Date: Thu, 14 Dec 1995 20:45:26 -0800 From: deborah@microunity.com (Deborah Gronke Bennett) To: bugs@freebsd.org Cc: gmo@microunity.com Subject: vm_object_deallocate panic in FreeBSD 2.0.5 Message-ID: <9512142045.ZM12001@gallifrey.microunity.com>
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Here is my configuration:
Gateway 2000 P5-90 PC
Triton Chipset on motherboard
ATI GX Mach64 Graphics Card
IDE CD-ROM
1 GB IDE disk
PS/2 Mouse
Dell UltraScan monitor
The PC is installed with FreeBSD 2.0.5 from a local network image
taken from the CD-ROM. It has a kern-developer install plus DES.
It does not have XFree86 installed locally, but there is a full
image of the usr/X11R6 tree on an auspex server. This machine has
been running reliably with 2.0.5 for a while (several months) and has
mostly been used to debug a device driver for an ISA card. When I
found this bug, neither the device driver nor the card it controls are
present on the PC in question.
I recently have been testing a setup to run X11 on this PC without installing
XFree86 locally. In the process, I seem to have run across a bug which shows
up in vm_object_deallocate.
Here's the stack traceback from DDB:
panic: vm_object_deallocate: object deallocated too many times
Debugger("panic")
Stopped at _Debugger+0x2b: movb $0,_in_Debugger.110
db> trace
_Debugger(f011657b,f0116570,f018dc4b,efbffe9c,f072c700) at _Debugger+0x2b
_panic(f018dc4b,f072ba80,0,f0726d00,efbffed0) at _panic+0x3b
_vm_object_deallocate(f072c700,f0726d00,f0730a40,f01e618c,f072ba80) at
_vm_object_deallocate+0x21
_vn_close(f072ba80,1,f0727280,f0726d00,efbfff34) at _vn_close+0x70
_vn_closefile(f0730a40,f0726d00,f0725d00,4,f0726d00) at _vn_closefile+0x19
_closef(f0730a40,f0726d00,f01e7300,f0726d00,1) at _closef+0x12c
_close(f0726d00,efbfff94,efbfff8c,8136060,b49) at _close+0x83
_syscall(27,27,3b000,b49,efbfd6c0) at _syscall+0xfb
Bad user frame pointer: 0xefbfd6c0
db>
Here's how I caused the problem:
Build a GENERIC kernel, and add these options:
options COMCONSOLE #prefer serial console to video
console
options DDB
options BREAK_TO_DEBUGGER #a BREAK on a comconsole goes to
#DDB, if available.
device psm0 at isa? port "IO_KBD" conflicts tty irq 12 vector
psmintr
(I need psm0 because of my mouse type. I need COMCONSOLE because after the
X server causes the crash, any DDB output won't go to the graphics console.
I added BREAK_TO_DEBUGGER in case the problem was not a crash but a hang.)
Boot this GENERIC_SERIAL kernel.
Log in as root.
Setenv path /usr/X11/bin:$PATH
startx
(the grey screen is painted, and the X cursor appears in the middle.
no windows appear, and the cursor won't move)
/usr/X11 is a symlink to /usr/X11R6. /usr/X11R6 is mounted from our
auspex server, not through an automounter, but from the /etc/fstab file.
The only changes to usr/X11R6 on the server are the link from
usr/X11R6/bin/X to usr/X11R6/bin/XF86_Mach64, and the presence of
the XF86Config file in usr/X11R6/lib/X11.
Another note: a similar machine (a Gateway 133MHz pentium, same motherboard,
same graphics, but SCSI disk and CD-ROM and SCSI tape) will run
with the exact same XF86Config file and a locally installed copy of
XFree86 with no problems.
