On 11 Oct, Steve Kargl wrote:
> Upgrade tonight (7pm PST) and received the following
> on rebooting
> panic: pmap_zero_page: CMAP3 busy
> Unfortunately, this system does not have a serial
> console and the panic locked it up tight.  Only
> a hard reset brought the system back.

I was just about to type "make installworld" when I got this message

I checked the commit logs and didn't see any recent commits that looked
suspicious, and since I do have a serial console I decided to throw
caution to the wind and give the new kernel a try.

Other than an annoyingly long pause while GEOM waits for my SCSI cdrom
drive to figure out that it is empty (which has been noted in another
thread), my system booted without any problems.  My kernel has
everything commited to the present time except:

tjr         2003/10/11 21:25:26 PDT

  FreeBSD src repository

  Modified files:
    sys/i386/ibcs2       ibcs2_misc.c ibcs2_signal.c
                         ibcs2_socksys.c ibcs2_util.c ibcs2_util.h
  Fix a multitude of security bugs in the iBCS2 emulator:
  - Return NULL instead of returning memory outside of the stackgap
    in stackgap_alloc() (FreeBSD-SA-00:42.linux)
  - Check for stackgap_alloc() returning NULL in ibcs2_emul_find();
    other calls to stackgap_alloc() have not been changed since they
    are small fixed-size allocations.
  - Replace use of strcpy() with strlcpy() in exec_coff_imgact()
    to avoid buffer overflow
  - Use strlcat() instead of strcat() to avoid a one byte buffer
    overflow in ibcs2_setipdomainname()
  - Use copyinstr() instead of copyin() in ibcs2_setipdomainname()
    to ensure that the string is null-terminated
  - Avoid integer overflow in ibcs2_setgroups() and ibcs2_setgroups()
    by checking that gidsetsize argument is non-negative and
    no larger than NGROUPS_MAX.
  - Range-check signal numbers in ibcs2_wait(), ibcs2_sigaction(),
    ibcs2_sigsys() and ibcs2_kill() to avoid accessing array past
    the end (or before the start)

  Revision  Changes    Path
  1.52      +21 -3     src/sys/i386/ibcs2/ibcs2_misc.c
  1.32      +7 -2      src/sys/i386/ibcs2/ibcs2_signal.c
  1.19      +5 -3      src/sys/i386/ibcs2/ibcs2_socksys.c
  1.17      +4 -2      src/sys/i386/ibcs2/ibcs2_util.c
  1.17      +4 -1      src/sys/i386/ibcs2/ibcs2_util.h
  1.61      +1 -1      src/sys/i386/ibcs2/imgact_coff.c

Maybe this problem only affects certain hardware.  Here is my dmesg.boot
for comparison:

