[issue2072] Fatal trap 12: stopped at lwkt_send_ipiq3

Rumko (via DragonFly issue tracker) sinknull at leaf.dragonflybsd.org
Sun May 15 11:59:08 PDT 2011

New submission from Rumko <rumcic at gmail.com>:

I'm not able to provide a coredump (no swap usable for dumping), so here's just
the panic msg + trace ... hopefully this will be enough.

hammer: debug: forcing async flush ip 00000001c9446ebc
hammer: debug: forcing async flush ip 00000001c9446ebc
hammer: debug: forcing async flush ip 00000001c9446ebc

Fatal trap 12: page fault while in kernel mode
cpuid = 0; lapic.id = 00000000
fault virtual address	= 0x1b3f008
fault code		= supervisor read, page not present
instruction pointer	= 0x8:0xc020fc01
stack pointer	        = 0x10:0xd2e83cd4
frame pointer	        = 0x10:0xd2e83cf0
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, def32 1, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= Idle
current thread          = pri 14 (CRIT)
 <- SMP: XXX
kernel: type 12 trap, code=0

CPU0 stopping CPUs: 0x00000002
Stopped at      lwkt_send_ipiq3+0xa6:   movl    0x8(%ebx),%eax
db> trace
lwkt_send_ipiq3(deadc0de,c021ba30,c3b8db00,0,c05350a0) at lwkt_send_ipiq3+0xa6
callout_stop(c3b8db00,c01ecb55,c3d4c3c8,d355a558,c05350a0) at callout_stop+0xfc
callout_reset(c3b8db00,1,c01ecb5b,d355a558,fff77842) at callout_reset+0x6f
filt_timerexpire(d355a558,0,0,c05350b4,d2e52778) at filt_timerexpire+0x8a
softclock_handler(c05350a0,0,0,0,0) at softclock_handler+0x13a
lwkt_exit() at lwkt_exit

The kernel is from varound 11th May and I have updated the machine to latest
master so we will see if it still panics or not.
DragonFly v2.11.0.168.g8a70e-DEVELOPMENT (MYROUTER) #0: Wed May 11 13:17:39 CEST

messages: 9902
nosy: rumcic
priority: bug
status: unread
title: Fatal trap 12: stopped at lwkt_send_ipiq3

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