Here is the contents of my XF86Config file:
# File generated by xf86config.
#
# Copyright (c) 1994 by The XFree86 Project, Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE XFREE86 PROJECT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
# OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
#
# Except as contained in this notice, the name of the XFree86 Project shall
# not be used in advertising or otherwise to promote the sale, use or other
# dealings in this Software without prior written authorization from the
# XFree86 Project.
#
# **********************************************************************
# Refer to the XF86Config(4/5) man page for details about the format of
# this file.
# **********************************************************************
# **********************************************************************
# Files section. This allows default font and rgb paths to be set
# **********************************************************************
Section "Files"
# The location of the RGB database. Note, this is the name of the
# file minus the extension (like ".txt" or ".db"). There is normally
# no need to change the default.
RgbPath "/usr/X11R6/lib/X11/rgb"
# Multiple FontPath entries are allowed (which are concatenated together),
# as well as specifying multiple comma-separated entries in one FontPath
# command (or a combination of both methods)
#
# If you don't have a floating point coprocessor and emacs, Mosaic or other
# programs take long to start up, try moving the Type1 and Speedo directory
# to the end of this list (or comment them out).
#
FontPath "/usr/X11R6/lib/X11/fonts/misc/"
FontPath "/usr/X11R6/lib/X11/fonts/Type1/"
FontPath "/usr/X11R6/lib/X11/fonts/Speedo/"
FontPath "/usr/X11R6/lib/X11/fonts/75dpi/"
FontPath "/usr/X11R6/lib/X11/fonts/100dpi/"
EndSection
# **********************************************************************
# Server flags section.
# **********************************************************************
Section "ServerFlags"
# Uncomment this to cause a core dump at the spot where a signal is
# received. This may leave the console in an unusable state, but may
# provide a better stack trace in the core dump to aid in debugging
# NoTrapSignals
# Uncomment this to disable the <Crtl><Alt><BS> server abort sequence
# This allows clients to receive this key event.
# DontZap
# Uncomment this to disable the <Crtl><Alt><KP_+>/<KP_-> mode switching
# sequences. This allows clients to receive these key events.
# DontZoom
EndSection
# **********************************************************************
# Input devices
# **********************************************************************
# **********************************************************************
# Keyboard section
# **********************************************************************
Section "Keyboard"
Protocol "Standard"
# when using XQUEUE, comment out the above line, and uncomment the
# following line
# Protocol "Xqueue"
AutoRepeat 500 5
# Let the server do the NumLock processing. This should only be required
# when using pre-R6 clients
# ServerNumLock
# Specifiy which keyboard LEDs can be user-controlled (eg, with xset(1))
# Xleds 1 2 3
# To set the LeftAlt to Meta, RightAlt key to ModeShift,
# RightCtl key to Compose, and ScrollLock key to ModeLock:
# LeftAlt Meta
# RightAlt ModeShift
# RightCtl Compose
# ScrollLock ModeLock
EndSection
# **********************************************************************
# Pointer section
# **********************************************************************
Section "Pointer"
Protocol "PS/2"
Device "/dev/psm0"
# When using XQUEUE, comment out the above two lines, and uncomment
# the following line.
# Protocol "Xqueue"
# Baudrate and SampleRate are only for some Logitech mice
# BaudRate 9600
# SampleRate 150
# Emulate3Buttons is an option for 2-button Microsoft mice
Emulate3Buttons
# ChordMiddle is an option for some 3-button Logitech mice
# ChordMiddle
EndSection
# **********************************************************************
# Monitor section
# **********************************************************************
# Any number of monitor sections may be present
Section "Monitor"
Identifier "Vivitron_1776"
VendorName "Vivitron"
ModelName "1776"
