Bug 34917

	Kernel panics at inconsistent intervals, no core dump. Not tied to any
	specific process (happened once w/screen saver, once with httpd, nfs,
	et.) Identical versions of kernel build, minus only SMP and APIC 
	kernconf options do not exhibit behavior. Tried resyncing source tree
	via CVSup and making world, with identical results. Probelm exists on
	two virtually identical SMP machines. Kernconf file follows:

machine         i386
cpu             I686_CPU
ident           GWKERNEL
maxusers        0
options         MATH_EMULATE            #Support for x87 emulation
options         INET                    #InterNETworking
options         INET6                   #IPv6 communications protocols
options         FFS                     #Berkeley Fast Filesystem
options         FFS_ROOT                #FFS usable as root device [keep this!]
options         SOFTUPDATES             #Enable FFS soft updates support
options         UFS_DIRHASH             #Improve performance on big directories
options         MFS                     #Memory Filesystem
options         MD_ROOT                 #MD is a potential root device
options         NFS                     #Network Filesystem
options         NFS_ROOT                #NFS usable as root device, NFS required
options         CD9660                  #ISO 9660 Filesystem
options         CD9660_ROOT             #CD-ROM usable as root, CD9660 required
options         COMPAT_43               #Compatible with BSD 4.3 [KEEP THIS!]
options         SCSI_DELAY=15000        #Delay (in ms) before probing SCSI
options         UCONSOLE                #Allow users to grab the console
options         USERCONFIG              #boot -c editor
options         VISUAL_USERCONFIG       #visual boot -c editor
options         KTRACE                  #ktrace(1) support
options         SYSVSHM                 #SYSV-style shared memory
options         SYSVMSG                 #SYSV-style message queues
options         SYSVSEM                 #SYSV-style semaphores
options         P1003_1B                #Posix P1003_1B real-time extensions
options         _KPOSIX_PRIORITY_SCHEDULING
options         ICMP_BANDLIM            #Rate limit bad replies
options         KBD_INSTALL_CDEV        # install a CDEV entry in /dev
options         SMP                     # Symmetric MultiProcessor Kernel
options         APIC_IO                 # Symmetric (APIC) I/O
device          isa
device          pci
device          fdc0    at isa? port IO_FD1 irq 6 drq 2
device          fd0     at fdc0 drive 0
device          ata0    at isa? port IO_WD1 irq 14
device          ata1    at isa? port IO_WD2 irq 15
device          ata
device          atadisk                 # ATA disk drives
device          atapicd                 # ATAPI CDROM drives
device          atapifd                 # ATAPI floppy drives
device          atapist                 # ATAPI tape drives
options         ATA_STATIC_ID           #Static device numbering
device          ahc             # AHA2940 and onboard AIC7xxx devices
device          aha0    at isa?
device          aic0    at isa?
device          scbus           # SCSI bus (required)
device          da              # Direct Access (disks)
device          sa              # Sequential Access (tape etc)
device          cd              # CD
device          pass            # Passthrough device (direct SCSI access)
device          asr             # DPT SmartRAID V, VI and Adaptec SCSI RAID
device          dpt             # DPT Smartcache - See LINT for options!
device          aac             # Adaptec FSA RAID, Dell PERC2/PERC3
device          atkbdc0 at isa? port IO_KBD
device          atkbd0  at atkbdc? irq 1 flags 0x1
device          psm0    at atkbdc? irq 12
device          vga0    at isa?
pseudo-device   splash
device          sc0     at isa? flags 0x100
device          npx0    at nexus? port IO_NPX irq 13
device          sio0    at isa? port IO_COM1 flags 0x10 irq 4
device          sio1    at isa? port IO_COM2 irq 3
device          sio2    at isa? disable port IO_COM3 irq 5
device          sio3    at isa? disable port IO_COM4 irq 9
device          ppc0    at isa? irq 7
device          ppbus           # Parallel port bus (required)
device          plip            # TCP/IP over parallel
device          ppi             # Parallel port interface device
device          txp             # 3Com 3cR990 (``Typhoon'')
device          vx              # 3Com 3c590, 3c595 (``Vortex'')
device          miibus          # MII bus support
device          dc              # DEC/Intel 21143 and various workalikes
device          fxp             # Intel EtherExpress PRO/100B (82557, 82558)
device          pcn             # AMD Am79C97x PCI 10/100 NICs
device          xl              # 3Com 3c90x (``Boomerang'', ``Cyclone'')
device          bge             # Broadcom BCM570x (``Tigon III'')
device          ed0     at isa? port 0x280 irq 10 iomem 0xd8000
device          fe0     at isa? port 0x300
device          awi
pseudo-device   loop            # Network loopback
pseudo-device   ether           # Ethernet support
pseudo-device   pty             # Pseudo-ttys (telnet etc)
pseudo-device   md              # Memory "disks"

Fix: 

Using the GENERIC release kernel.
How-To-Repeat: 	Unknown