syncer panic

Hi all,

I'm running 5.1-RELEASE-p10 (i386) and I've been experiencing kernel
panics for a while now. I'm hoping someone will be able to shed a
bit of light on the problem.

Unfortunately all the info I have right now is:

----
Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x14
fault code              = supervisor write, page not present
instruction pointer     = 0x8:0xc0166429
stack pointer           = 0x10:0xd60359cc
frame pointer           = 0x10:0xd6035a00
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         = 27 (syncer)
trap number             = 12

syncing disks, buffers remaining... panic: free locked buf
----

I've now recompiled my kernel with -g, and setup a dumpdev so I'll get
a dump next time round.

If it's of significance I'm running vinum to mirror my /, /usr, and
swap partitions.

Thanks for any help you can give,
Tim.

-- 
Tim Bishop
http://www.bishnet.net/tim
PGP Key: 0x5AE7D984