# Bandwidth is in MHz unless units are specified
# Bandwidth 25.2
# HorizSync is in kHz unless units are specified.
# HorizSync may be a comma separated list of discrete values, or a
# comma separated list of ranges of values.
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY. REFER TO YOUR MONITOR'S
# USER MANUAL FOR THE CORRECT NUMBERS.
HorizSync 31.5 - 64.3
# HorizSync 30-64 # multisync
# HorizSync 31.5, 35.2 # multiple fixed sync frequencies
# HorizSync 15-25, 30-50 # multiple ranges of sync frequencies
# VertRefresh is in Hz unless units are specified.
# VertRefresh may be a comma separated list of discrete values, or a
# comma separated list of ranges of values.
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY. REFER TO YOUR MONITOR'S
# USER MANUAL FOR THE CORRECT NUMBERS.
VertRefresh 50-120
# Modes can be specified in two formats. A compact one-line format, or
# a multi-line format.
# These two are equivalent
# ModeLine "1024x768i" 45 1024 1048 1208 1264 768 776 784 817 Interlace
# Mode "1024x768i"
# DotClock 45
# HTimings 1024 1048 1208 1264
# VTimings 768 776 784 817
# Flags "Interlace"
# EndMode
# This is a set of standard mode timings. Modes that are out of monitor spec
# are automatically deleted by the server (provided the HorizSync and
# VertRefresh lines are correct), so there's no immediate need to
# delete mode timings (unless particular mode timings don't work on your
# monitor). With these modes, the best standard mode that your monitor
# and video card can support for a given resolution is automatically
# used.
# 640x400 @ 70 Hz, 31.5 kHz hsync
Modeline "640x400" 25.175 640 664 760 800 400 409 411 450
# 640x480 @ 60 Hz, 31.5 kHz hsync
Modeline "640x480" 25.175 640 664 760 800 480 491 493 525
# 800x600 @ 56 Hz, 35.15 kHz hsync
ModeLine "800x600" 36 800 824 896 1024 600 601 603 625
# 1024x768 @ 87 Hz interlaced, 35.5 kHz hsync
Modeline "1024x768" 44.9 1024 1048 1208 1264 768 776 784 817 Interlace
# 640x480 @ 72 Hz, 36.5 kHz hsync
Modeline "640x480" 31.5 640 680 720 864 480 488 491 521
# 800x600 @ 60 Hz, 37.8 kHz hsync
Modeline "800x600" 40 800 840 968 1056 600 601 605 628 +hsync
+vsync
# 800x600 @ 72 Hz, 48.0 kHz hsync
Modeline "800x600" 50 800 856 976 1040 600 637 643 666 +hsync
+vsync
# 1024x768 @ 60 Hz, 48.4 kHz hsync
Modeline "1024x768" 65 1024 1032 1176 1344 768 771 777 806 -hsync
-vsync
# 1024x768 @ 70 Hz, 56.5 kHz hsync
Modeline "1024x768" 75 1024 1048 1184 1328 768 771 777 806 -hsync
-vsync
# 1280x1024 @ 87 Hz interlaced, 51 kHz hsync
Modeline "1280x1024" 80 1280 1296 1512 1568 1024 1025 1037 1165 Interlace
# 1024x768 @ 76 Hz, 62.5 kHz hsync
Modeline "1024x768" 85 1024 1032 1152 1360 768 784 787 823
# 1280x1024 @ 61 Hz, 64.2 kHz hsync
Modeline "1280x1024" 110 1280 1328 1512 1712 1024 1025 1028 1054
# 1280x1024 @ 74 Hz, 78.85 kHz hsync
Modeline "1280x1024" 135 1280 1312 1456 1712 1024 1027 1030 1064
# Low-res Doublescan modes
# If your chipset does not support doublescan, you get a 'squashed'
# resolution like 320x400.
# 320x200 @ 70 Hz, 31.5 kHz hsync, 8:5 aspect ratio
Modeline "320x200" 12.588 320 336 384 400 200 204 205 225
Doublescan
# 320x240 @ 60 Hz, 31.5 kHz hsync, 4:3 aspect ratio
Modeline "320x240" 12.588 320 336 384 400 240 245 246 262
Doublescan
