008 18:49:45 +0000 (18:49 +0000)]
Fix typos.
Reported by Valentin I. Spitkovsky <vspitkovsky@yahoo.com>.
Ben Pfaff [Thu, 24 Jan 2008 18:48:41 +0000 (18:48 +0000)]
Fix reversal of "acquire" and "release" in Locks section.
Reported by Valentin I. Spitkovsky <vspitkovsky@yahoo.com>.
Godmar Back [Wed, 9 Jan 2008 19:48:05 +0000 (19:48 +0000)]
- moved all instructions that related to local CVS/group setup in localcvsinstructions.texi
- added variables recommendsourceforge, recommendvnc, and recommendcygwin to include/exclude
recommendations to use sourceforge, VNC, and Cygwin, resp.
Godmar Back [Sat, 17 Nov 2007 09:42:26 +0000 (09:42 +0000)]
- add localsettings.texi which contains Stanford-local macros and variables
- threads.texi - removed comment about being welcome to implement priority donation for semaphores
- vm.texi - added FAQ about how to resume. It truely is a FAQ, at least here at Tech.
- debug.texi - updated Bochs build instructions
Godmar Back [Fri, 16 Nov 2007 02:18:35 +0000 (02:18 +0000)]
added IGNORE_USER_FAULTS clause to match specification
Godmar Back [Sun, 23 Sep 2007 15:40:23 +0000 (15:40 +0000)]
fixed typo: "pass" should be "fail"
Ben Pfaff [Fri, 18 May 2007 23:23:51 +0000 (23:23 +0000)]
Clean some more files.
Ben Pfaff [Mon, 7 May 2007 23:02:07 +0000 (23:02 +0000)]
Fix warning.
Ben Pfaff [Mon, 23 Apr 2007 00:05:33 +0000 (00:05 +0000)]
Correctly initialize the esp0 pointer in the TSS for the initial
kernel thread. Shouldn't actually matter in practice, because that
pointer is only used on a user->kernel transition, and the initial
kernel thread never runs a user process.
Reported by Godmar Back.
Ben Pfaff [Mon, 2 Apr 2007 08:10:25 +0000 (08:10 +0000)]
Ignore tags and cscope files.
Ben Pfaff [Mon, 2 Apr 2007 07:23:22 +0000 (07:23 +0000)]
Improve comment on thread_unblock().
Suggested by Godmar Back.
Ben Pfaff [Sat, 31 Mar 2007 14:40:52 +0000 (14:40 +0000)]
Fix bugs in -j and -r options reported by Godmar Back.
Ben Pfaff [Sat, 31 Mar 2007 14:40:29 +0000 (14:40 +0000)]
Fix bug in jitter reported by Godmar Back (BIOS wouldn't finish
initializing).
Ben Pfaff [Sat, 31 Mar 2007 14:12:03 +0000 (14:12 +0000)]
Fix specification of "write" system call to match the file system
implementation and the tests.
Ben Pfaff [Sat, 31 Mar 2007 13:49:21 +0000 (13:49 +0000)]
Describe cscope.
Ben Pfaff [Sat, 31 Mar 2007 12:26:45 +0000 (12:26 +0000)]
Delete question about pwd.c program, as agreed with Godmar earlier.
Ben Pfaff [Sat, 24 Mar 2007 01:26:18 +0000 (01:26 +0000)]
Improve wording.
From Godmar Back.
Ben Pfaff [Sat, 24 Mar 2007 01:12:10 +0000 (01:12 +0000)]
Explain the semantics of exec in more detail.
From Godmar Back.
Ben Pfaff [Sat, 24 Mar 2007 01:04:19 +0000 (01:04 +0000)]
Add helpful comment.
From Godmar Back.
Ben Pfaff [Sat, 24 Mar 2007 01:02:19 +0000 (01:02 +0000)]
Add "cscope" target.
Ben Pfaff [Sat, 24 Mar 2007 01:01:06 +0000 (01:01 +0000)]
Rename execute_thread() to start_process().
Thanks to Godmar Back for pointing out that it could be better named.
Ben Pfaff [Sat, 24 Mar 2007 00:56:57 +0000 (00:56 +0000)]
Clarify that create and remove work on files, not on file descriptors.
