9.2-BETA2 panics

[Daniel Braniss]

Hi,
this host (used as a zfs server), was working since 8.2, actually was working
nicely under 9.1, but after upgrading to the latest 9.2, it panics, 2 days
in a row. Appart of being a newer version, it's now dataless while I run it
through the loops - which could be the reason for the panics, so while I 
prepare
it to run off a local disk, and see if that mitigates the problem,
could someone take a look?

Fatal trap 12: page fault while in kernel mode
cpuid = 21; apic id = 25
fault virtual address   = 0xfffffffffffffcc0
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff80d17f66
stack pointer           = 0x28:0xffffff8d77b415b0
frame pointer           = 0x28:0xffffff8d77b415f0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 89 (txg_thread_enter)
trap number             = 12
panic: page fault
cpuid = 21
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2a/frame 0xffffff8d77b41040
kdb_backtrace() at kdb_backtrace+0x37/frame 0xffffff8d77b41100
panic() at panic+0x1ce/frame 0xffffff8d77b41200
trap_fatal() at trap_fatal+0x290/frame 0xffffff8d77b41260
trap_pfault() at trap_pfault+0x211/frame 0xffffff8d77b412f0
trap() at trap+0x344/frame 0xffffff8d77b414f0
calltrap() at calltrap+0x8/frame 0xffffff8d77b414f0
--- trap 0xc, rip = 0xffffffff80d17f66, rsp = 0xffffff8d77b415b0, rbp = 
0xffffff8d77b415f0 ---
bcopy() at bcopy+0x16/frame 0xffffff8d77b415f0
kthread_add() at kthread_add+0xe4/frame 0xffffff8d77b41710
kproc_kthread_add() at kproc_kthread_add+0xe1/frame 0xffffff8d77b418c0
spa_sync() at spa_sync+0x8d1/frame 0xffffff8d77b41990
txg_sync_thread() at txg_sync_thread+0x139/frame 0xffffff8d77b41aa0
fork_exit() at fork_exit+0x11f/frame 0xffffff8d77b41af0
fork_trampoline() at fork_trampoline+0xe/frame 0xffffff8d77b41af0
--- trap 0, rip = 0, rsp = 0xffffff8d77b41bb0, rbp = 0 ---
Uptime: 21h5m46s

more info at:
	ftp://ftp.cs.huji.ac.il/users/danny/freebsd/core.txt/1

thanks,
	danny