Greetings,

A server of mine kernel panicked and in the serial console it prints non stop 
these messages which
are repeated again and again..

KDB: stack backtrace:
#0 0xffffffff802fec5e at kdb_backtrace+0x5e
#1 0xffffffff80287e57 at hardclock+0x117
#2 0xffffffff804610a2 at lapic_handle_timer+0xd2
#3 0xffffffff8045b22d at Xtimerint+0x8d
#4 0xffffffff802e07d5 at softclock+0x305
#5 0xffffffff802a4bc4 at intr_event_execute_handlers+0x104
#6 0xffffffff802a6255 at ithread_loop+0x95
#7 0xffffffff802a1f4f at fork_exit+0x11f
#8 0xffffffff8045ab9e at fork_trampoline+0xe
interrupt                   total
irq1: atkbd0                           1
irq4: uart0                         7376
irq14: ata0                            1
irq18: atapci2                   1237165
irq20: em0                         86529
cpu0: timer                    232803254
cpu1: timer                    248008646
cpu2: timer                    248008707
cpu3: timer                    248008856
Total                   978160831
KDB: stack backtrace:




The server is:

8.2-STABLE FreeBSD 8.2-STABLE #1: Mon Jan 16 15:54:50
CPU: Intel(R) Xeon(TM) CPU 3.40GHz (3391.52-MHz K8-class CPU)
  Origin = "GenuineIntel"  Id = 0xf4a  Family = f  Model = 4  Stepping = 10
  
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0x649d<SSE3,DTES64,MON,DS_CPL,EST,CNXT-ID,CX16,xTPR>
  AMD Features=0x20100800<SYSCALL,NX,LM>
  AMD Features2=0x1<LAHF>
  TSC: P-state invariant
real memory  = 8589934592 (8192 MB)
avail memory = 8243830784 (7861 MB)


This machine will be rebooted on Monday, so from the time being I can only 
watch these messages repeated
again and again. This server is mainly used for virtualization (virtualbox) and 
has ZFS, on a Sil 3112 and
Intel 6300ESB SATA150 Controllers. I think that either the Sil controller or 
memory exhaustion due to ZFS and
virtualbox has occured.


How can I figure out what has really happened? Can I issue any command from the 
serial console?



Thank you
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