Date: Fri, 2 Dec 2005 11:00:02 +0100 From: Yuri Khotyaintsev <yuri@irfu.se> To: freebsd-stable@freebsd.org Cc: hackers@freebsd.org Subject: Fatal trap 12: page fault while in kernel mode Message-ID: <200512021100.03167.yuri@irfu.se>
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I have the following panic occurring several times a week. The machine is a=
n=20
NFS server, and it usually panics early in the morning, when first people t=
ry=20
to access it. After reboot it may work OK for 1-2 days, and then panics=20
again. I have tried changing memory and replacing disk which was exported v=
ia=20
NFS, but nothing helped :(
Any suggestion on how to fix this panic will be very much appreciated !=20
/Yuri
[root@XXX][/var/crash]# uname -a
=46reeBSD XXX.irfu.se 6.0-STABLE FreeBSD 6.0-STABLE #0: Tue Nov 29 13:31:15=
CET=20
2005 root@XXX.irfu.se:/usr/obj/usr/src/sys/HEM i386
[root@XXX][/var/crash]# kgdb /usr/obj/usr/src/sys/HEM/kernel.debug vmcore.7
[GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so:=
=20
Undefined symbol "ps_pglobal_lookup"]
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain condition=
s.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-marcel-freebsd".
Unread portion of the kernel message buffer:
kernel trap 12 with interrupts disabled
=46atal trap 12: page fault while in kernel mode
fault virtual address =3D 0x74
fault code =3D supervisor read, page not present
instruction pointer =3D 0x20:0xc053a426
stack pointer =3D 0x28:0xd56c0b88
frame pointer =3D 0x28:0xd56c0b8c
code segment =3D base 0x0, limit 0xfffff, type 0x1b
=3D DPL 0, pres 1, def32 1, gran 1
processor eflags =3D resume, IOPL =3D 0
current process =3D 77 (vnlru)
trap number =3D 12
panic: page fault
Uptime: 2d12h22m11s
Dumping 511 MB (2 chunks)
chunk 0: 1MB (160 pages) ... ok
chunk 1: 511MB (130800 pages) 495 479 463 447 431 415 399 383 367 351 335=
=20
319 303 287 271 255 239 223 207 191 175 159 143 127 111 95 79 63 47 31 15
#0 doadump () at pcpu.h:165
165 pcpu.h: No such file or directory.
in pcpu.h
(kgdb) where
#0 doadump () at pcpu.h:165
#1 0xc051577a in boot (howto=3D260) at /usr/src/sys/kern/kern_shutdown.c:3=
99
#2 0xc0515a84 in panic (fmt=3D0xc06ce475 "%s")=20
at /usr/src/sys/kern/kern_shutdown.c:555
#3 0xc06b4815 in trap_fatal (frame=3D0xd56c0b48, eva=3D0)
at /usr/src/sys/i386/i386/trap.c:836
#4 0xc06b3f2d in trap (frame=3D
{tf_fs =3D 1133445128, tf_es =3D 40, tf_ds =3D 40, tf_edi =3D -101799=
7312,=20
tf_esi =3D -1020120704, tf_ebp =3D -714339444, tf_isp =3D -714339468, tf_eb=
x =3D=20
=2D1012942272, tf_edx =3D -1020120704, tf_ecx =3D 0, tf_eax =3D 0, tf_trapn=
o =3D 12,=20
tf_err =3D 0, tf_eip =3D -1068260314, tf_cs =3D 32, tf_eflags =3D 589831, t=
f_esp =3D=20
=2D1020120704, tf_ss =3D -714339408})
at /usr/src/sys/i386/i386/trap.c:269
#5 0xc06a24fa in calltrap () at /usr/src/sys/i386/i386/exception.s:139
#6 0xc053a426 in turnstile_setowner (ts=3D0xc39fba40, owner=3D0x0)
at /usr/src/sys/kern/subr_turnstile.c:417
#7 0xc053a752 in turnstile_wait (lock=3D0xc461fe00, owner=3D0x0)
at /usr/src/sys/kern/subr_turnstile.c:576
#8 0xc050b511 in _mtx_lock_sleep (m=3D0xc461fe00, tid=3D3274846592, opts=
=3D0,=20
file=3D0x0, line=3D0)
at /usr/src/sys/kern/kern_mutex.c:555
#9 0xc064becd in ufsdirhash_free (ip=3D0xc4a33840)
at /usr/src/sys/ufs/ufs/ufs_dirhash.c:289
#10 0xc064de66 in ufs_reclaim (ap=3D0x0) at /usr/src/sys/ufs/ufs/ufs_inode.=
c:175
#11 0xc06bef38 in VOP_RECLAIM_APV (vop=3D0x0, a=3D0xc3323180) at vnode_if.c=
:1589
#12 0xc057adfe in vgonel (vp=3D0xc3cf3aa0) at vnode_if.h:818
#13 0xc0577530 in vtryrecycle (vp=3D0xc3cf3aa0)=20
at /usr/src/sys/kern/vfs_subr.c:840
#14 0xc0576ec6 in vnlru_free (count=3D1376) at /usr/src/sys/kern/vfs_subr.c=
:668
#15 0xc0577019 in vnlru_proc () at /usr/src/sys/kern/vfs_subr.c:703
#16 0xc04fc310 in fork_exit (callout=3D0xc0576f24 <vnlru_proc>, arg=3D0x0,=
=20
frame=3D0x0)
at /usr/src/sys/kern/kern_fork.c:789
#17 0xc06a255c in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:=
208
(kgdb) quit
=2D-=20
Dr. Yuri Khotyaintsev
Institutet f=F6r rymdfysik (IRF), Uppsala
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