[issue1920] system hangs

[Aleksej Lebedev (via DragonFly issue tracker)]

New submission from Aleksej Lebedev <a at umc8.ru>:

System hangs once in a while leaving on the console these messages:

====
pfr_unroute_kentry: delete failed
pfr_unroute_kentry: delete failed
pfr_unroute_kentry: delete failed
pfr_unroute_kentry: delete failed
pfr_unroute_kentry: delete failed
pfr_unroute_kentry: delete failed
pfr_unroute_kentry: delete failed
pfr_unroute_kentry: delete failed

panic: IP header no in one mbuf
mp_lock = ffffffff; cpuid=1
Trace beginning at frame 0xffffffe03d9b0a60
panic() at panic+0x239
panic() at panic+0x239
ip_input() at ip_input+0x153
ip_input_handler() at ip_input_handler+0xd
netmsg_service_lookp() at netmsg_service_loop_0x6f
Debugger("panic")

CPU1 stopping CPU: 0x00000001
stopped
Stopped at Debugger+0x39 movh $0,0x387060(%rid)
====

I couldn't grub this from the screen and copied it by hands, so there can be typos.

# uname -a
DragonFly chinua.zzz.umc8.ru 2.8-RELEASE DragonFly v2.8.2.38.gb1139-RELEASE #2:
Mon Nov 22 10:06:11 MSK 2010    
root at chinua.zzz.umc8.ru:/usr/obj/usr/src/sys/X86_64_GENERIC_SMP  x86_64

The dmesg.boot is in attach

----------
files: dmesg.boot
messages: 9313
nosy: zhtw
priority: urgent
status: unread
title: system hangs

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DragonFly issue tracker <bugs at lists.dragonflybsd.org>
<http://bugs.dragonflybsd.org/issue1920>
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dmesg.boot
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