Panic in "thread taskq" on RELENG_6

[Markus Oestreicher]

Good Day,

I get a panic on latest RELENG_6 every 6-12 hours. The server is a
Dual Xeon FSB800 with 2 GB RAM and aac(4)-disks running postfix and
amavisd-new for SPAM scanning.


kernel trap 12 with interrupts disabled

Fatal trap 12: page fault while in kernel mode
cpuid = 3; apic id = 07
fault virtual address 	= 0x104
fault code		= supervisor read, page not present
instruction pointer	= 0x20:0xc06774e1
stack pointer		= 0x28:0xe4f93c90
frame pointer		= 0x28:0xe4f93c9c
code segment		= base 0x0, limit 0xfffff, type 0x1b
				= DPL 0, pres 1, def32 1, gran 1
processor eglags		= resume, IOPL = 0
current process		= 5 (thread taskq)

The panic always in process "thread taskq".

db>trace
_mit_lock_sleep(cb031e5c,c63f7180) at _mtx_lock_sleep+0x9d
unp_gc(0,1) at uno_gc+0x222
taskqueue_run(c6439d80) at taskqueue_run+0x13f
taskqueue_thread_loop(c09f8988,e4f93d38) at taskqueue_thread_loop+0x92
fork_exit(c06a1bc0,c09f8988,e4f93d38) at fork_exit+0x71
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp=0xe4f93d6c, ebp = 0

FreeBSD mx.local 6.2-PRERELEASE FreeBSD 6.2-PRERELEASE #1: 
 Tue Nov 28 02:12:58 CET 2006     
 root at mx.local:/usr/obj/usr/src/sys/SMP  i386


Does that look like a hardware problem or a software issue?
I will try to swap RAM in the next few days.


Best Regards,
Markus