panic: pmap_insert_pt_page: pindex already inserted (r245473)

I've just gotten this panic on a -CURRENT (r245473):


freebsd10-zfs dumped core - see /var/crash/vmcore.0

Tue Jan 15 20:32:15 CST 2013

FreeBSD freebsd10-zfs 10.0-CURRENT FreeBSD 10.0-CURRENT #2 r245473: Tue Jan 15 19:45:27 CST 2013     root_at_freebsd10-zfs:/usr/obj/usr/src/sys/BORG-DTRACE  amd64

panic: pmap_insert_pt_page: pindex already inserted

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Unread portion of the kernel message buffer:
panic: pmap_insert_pt_page: pindex already inserted
cpuid = 1
KDB: enter: panic

Reading symbols from /boot/kernel/zfs.ko...Reading symbols from /boot/kernel/zfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/zfs.ko
Reading symbols from /boot/kernel/acl_nfs4.ko...Reading symbols from /boot/kernel/acl_nfs4.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/acl_nfs4.ko
Reading symbols from /boot/kernel/opensolaris.ko...Reading symbols from /boot/kernel/opensolaris.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/opensolaris.ko
Reading symbols from /boot/modules/vboxguest.ko...done.
Loaded symbols for /boot/modules/vboxguest.ko
#0  doadump (textdump=934624608) at pcpu.h:229
229	pcpu.h: No such file or directory.
 	in pcpu.h
(kgdb) #0  doadump (textdump=934624608) at pcpu.h:229
#1  0xffffffff8030a722 in db_fncall (dummy1=<value optimized out>,
     dummy2=<value optimized out>, dummy3=<value optimized out>,
     dummy4=<value optimized out>) at /usr/src/sys/ddb/db_command.c:578
#2  0xffffffff8030a3fa in db_command (last_cmdp=<value optimized out>,
     cmd_table=<value optimized out>, dopager=1)
     at /usr/src/sys/ddb/db_command.c:449
#3  0xffffffff8030a1b2 in db_command_loop ()
     at /usr/src/sys/ddb/db_command.c:502
#4  0xffffffff8030cb00 in db_trap (type=<value optimized out>, code=0)
     at /usr/src/sys/ddb/db_main.c:231
#5  0xffffffff805691c3 in kdb_trap (type=10, code=0, tf=<value optimized out>)
     at /usr/src/sys/kern/subr_kdb.c:654
#6  0xffffffff80740993 in trap (frame=0xffffff8437b540d0)
     at /usr/src/sys/amd64/amd64/trap.c:579


I have the core.txt.0 at:
http://www.lerctr.org/~ler/core.txt.0

This is in a VirtualBox VM running on a -CURRENT host.

What else do you need?

I do have the core.....


-- 
Larry Rosenman                     http://www.lerctr.org/~ler
Phone: +1 512-248-2683                 E-Mail: ler_at_lerctr.org
US Mail: 430 Valona Loop, Round Rock, TX 78681-3893