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Date: Sat, 23 Oct 2004 04:56:41 +0200
From: Mark Santcroos <marks@ripe.net>
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Subject: panic on 6-CURRENT under high load
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For the record:

While building some ports I got the following panic:
(6.0-CURRENT, UP, SCHED_ULE)

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x50
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc056ecfd
stack pointer           = 0x10:0xd9978c68
frame pointer           = 0x10:0xd9978cec
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         = 44 (pagedaemon)
trap number             = 12
panic: page fault


#0  doadump () at pcpu.h:159
#1  0xc048aa37 in boot (howto=260) at ../../../kern/kern_shutdown.c:385
#2  0xc048ac93 in panic (fmt=0xc05b7c08 "%s")
    at ../../../kern/kern_shutdown.c:541
#3  0xc059e2f4 in trap_fatal (frame=0xd9978c28, eva=80)
    at ../../../i386/i386/trap.c:809
#4  0xc059e04f in trap_pfault (frame=0xd9978c28, usermode=0, eva=80)
    at ../../../i386/i386/trap.c:727
#5  0xc059dcd1 in trap (frame=
      {tf_fs = -644415464, tf_es = -1067909104, tf_ds = -644415472,
tf_edi = 697, tf_esi = 98743, tf_ebp = -644379412, tf_isp = -644379564,
tf_ebx = -1057635720, tf_edx = -1067310384, tf_ecx = -1056188520, tf_eax
= 0, tf_trapno = 12, tf_err = 0, tf_eip = -1068045059, tf_cs = 8,
tf_eflags = 66050, tf_esp = 0, tf_ss = 13})
    at ../../../i386/i386/trap.c:417
#6  0xc0591dea in calltrap () at ../../../i386/i386/exception.s:140
#7  0xd9970018 in ?? ()
#8  0xc0590010 in db_disasm_esc (loc=98743, inst=0, short_addr=0, 
    size=-1067657947, seg=0x59b <Address 0x59b out of bounds>)
    at ../../../i386/i386/db_disasm.c:1048
#9  0xc056f5d3 in vm_pageout () at ../../../vm/vm_pageout.c:1436
#10 0xc047918e in fork_exit (callout=0xc056f310 <vm_pageout>, arg=0x0, 
    frame=0xd9978d48) at ../../../kern/kern_fork.c:807
#11 0xc0591e4c in fork_trampoline () at
../../../i386/i386/exception.s:209

-- 
RIPE NCC - Delft University of Technology - The FreeBSD Project
marks@ripe.net - m.a.santcroos@ewi.tudelft.nl - marks@freebsd.org
http://www.santcroos.net/mark/