panic in vfs_lookup/kern_statat_vnhook?
John Baldwin
jhb at freebsd.org
Tue May 22 20:41:15 UTC 2012
On Tuesday, May 22, 2012 2:36:06 pm Ian FREISLICH wrote:
> Hi
>
> I've had quite a few reproduceable panics that look to be VFS
> related. The trigger is relatively heavy concurrent disk IO.
> I can trigger it easily two ways:
>
> 1. running my backup script which essentially does:
> cd /; rsync --one-file-system --delete -aHv . /backup
> cd /tmp; rsync --one-file-system --delete -aHv . /backup/tmp
> cd /usr; rsync --one-file-system --delete -aHv . /backup/usr
> cd /var; rsync --one-file-system --delete -aHv . /backup/var
>
> 2. While updating with cvsup or csup, launch firefox.
>
> Both reliably provoke the panic:
>
> #0 doadump (textdump=1) at pcpu.h:244
> #1 0xc06aa895 in kern_reboot (howto=260)
> at /usr/src/sys/kern/kern_shutdown.c:454
> #2 0xc06aad36 in panic (fmt=Variable "fmt" is not available.
> ) at /usr/src/sys/kern/kern_shutdown.c:642
> #3 0xc087adee in trap_fatal (frame=0xedb365c8, eva=28)
> at /usr/src/sys/i386/i386/trap.c:1022
> #4 0xc087aed8 in trap_pfault (frame=0xedb365c8, usermode=0, eva=28)
> at /usr/src/sys/i386/i386/trap.c:875
> #5 0xc087bc4d in trap (frame=0xedb365c8) at /usr/src/sys/i386/i386/trap.c:546
> #6 0xc086687c in calltrap () at /usr/src/sys/i386/i386/exception.s:169
> #7 0xc0878682 in pmap_enter (pmap=0xc09e4060, va=3359633408, access=7 '\a',
> m=0xc3073f70, prot=7 '\a', wired=1) at /usr/src/sys/i386/i386/pmap.c:1596
This is the actual panic. Can you go to this frame? The VFS bits don't
matter, the pmap code blew up trying to malloc another vnode.
> This same panic was reported some time back in:
> Subject: [panic] zfs_zget() panic during 'svn update'
> From: Glen Barber <gjb at FreeBSD.org>
> Date: Thu, 17 May 2012 16:18:51 -0400
> To: freebsd-current at FreeBSD.org
>
> http://people.freebsd.org/~gjb/zfs_zget-panic.kgdb.txt
This is a completely different and (AFAICT) unrelated panic.
--
John Baldwin
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