Thanks to Godmar Back for pointing out the need.
Ben Pfaff [Thu, 8 Mar 2007 03:56:24 +0000 (03:56 +0000)]
Fix bug in *-persistence tests when prerequisites fail.
Reported by Tanvi Vyas <tanvi@stanford.edu>.
Ben Pfaff [Wed, 7 Mar 2007 14:52:06 +0000 (14:52 +0000)]
Fix inconstiency in recent_cpu update description.
Ben Pfaff [Sun, 11 Feb 2007 04:45:07 +0000 (04:45 +0000)]
Fix typo.
Ben Pfaff [Sun, 11 Feb 2007 04:44:25 +0000 (04:44 +0000)]
Clarify description of "wait" syscall. Thanks to Evan Kutter
<ejk@stanford.edu> for describing the issue.
Ben Pfaff [Tue, 6 Feb 2007 21:09:10 +0000 (21:09 +0000)]
Improve example for "Can a thread's priority change while it is on the
ready queue?" FAQ. From Godmar Back.
Godmar Back [Tue, 6 Feb 2007 06:44:01 +0000 (06:44 +0000)]
added patch to make bochs work with gdb 6.5
Ben Pfaff [Sun, 28 Jan 2007 04:21:55 +0000 (04:21 +0000)]
Fix order of checks on load average.
From a CS140 student, via Ben Sapp.
Ben Pfaff [Sun, 21 Jan 2007 10:29:26 +0000 (10:29 +0000)]
Add i86pc to unames detected as x86 (used by Solaris).
From Michael Gregory <mpgreg@stanford.edu>.
Godmar Back [Sat, 13 Jan 2007 14:39:41 +0000 (14:39 +0000)]
fixed grammar/typo
Ben Pfaff [Thu, 11 Jan 2007 08:02:13 +0000 (08:02 +0000)]
Set VERBOSE to empty string by default, which prevents an environment
variable named VERBOSE from causing trouble but still allows it to be
overridden by the user on the command line. (Some of the Stanford
machines set VERBOSE=yes in the environment by default on log-in.)
Ben Pfaff [Thu, 11 Jan 2007 07:48:07 +0000 (07:48 +0000)]
Remove unnecessary semicolon that gives GNU make 3.80 fits.
Ben Pfaff [Thu, 11 Jan 2007 06:57:40 +0000 (06:57 +0000)]
Don't call bx_gdbstub_exception when we're not compiling the gdb stub.
Thanks to Godmar Back for pointing this out.
Ben Pfaff [Tue, 9 Jan 2007 17:46:42 +0000 (17:46 +0000)]
Add -MF to GCC invocation to make ccache happy on Fedora Core 6.
Godmar Back [Mon, 8 Jan 2007 09:55:17 +0000 (09:55 +0000)]
clarified stack limit issue and removed comment about first instruction faulting in stack page
Godmar Back [Mon, 8 Jan 2007 08:46:49 +0000 (08:46 +0000)]
- removed @ref to "printf Reboots" since this no longer applies and the @anchor is gone
- fixed typo print -> printf
Godmar Back [Mon, 8 Jan 2007 06:11:37 +0000 (06:11 +0000)]
adjusted scores for P4 as discussed
Godmar Back [Sun, 7 Jan 2007 21:38:02 +0000 (21:38 +0000)]
Cosmetic fix: make first column wider to account for longer names in p4.
Godmar Back [Sun, 7 Jan 2007 20:55:28 +0000 (20:55 +0000)]
- adjustments to scores for P3 as discussed.
- increased problem size for page-* tests to force eviction
Godmar Back [Sun, 7 Jan 2007 20:54:54 +0000 (20:54 +0000)]
adjustments to scores for P2 as discussed.
Godmar Back [Sat, 6 Jan 2007 19:00:52 +0000 (19:00 +0000)]
- added priority-donate-chain test which tests 8-level deep nested donation
- adjusted weights for P1 Grading file
Ben Pfaff [Thu, 4 Jan 2007 15:13:49 +0000 (15:13 +0000)]
Separate persistence tests from the extended filesys tests.
Suggested by Godmar Back.
Ben Pfaff [Thu, 4 Jan 2007 14:19:25 +0000 (14:19 +0000)]
New page-merge-mm, page-merge-stk tests.
