Date: Wed, 11 Apr 2001 23:58:32 +0200 From: Sven Huster <sven.huster@mailsurf.com> To: freebsd-stable@freebsd.org Subject: error with mfs Message-ID: <5.0.2.1.0.20010411234537.037a9c70@mx01.mailsurf.com>
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Hi there,
i installed a diskless machine
just after reboot i did:
login: root
Copyright (c) 1980, 1983, 1986, 1988, 1990, 1991, 1993, 1994
The Regents of the University of California. All rights reserved.
test# top -bS
last pid: 355; load averages: 0.12, 0.03, 0.01 up 0+00:00:52 22:55:07
22 processes: 1 running, 21 sleeping
Mem: 6392K Active, 5032K Inact, 7564K Wired, 160K Cache, 6448K Buf, 195M Free
Swap:
PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND
318 root 2 0 2152K 1364K select 0:00 0.00% 0.00% sshd
350 root 18 0 1304K 904K pause 0:00 0.00% 0.00% csh
274 root 2 0 916K 552K select 0:00 0.00% 0.00% syslogd
196 root 10 0 33448K 1364K mfsidl 0:00 0.00% 0.00% mount_mfs
174 root 10 0 1668K 1128K mfsidl 0:00 0.00% 0.00% mount_mfs
313 root 2 0 1044K 724K select 0:00 0.00% 0.00% inetd
355 root 28 0 1856K 884K RUN 0:00 0.00% 0.00% top
1 root 10 0 528K 316K wait 0:00 0.00% 0.00% init
278 root 2 -12 1244K 776K select 0:00 0.00% 0.00% ntpd
315 root 10 0 968K 684K nanslp 0:00 0.00% 0.00% cron
282 root 2 0 908K 588K select 0:00 0.00% 0.00% ypbind
280 daemon 2 0 936K 624K select 0:00 0.00% 0.00% portmap
288 root 10 0 208K 76K nfsidl 0:00 0.00% 0.00% nfsiod
75 root 2 0 516K 348K select 0:00 0.00% 0.00% dhclient
5 root 18 0 0K 0K syncer 0:00 0.00% 0.00% syncer
2 root -18 0 0K 0K psleep 0:00 0.00% 0.00% pagedaemon
0 root -18 0 0K 0K sched 0:00 0.00% 0.00% swapper
4 root -18 0 0K 0K psleep 0:00 0.00% 0.00% bufdaemon
test# mount
/dev/md0c on / (ufs, local)
mfs:174 on /conf/etc (mfs, asynchronous, local)
/conf/etc on /etc (null, local)
procfs on /proc (procfs, local)
mfs:196 on /var (mfs, asynchronous, local)
/var/tmp on /tmp (null, local)
10.254.0.3:/vol/vol0/pxeroot/usr on /usr (nfs, read-only)
10.254.0.3:/vol/vol0/home on /home (nfs)
test# df
Filesystem 1K-blocks Used Avail
Capacity Mounted on
/dev/md0c 34687 23109 11578 67% /
mfs:174 959 816 67 92%
/conf/etc
/conf/etc 959 816 67 92% /etc
procfs 4 4 0 100% /proc
mfs:196 31743 58 29146 0% /var
/var/tmp 31743 58 29146 0% /tmp
10.254.0.3:/vol/vol0/pxeroot/usr 127105232 50518528 76586704 40% /usr
10.254.0.3:/vol/vol0/home 127105232 50518528 76586704 40% /home
test# uname -a
FreeBSD test.mailsurf.com 4.3-BETA FreeBSD 4.3-BETA #1: Fri Mar 9 00:03:34
GMT 2001 root@mnt01.mailsurf.com:/usr/obj/usr/src/sys/MAILSURF i386
test# dd if=/dev/zero of=/tmp/test bs=1m count=10
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0xc4
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc4
stack pointer = 0x10:0xd15e2c64
frame pointer = 0x10:0xd15e2cf4
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 = 196 (mount_mfs)
interrupt mask = none
kernel: type 12 trap, code=0
Stopped at 0xc4:
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0xc4
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc024c370
stack pointer = 0x10:0xd15e2acc
frame pointer = 0x10:0xd15e2ad0
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 = 196 (mount_mfs)
interrupt mask = none
kernel: type 12 trap, code=0
db>
error is reproduceable.
root fs is a mfs root loaded via nfs, machine boot via pxe
machine config according to rc.diskless*
no swap configure, but should be not a problem here.
any suggestions?
regards
Sven Huster
Senior IT Systems Administrator
*BSD, Linux, Solaris
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