Date: Sun, 25 May 2008 21:28:36 -0400 From: "Andrew Edwards" <aedwards@sandvine.com> To: <freebsd-net@freebsd.org> Subject: panic in nfsd in freebsd7-release and -stable Message-ID: <5230D3C40B842D4F9FB3CD368021BEF7020107F1@exchange-2.sandvine.com>
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I have a system that was running some version of redhat (I don't
remember now) and I upgraded it to freebsd7 and I would get an immediate
panic when nfsd is started. I then updated to 7-stable (on May 24th)
and built a new kerenl and userland and the panic continued.=20
This was happening 100% of the time whenever nfsd is started but what I
later discovered was that because I had used the same IP's as the linux
host there were some systems that still had a filesystem mounted from
before the conversion. I put in an ipfw rule to block those hosts and
then I was able to start nfsd without crashing and then create new
mounts. I have been able to work-around the issue by forcing all of the
servers that were mounting from the linux os to remount, I am only
including this information just in case someone else runs into a similar
problem.
Thanks,
Andrew
Here's the backtrace
Fatal trap 12: page fault while in kernel mode
cpuid =3D 1; apic id =3D 06
fault virtual address =3D 0x18
fault code =3D supervisor read, page not present
instruction pointer =3D 0x20:0xc06ce915
stack pointer =3D 0x28:0xe8f32a48
frame pointer =3D 0x28:0xe8f32a64
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 755 (nfsd)
trap number =3D 12
panic: page fault
cpuid =3D 1
Uptime: 40m22s
Physical memory: 3318 MB
Dumping 93 MB: 78 62 46 30 14
#0 doadump () at pcpu.h:195
195 pcpu.h: No such file or directory.
in pcpu.h
(kgdb) bt
#0 doadump () at pcpu.h:195
#1 0xc069a917 in boot (howto=3D260) at
/usr/src/sys/kern/kern_shutdown.c:418
#2 0xc069ac13 in panic (fmt=3DVariable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:572
#3 0xc0926763 in trap_fatal (frame=3D0xe8f32a08, eva=3D24)
at /usr/src/sys/i386/i386/trap.c:899
#4 0xc09270ff in trap (frame=3D0xe8f32a08) at
/usr/src/sys/i386/i386/trap.c:280
#5 0xc090c84b in calltrap () at /usr/src/sys/i386/i386/exception.s:139
#6 0xc06ce915 in turnstile_broadcast (ts=3D0x0, queue=3D0)
at /usr/src/sys/kern/subr_turnstile.c:835
#7 0xc068d292 in _mtx_unlock_sleep (m=3D0xc0a47e10, opts=3D0, =
file=3D0x0,
line=3D0)
at /usr/src/sys/kern/kern_mutex.c:611
#8 0xc0849b79 in nfsrv3_access (nfsd=3D0xc6ba5d00, slp=3D0xc6b7f700,
td=3D0xc6856c60, mrq=3D0xe8f32c58) at
/usr/src/sys/nfsserver/nfs_serv.c:253
#9 0xc085bc71 in nfssvc (td=3D0xc6856c60, uap=3D0xe8f32cfc)
at /usr/src/sys/nfsserver/nfs_syscalls.c:461
#10 0xc0926d35 in syscall (frame=3D0xe8f32d38)
at /usr/src/sys/i386/i386/trap.c:1035
#11 0xc090c8b0 in Xint0x80_syscall ()
at /usr/src/sys/i386/i386/exception.s:196
#12 0x00000033 in ?? ()
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