Date: Wed, 18 Apr 2001 12:19:47 +0200 From: Sven Huster <sven.huster@mailsurf.com> To: freebsd-stable@freebsd.org Subject: 4.3-RC mount_null problem on diskless machine Message-ID: <5.1.0.14.0.20010418121945.02580930@mx01.mailsurf.com>
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Hi there,
i got a big problem with mount_null in FreeBSD.
the /etc/rc.diskless* scripts use moun_null to mount their mfs mounted dirs
over /etc and /tmp,
but often when i try to write on /tmp or /etc i get a panic.
like as i tried to temp change the root passwd on the machine
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x6d
fault code = supervisor read, page not present
instruction pointer = 0x8:0x6d
stack pointer = 0x10:0xd03d5c64
frame pointer = 0x10:0xd03d5cf4
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 = 109 (mount_mfs)
interrupt mask = none
kernel: type 12 trap, code=0
Stopped at 0x6d:
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x6d
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc0250388
stack pointer = 0x10:0xd03d5acc
frame pointer = 0x10:0xd03d5ad0
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 = 109 (mount_mfs)
interrupt mask = none
kernel: type 12 trap, code=0
/ is mounted via nfs + /etc/rc.diskless* scripts run normally at startup
i know mount_null is not declared stable (in the man page), but
if its like this why is this thing in /etc/rc.diskless*?
i fixed /tmp by changing it to a symlink, but not 100% sure what to do with
/etc.
test# uname -a
FreeBSD test.mailsurf.com 4.3-RC FreeBSD 4.3-RC #1: Tue Apr 17 12:16:14 GMT
2001 root@test.mailsurf.com:/usr/obj/usr/src/sys/MAILSURF i386
any suggestions?
regards
Sven Huster
Senior IT Systems Administrator
*BSD, Linux, Solaris
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