Copyright (c) 1992-2003 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD 5.1-CURRENT #28: Sat Oct 11 21:58:42 PDT 2003
    [EMAIL PROTECTED]:/usr/obj/usr/src/sys/GENERICSMB
Preloaded elf kernel "/boot/kernel/kernel" at 0xc0a8f000.
Preloaded elf module "/boot/kernel/aout.ko" at 0xc0a8f244.
Preloaded elf module "/boot/kernel/acpi.ko" at 0xc0a8f2f0.
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: AMD Athlon(tm) XP 1900+ (1608.23-MHz 686-class CPU)
  Origin = "AuthenticAMD"  Id = 0x662  Stepping = 2
  AMD Features=0xc0480000<MP,AMIE,DSP,3DNow!>
real memory  = 1073676288 (1023 MB)
avail memory = 1033592832 (985 MB)
Pentium Pro MTRR support enabled
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <GBT    AWRDACPI> on motherboard
pcibios: BIOS version 2.10
Using $PIR table, 11 entries at 0xc00fdc30
acpi0: Power Button (fixed)
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x4008-0x400b on acpi0
acpi_cpu0: <CPU> on acpi0
acpi_button0: <Power Button> on acpi0
acpi_button1: <Sleep Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 
0x6000-0x607f,0x5000-0x500f,0x4080-0x40ff,0x4000-0x407f,0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pcib0: slot 7 INTD is routed to irq 10
pcib0: slot 7 INTD is routed to irq 10
pcib0: slot 10 INTA is routed to irq 11
pcib0: slot 12 INTA is routed to irq 15
agp0: <AMD 761 host to AGP bridge> port 0xc000-0xc003 mem 
0xef020000-0xef020fff,0xe8000000-0xebffffff at device 0.0 on pci0
pcib1: <PCIBIOS PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci_cfgintr: 1:5 INTA BIOS irq 15
pci1: <display, VGA> at device 5.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <VIA 82C686B UDMA100 controller> port 0xc400-0xc40f at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata0: [MPSAFE]
ata1: at 0x170 irq 15 on atapci0
ata1: [MPSAFE]
uhci0: <VIA 83C572 USB controller> port 0xc800-0xc81f irq 10 at device 7.2 on pci0
usb0: <VIA 83C572 USB controller> on uhci0
usb0: USB revision 1.0
uhub0: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhub0: port error, restarting port 1
uhub0: port error, giving up port 1
uhub0: port error, restarting port 2
uhub0: port error, giving up port 2
uhci1: <VIA 83C572 USB controller> port 0xcc00-0xcc1f irq 10 at device 7.3 on pci0
usb1: <VIA 83C572 USB controller> on uhci1
usb1: USB revision 1.0
uhub1: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
uhub1: port error, restarting port 1
uhub1: port error, giving up port 1
uhub1: port error, restarting port 2
uhub1: port error, giving up port 2
viapropm0: SMBus I/O base at 0x5000
viapropm0: <VIA VT82C686A Power Management Unit> port 0x5000-0x500f at device 7.4 on 
viapropm0: SMBus revision code 0x40
smbus0: <System Management Bus> on viapropm0
smb0: <SMBus generic I/O> on smbus0
fxp0: <Intel 82550 Pro/100 Ethernet> port 0xe000-0xe03f mem 
0xef000000-0xef01ffff,0xef021000-0xef021fff irq 11 at device 10.0 on pci0
fxp0: Ethernet address 00:02:b3:5c:8c:e0
miibus0: <MII bus> on fxp0
inphy0: <i82555 10/100 media interface> on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
ahc0: <Adaptec 19160B Ultra160 SCSI adapter> port 0xe400-0xe4ff mem 
0xef022000-0xef022fff irq 15 at device 12.0 on pci0
aic7892: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs
fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> port 0x3f7,0x3f0-0x3f5 
irq 6 drq 2 on acpi0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
sio0 port 0x3f8-0x3ff irq 4 on acpi0
sio0: type 16550A, console
sio1 port 0x2f8-0x2ff irq 3 on acpi0
sio1: type 16550A
ppc0 port 0x778-0x77b,0x378-0x37f irq 7 drq 3 on acpi0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/8 bytes threshold
ppbus0: <Parallel port bus> on ppc0
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model IntelliMouse Explorer, device ID 4
orm0: <Option ROM> at iomem 0xc0000-0xcc7ff on isa0
pmtimer0 on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x100>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounter "TSC" frequency 1608230966 Hz quality 800
Timecounters tick every 10.000 msec
Waiting 3 seconds for SCSI devices to settle
acpi_cpu: throttling enabled, 2 steps (100% to 50.0%), currently 100.0%
GEOM: create disk cd0 dp=0xc6c53e00
GEOM: create disk da0 dp=0xc6a30c50
da0 at ahc0 bus 0 target 0 lun 0
da0: <SEAGATE ST336706LW 010A> Fixed Direct Access SCSI-3 device 
da0: 160.000MB/s transfers (80.000MHz, offset 63, 16bit), Tagged Queueing Enabled
da0: 35003MB (71687370 512 byte sectors: 255H 63S/T 4462C)
cd0 at ahc0 bus 0 target 6 lun 0
cd0: <NEC CD-ROM DRIVE:462 1.14> Removable CD-ROM SCSI-2 device 
cd0: 10.000MB/s transfers (10.000MHz, offset 15)
cd0: Attempt to query device size failed: NOT READY, Medium not present
Mounting root from ufs:/dev/da0s1a

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