Bug 28630

In 7/1 4.3-STABLE, rebuilded kernel are boot up,
But it look like hung up after few minute in multi user mode.
single user mode is always fine.
I do nothing before hunged up.
At hunged up, trying to ping that machine, I can recieve
reply packet.

How-To-Repeat: Only boot.

Copyright (c) 1992-2001 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 4.3-STABLE #1: Mon Jul  2 21:11:08 JST 2001
greg@uzume.greg.rim.or.jp:/export/src/system-4-stable/src/sys/compile/uzume.greg
.rim.or.jp
Timecounter "i8254"  frequency 1193182 Hz
CPU: Pentium III/Pentium III Xeon/Celeron (515.46-MHz 686-class CPU)
Origin = "GenuineIntel"  Id = 0x672  Stepping = 2
Features=0x387fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV
,PAT,PSE36,PN,MMX,FXSR,SSE>
real memory  = 268435456 (262144K bytes)
avail memory = 257908736 (251864K bytes)
Programming 24 pins in IOAPIC #0
IOAPIC #0 intpin 2 -> irq 0
FreeBSD/SMP: Multiprocessor motherboard
cpu0 (BSP): apic id:  0, version: 0x00040011, at 0xfee00000
cpu1 (AP):  apic id:  1, version: 0x00040011, at 0xfee00000
io0 (APIC): apic id:  2, version: 0x00170011, at 0xfec00000
Preloaded elf kernel "kernel" at 0xc036a000.
Pentium Pro MTRR support enabled
md0: Malloc disk
apm0: <APM BIOS> on motherboard
apm: found APM BIOS v1.2, connected at v1.2
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Intel 82443BX (440 BX) host to PCI bridge> on motherboard
IOAPIC #0 intpin 19 -> irq 2
IOAPIC #0 intpin 17 -> irq 10
pci0: <PCI bus> on pcib0
pcib1: <Intel 82443BX (440 BX) PCI-PCI (AGP) bridge> at device 1.0 on pci0
IOAPIC #0 intpin 16 -> irq 11
pci1: <PCI bus> on pcib1
pci1: <NVidia Riva TNT2 graphics accelerator> at 0.0 irq 11
isab0: <Intel 82371AB PCI to ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 ATA33 controller> port 0xf000-0xf00f at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
uhci0: <Intel 82371AB/EB (PIIX4) USB controller> 
port 0xe000-0xe01f irq 2 at device 7.2 on pci0
usb0: <Intel 82371AB/EB (PIIX4) USB controller> on uhci0
usb0: USB revision 1.0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhub1: Texas Instruments TUSB2046 hub, class 9/0, rev 1.10/1.25, addr 2
uhub1: 4 ports with 4 removable, self powered
ums0: Logitech USB-PS/2 Trackball, rev 1.00/2.10, addr 3, iclass 3/1
ums0: 3 buttons and Z dir.
Timecounter "PIIX"  frequency 3579545 Hz
chip1: <Intel 82371AB Power management controller> port 0x5000-0x500f at device 
7.3 on pci0
pcm0: <Yamaha DS-1E (YMF744)> port 0xe800-0xe803,0xe400-0xe43f mem 0xe9100000-0x
e9107fff irq 10 at device 8.0 on pci0
fxp0: Ethernet address 00:d0:b7:0e:58:0a
inphy0: <i82555 10/100 media interface> on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
orm0: <Option ROMs> at iomem 0xc0000-0xcb7ff,0xcc000-0xcdfff,0xd0000-0xd0fff on 
isa0
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/16 bytes threshold
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
IPsec: Initialized Security Association Processing.
SMP: AP CPU #1 Launched!
ata1-slave: ata_command: timeout waiting for intr
ata1-slave: identify failed
ad0: 19470MB <IBM-DJNA-352030> [39560/16/63] at ata0-master UDMA33
acd0: CDROM <FX600T> at ata1-master using PIO3