Thanks to Godmar Back for suggestion.
Ben Pfaff [Mon, 18 Dec 2006 18:33:52 +0000 (18:33 +0000)]
Make comment more readable.
Ben Pfaff [Fri, 15 Dec 2006 19:40:03 +0000 (19:40 +0000)]
Fix expected output.
Ben Pfaff [Fri, 15 Dec 2006 14:58:10 +0000 (14:58 +0000)]
Don't require distinguishing data and metadata for caching.
Another suggestion for implementation order.
From Godmar.
Ben Pfaff [Fri, 15 Dec 2006 14:24:48 +0000 (14:24 +0000)]
Fix comment.
Ben Pfaff [Fri, 15 Dec 2006 14:21:04 +0000 (14:21 +0000)]
When printing a directory tree, indicate explicitly if it's empty.
Ben Pfaff [Mon, 11 Dec 2006 20:40:20 +0000 (20:40 +0000)]
Parse command-line options much earlier, so that thread_mlfqs is
initialized before thread_init() gets hold of it.
Also allow console output much earlier, by doing initialization
whenever we call into it first and by only trying to take the console
lock after threads have been initialized.
Don't try to take the console lock after the kernel panics, to avoid
getting nailed so hard by bugs in lock_acquire().
Suggested by Godmar Back.
Ben Pfaff [Fri, 8 Dec 2006 23:40:23 +0000 (23:40 +0000)]
New target to generate cscope.files.
Ben Pfaff [Fri, 8 Dec 2006 18:47:37 +0000 (18:47 +0000)]
Make it possible to ignore page faults in GDB.
From su.class.cs140 and Godmar Back.
Ben Pfaff [Fri, 8 Dec 2006 16:06:31 +0000 (16:06 +0000)]
Revert the bitmap randomization change, which had the side effect of
causing enough disk fragmentation for the base (extent-based) file
system that in some cases tests would fail. Also, it confused the
hell out of everyone. Failed experiment.
Ben Pfaff [Fri, 8 Dec 2006 15:39:32 +0000 (15:39 +0000)]
When reading files out of the scratch disk, don't die with an error
exit code if there's a bad signature, because that's a guest error not
a host error. (If we do exit with an error code, it fouls up the
grading process.) Instead, just make sure that the host file(s) we
were supposed to retrieve is unlinked.
Ben Pfaff [Fri, 8 Dec 2006 15:29:58 +0000 (15:29 +0000)]
Fix error message when archive fails to open.
Ben Pfaff [Fri, 8 Dec 2006 14:58:02 +0000 (14:58 +0000)]
Explain that multiple file descriptors for a single file are
independent.
From Godmar Back.
Ben Pfaff [Fri, 8 Dec 2006 14:52:37 +0000 (14:52 +0000)]
Note that struct file, struct dir are per-thread.
From Godmar Back.
Ben Pfaff [Fri, 8 Dec 2006 14:48:20 +0000 (14:48 +0000)]
Add Project 4 Suggested Order of Implementation section,
from slides written by Godmar Back.
Ben Pfaff [Fri, 8 Dec 2006 14:35:09 +0000 (14:35 +0000)]
Explain better what we expect from the buffer cache.
Ben Pfaff [Mon, 4 Dec 2006 19:14:26 +0000 (19:14 +0000)]
Use mkdir, not create.
Thanks to "Yuriy" for reporting this bug.
Ben Pfaff [Tue, 21 Nov 2006 13:04:33 +0000 (13:04 +0000)]
Clarify condition on BUF_SIZE in monitor example.
Thanks to Terje Mathiesen for pointing out this issue.
Ben Pfaff [Sat, 11 Nov 2006 14:44:42 +0000 (14:44 +0000)]
Add comment.
Ben Pfaff [Sat, 11 Nov 2006 14:43:15 +0000 (14:43 +0000)]
Drop use of volatile in favor of explicit memory barriers.
Document this use of barriers.
Ben Pfaff [Sat, 11 Nov 2006 14:41:59 +0000 (14:41 +0000)]
Also verify that running "make clean" deletes all the files in the
build directory except for the Makefile itself.
Ben Pfaff [Sat, 11 Nov 2006 14:30:18 +0000 (14:30 +0000)]
Clean tests/vm/zeros.
