[OpenIndiana-discuss] "bad mutex" crash?

[Dan Swartzendruber]

I've got a virtualized OI151a7 running under ESXi 5.1.  A small root pool VM
disk, and two SATA disks passed as RDMs.  I wanted to back it up to amazon
glacier, so I removed the two RDMs before doing the backup.  The problem
happened when I was shutting down the OI VM to be able to edit the config
for it.  I clicked on the shutdown VM option in the vsphere menu for the VM
and almost instantly saw the panic.  I believe ESXi does this kind of stuff
under the sheets using the vmware tools to simulate an ACPI shutdown.  I do
have a crash dump if anyone wants to look at it.  The fmdump info:

root at nas2:~# fmdump -Vp -u e78c0b4e-63ee-ef79-b964-974ca7eca6a0
TIME                           UUID
SUNW-MSG-ID
Oct 28 2012 14:34:13.786100000 e78c0b4e-63ee-ef79-b964-974ca7eca6a0
SUNOS-8000-KL

  TIME                 CLASS                                 ENA
  Oct 28 14:34:03.7006 ireport.os.sunos.panic.dump_pending_on_device
0x0000000000000000

nvlist version: 0
        version = 0x0
        class = list.suspect
        uuid = e78c0b4e-63ee-ef79-b964-974ca7eca6a0
        code = SUNOS-8000-KL
        diag-time = 1351449253 766125
        de = fmd:///module/software-diagnosis
        fault-list-sz = 0x1
        fault-list = (array of embedded nvlists)
        (start fault-list[0])
        nvlist version: 0
                version = 0x0
                class = defect.sunos.kernel.panic
                certainty = 0x64
                asru =
sw:///:path=/var/crash/openindiana2/.e78c0b4e-63ee-ef79-b964-974ca7eca6a0
                resource =
sw:///:path=/var/crash/openindiana2/.e78c0b4e-63ee-ef79-b964-974ca7eca6a0
                savecore-succcess = 0
                os-instance-uuid = e78c0b4e-63ee-ef79-b964-974ca7eca6a0
                panicstr = mutex_enter: bad mutex, lp=ffffffffc0391e78
owner=ffffff019cb008a0 thread=ffffff00072cac40
                panicstack = unix:mutex_panic+73 () |
unix:mutex_vector_enter+446 () | genunix:cv_timedwait_hires+fd () |
genunix:cv_timedwait_sig_hires+336 () | genunix:cv_timedwait_sig+4c () |
fffffffff7f9a9c5 () | unix:thread_start+8 () |
                crashtime = 1351448035
                panic-time = October 28, 2012 02:13:55 PM EDT EDT
        (end fault-list[0])

        fault-status = 0x1
        severity = Major
        __ttl = 0x1
        __tod = 0x508d7aa5 0x2edaef20