# 320x240 @ 72 Hz, 36.5 kHz hsync
Modeline "320x240" 15.750 320 336 384 400 240 244 246 262
Doublescan
# 400x300 @ 56 Hz, 35.2 kHz hsync, 4:3 aspect ratio
ModeLine "400x300" 18 400 416 448 512 300 301 602 312
Doublescan
# 400x300 @ 60 Hz, 37.8 kHz hsync
Modeline "400x300" 20 400 416 480 528 300 301 303 314
Doublescan
# 400x300 @ 72 Hz, 48.0 kHz hsync
Modeline "400x300" 25 400 424 488 520 300 319 322 333
Doublescan
# 480x300 @ 56 Hz, 35.2 kHz hsync, 8:5 aspect ratio
ModeLine "480x300" 21.656 480 496 536 616 300 301 302 312
Doublescan
# 480x300 @ 60 Hz, 37.8 kHz hsync
Modeline "480x300" 23.890 480 496 576 632 300 301 303 314
Doublescan
# 480x300 @ 63 Hz, 39.6 kHz hsync
Modeline "480x300" 25 480 496 576 632 300 301 303 314
Doublescan
# 480x300 @ 72 Hz, 48.0 kHz hsync
Modeline "480x300" 29.952 480 504 584 624 300 319 322 333
Doublescan
EndSection
# **********************************************************************
# Graphics device section
# **********************************************************************
# Any number of graphics device sections may be present
# Standard VGA Device:
Section "Device"
Identifier "Generic VGA"
VendorName "Unknown"
BoardName "Unknown"
Chipset "generic"
# VideoRam 256
# Clocks 25.2 28.3
EndSection
# Sample Device for accelerated server:
# Section "Device"
# Identifier "Actix GE32+ 2MB"
# VendorName "Actix"
# BoardName "GE32+"
# Ramdac "ATT20C490"
# Dacspeed 110
# Option "dac_8_bit"
# Clocks 25.0 28.0 40.0 0.0 50.0 77.0 36.0 45.0
# Clocks 130.0 120.0 80.0 31.0 110.0 65.0 75.0 94.0
# EndSection
# Device configured by xf86config:
Section "Device"
Identifier "ATI_GX_Mach64"
VendorName "ATI"
BoardName "GX_Mach64"
#VideoRam 2048
Clocks 50.35 56.64 63.00 72.00 40.00 44.90 49.50 50.00
Clocks 0.00 110.00 126.00 135.00 0.00 80.00 75.00 65.00
Clocks 25.18 28.32 31.50 36.00 20.00 22.45 24.75 25.00
Clocks 0.00 55.00 63.00 67.50 0.00 40.00 37.50 32.50
EndSection
# **********************************************************************
# Screen sections
# **********************************************************************
# The Colour SVGA server
Section "Screen"
Driver "svga"
Device "Generic VGA"
#Device "ATI_GX_Mach64"
Monitor "Vivitron_1776"
Subsection "Display"
Depth 8
#Modes "1280x1024" "1024x768" "800x600" "640x480"
ViewPort 0 0
Virtual 320 200
#Virtual 1280 1024
EndSubsection
EndSection
# The 16-color VGA server
Section "Screen"
Driver "vga16"
Device "Generic VGA"
Monitor "Vivitron_1776"
Subsection "Display"
Modes "640x480" "800x600"
ViewPort 0 0
Virtual 800 600
EndSubsection
EndSection
# The Mono server
Section "Screen"
Driver "vga2"
Device "Generic VGA"
Monitor "Vivitron_1776"
Subsection "Display"
Modes "640x480" "800x600"
ViewPort 0 0
Virtual 800 600
EndSubsection
EndSection
# The accelerated servers (S3, Mach32, Mach8, 8514, P9000, AGX, W32, Mach64)
Section "Screen"
Driver "accel"
Device "ATI_GX_Mach64"
Monitor "Vivitron_1776"
Subsection "Display"
Depth 8
Modes "1280x1024" "1024x768" "800x600" "640x480"
ViewPort 0 0
Virtual 1280 1024
EndSubsection
Subsection "Display"
Depth 16
Modes "1024x768" "800x600" "640x480"
ViewPort 0 0
Virtual 1024 768
EndSubsection
Subsection "Display"
Depth 32
Modes "800x600" "640x480"
ViewPort 0 0
Virtual 800 600
EndSubsection
EndSection
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