Ben Pfaff [Sat, 11 Nov 2006 14:29:14 +0000 (14:29 +0000)]
Adopt consistent style in asm statements.
Ben Pfaff [Sat, 11 Nov 2006 14:25:16 +0000 (14:25 +0000)]
Add memory clobbers to several asm statements,
to prevent reordering.
Ben Pfaff [Sat, 11 Nov 2006 14:19:40 +0000 (14:19 +0000)]
Make sure loops_per_tick doesn't overflow to zero.
Ben Pfaff [Fri, 10 Nov 2006 16:53:21 +0000 (16:53 +0000)]
Also clean results, grade.
Ben Pfaff [Fri, 10 Nov 2006 15:51:03 +0000 (15:51 +0000)]
Add "memory" as clobber to the asm used by barrier().
Otherwise at least some versions of GCC assume that no changes to
memory can take place.
Ben Pfaff [Fri, 10 Nov 2006 15:31:18 +0000 (15:31 +0000)]
Also clean bochsout.txt, bochsrc.txt.
Ben Pfaff [Fri, 10 Nov 2006 15:06:15 +0000 (15:06 +0000)]
Minor style updates.
Godmar Back [Fri, 10 Nov 2006 04:36:14 +0000 (04:36 +0000)]
Rewrite of multi-oom. Now descends 10 times and expects to reach the same
depth every time. In addition, fires off some children that consume resources
and then crash. Much more difficult than before.
Godmar Back [Fri, 10 Nov 2006 04:34:20 +0000 (04:34 +0000)]
- when ignoring exit codes, ignore exit(-1) also (previously didn't allow '-')
Godmar Back [Fri, 10 Nov 2006 02:20:08 +0000 (02:20 +0000)]
make loop counter volatile to prevent gcc4.1 from optimizing away entire loop body
Godmar Back [Fri, 10 Nov 2006 02:18:07 +0000 (02:18 +0000)]
added accidentally omitted $ to make operand immediate
Godmar Back [Sat, 4 Nov 2006 20:08:27 +0000 (20:08 +0000)]
clarify use of timer_sleep or acceptable alternatives for implementing
write-behind cache flushing.
Ben Pfaff [Fri, 3 Nov 2006 03:07:56 +0000 (03:07 +0000)]
Clarify purpose and rationale.
From Godmar Back.
Ben Pfaff [Fri, 3 Nov 2006 02:54:48 +0000 (02:54 +0000)]
Remove O_EXCL from flags used to create files to be copied out of a
Pintos scratch disk, in get_scratch_file.
Thanks to Godmar Back for pointing out the problem.
Ben Pfaff [Fri, 3 Nov 2006 02:50:36 +0000 (02:50 +0000)]
Delete .tar, .get-output, and .get-errors files on "clean" target.
Thanks to Godmar Back for pointing out the problem.
Godmar Back [Wed, 1 Nov 2006 21:20:52 +0000 (21:20 +0000)]
added IGNORE_USER_FAULTS flag - so students may report failed stack growth
Godmar Back [Wed, 1 Nov 2006 00:00:42 +0000 (00:00 +0000)]
corrected wrong statement about content of f->esp when page fault
occurs in kernel mode. See [IA32-v3a], figure 5.4 in section 5.12.1.1.
Ben Pfaff [Sat, 7 Oct 2006 19:01:09 +0000 (19:01 +0000)]
Improve comment.
Ben Pfaff [Thu, 5 Oct 2006 03:07:31 +0000 (03:07 +0000)]
Sleep until recent_cpu actually decays.
Ben Pfaff [Thu, 5 Oct 2006 03:05:40 +0000 (03:05 +0000)]
Add hints about not doing too much work in timer interrupt.
Ben Pfaff [Thu, 5 Oct 2006 02:20:10 +0000 (02:20 +0000)]
Fix message.
From Godmar Back.
Ben Pfaff [Thu, 5 Oct 2006 01:25:38 +0000 (01:25 +0000)]
When out of memory+swap, just panic the kernel.
Ben Pfaff [Thu, 5 Oct 2006 01:14:14 +0000 (01:14 +0000)]
Add -O to CFLAGS to try to catch uninitialized variable errors.