Re: Random panics

Ian Freislich wrote:
> Hi
> 
> I get these panics at what appears random intervals and indeterminate
> cause.  Higher load does seem to increase the frequency though.  On
> an unload machine  it might occur this often:

Well, I've figured out what was triggering the panics: mail delivery
- which is why it appears random.

The configuration is somewhat different:
	Exim-3.36-2 with aliases and relay/local domains in a
	PostgreSQL-7.4.1 database.

Running the queue on my backup MX gets this far:
[brane] ~ # exim -d1 -M 1AnyuD-0000vC-00
Exim version 3.36 debug level 1 uid=0 gid=0
probably Berkeley DB version 1.8x (native mode)
delivering message 1AnyuD-0000vC-00
Connecting to brane-dead.freislich.nom.za [196.7.162.29.25] ... connected
  SMTP<< 220 brane-dead.freislich.nom.za ESMTP Exim 3.36 #1 Fri, 06 Feb 2004 15:21:29 +0200
  SMTP>> EHLO brane.freislich.nom.za
^C

Immediately following the EHLO the other server panics with the
message and stack trace below.

kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x24
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc05136de
stack pointer           = 0x10:0xcdb1aab0
frame pointer           = 0x10:0xcdb1aad0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 29 (swi1: net)
trap number             = 12
panic: page fault
at line 819 in file ../../../i386/i386/trap.c
Stack backtrace:
backtrace(c0658db6,c06a4e20,333,c066a433,100) at backtrace+0x17
__panic(c066a433,333,c0648fcf,c066a28b,1) at __panic+0xd4
trap_fatal(cdb1aa70,24,ffffffff,7fffffff,24) at trap_fatal+0x346
trap(10018,c3d00010,10,0,c0fc02a0) at trap+0x123
calltrap() at calltrap+0x5
--- trap 0xc, eip = 0xc05136de, esp = 0xcdb1aab0, ebp = 0xcdb1aad0 ---
propagate_priority(c0fc02a0,c3bad2a0,2,0,c06a6770) at propagate_priority+0x7e
turnstile_wait(0,c06a922c,c3bad2a0,0,0) at turnstile_wait+0x2f4
_mtx_lock_sleep(c06a922c,0,0,0,c0fc71b8) at _mtx_lock_sleep+0xd8
tcp_input(c0fd1700,14,87,c0501fc5,c0fc02a0) at tcp_input+0x31e
ip_input(c0fd1700,de732fb8,c06ad654,0,c06a85b8) at ip_input+0xa8c
netisr_processqueue(c06a85b8,4405b730,e97c9fc4,0,c0fb5840) at netisr_processqueu
e+0xd9
swi_net(0,42fcc,46a54,425ec,c0fc02a0) at swi_net+0xc9
ithread_loop(c0fbd480,cdb1ad48,c5a0,43740,0) at ithread_loop+0x1d8
fork_exit(c04d4c00,c0fbd480,cdb1ad48) at fork_exit+0x80
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xcdb1ad7c, ebp = 0 ---


Ian


--
Ian Freislich