panic at halt

Hi All

This panic after "halt -p" command at SMP system Intel SIA2.
Sources cvsuped at 2 May.

panic: blockable sleep lock (sleep mutex) acpica subsystem lock _at_
/usr/src/sys/dev/acpica/Osd/OsdSynch.c:380
at line 655 in file /usr/src/sys/kern/subr_witness.c
cpuid = 0;
boot() called on cpu#0
Uptime: 3h14m8s

kgdb) bt full
#0  doadump () at /usr/src/sys/kern/kern_shutdown.c:236
No locals.
#1  0xc06415d3 in boot (howto=256) at
/usr/src/sys/kern/kern_shutdown.c:370
No locals.
#2  0xc06419da in __panic () at /usr/src/sys/kern/kern_shutdown.c:548
        td = (struct thread *) 0xc46049a0
        bootopt = 256
        newpanic = 0
        ap = 0xd9128b54 "\235]\210юq\202╗ю5\201╗ю|\001"
        buf = "blockable sleep lock (sleep mutex) acpica subsystem lock
_at_ /usr/src/sys/dev/acpica/Osd/OsdSynch.c:380", '\0' <repeats 154 times>
#3  0xc066c45e in witness_checkorder (lock=0xc1980740, flags=9,
file=0xc0a88135 "/usr/src/sys/dev/acpica/Osd/OsdSynch.c",
    line=380) at /usr/src/sys/kern/subr_witness.c:654
        lock_list = (struct lock_list_entry **) 0xc46049a0
        lle = (struct lock_list_entry *) 0xc0663e0d
        lock1 = (struct lock_instance *) 0xd9128c48
        lock2 = (struct lock_instance *) 0x0
        class = (struct lock_class *) 0xc08c7e7c
        w = (struct witness *) 0xc0937a90
        w1 = (struct witness *) 0x1
        td = (struct thread *) 0xc46049a0
        i = -1
        j = 10
#4  0xc063740d in _mtx_lock_flags (m=0xc46049a0, opts=0, file=---Can't
read userspace from dump, or kernel process---
) at /usr/src/sys/kern/kern_mutex.c:250
No locals.
#5  0xc0a7fe5d in AcpiOsAcquireLock (Handle=0x0, Flags=0) at
/usr/src/sys/dev/acpica/Osd/OsdSynch.c:380
No locals.
#6  0xc0a584a3 in AcpiEvWalkGpeList (GpeWalkCallback=0xc0a61920
<AcpiHwClearGpeBlock>)
    at /usr/src/sys/contrib/dev/acpica/evgpeblk.c:204
        GpeBlock = (ACPI_GPE_BLOCK_INFO *) 0xc46049a0
        GpeXruptInfo = (ACPI_GPE_XRUPT_INFO *) 0xc1980740
        Status = 9
#7  0xc0a61b71 in AcpiHwClearAcpiStatus (Flags=0) at
/usr/src/sys/contrib/dev/acpica/hwregs.c:185
        Status = 0
#8  0xc0a627de in AcpiEnterSleepState (SleepState=5 '\005') at
/usr/src/sys/contrib/dev/acpica/hwsleep.c:361
        PM1AControl = 3229575852
        PM1BControl = 0
        SleepTypeRegInfo = (ACPI_BIT_REGISTER_INFO *) 0x0
        SleepEnableRegInfo = (ACPI_BIT_REGISTER_INFO *) 0x0
        InValue = 3641871428
        Retry = 0
        Status = 0
#9  0xc0a7204d in acpi_shutdown_poweroff (arg=0x0) at
/usr/src/sys/dev/acpica/acpi.c:1201
        status = 0
#10 0xc0668f87 in smp_rendezvous_action () at
/usr/src/sys/kern/subr_smp.c:340
No locals.
#11 0xc066908b in smp_rendezvous (setup_func=0, action_func=0,
teardown_func=0, arg=0x0)
---Type <return> to continue, or q <return> to quit---
    at /usr/src/sys/kern/subr_smp.c:382
No locals.
#12 0xc0a72016 in acpi_shutdown_final (arg=0xc43c1380, howto=16392) at
/usr/src/sys/dev/acpica/acpi.c:1178
        status = 0
#13 0xc0641676 in boot (howto=16392) at
/usr/src/sys/kern/kern_shutdown.c:373
        _ep = (struct eventhandler_entry *) 0x0
        _el = (struct eventhandler_list *) 0x0
#14 0xc0640d26 in reboot (td=0x0, uap=0x0) at
/usr/src/sys/kern/kern_shutdown.c:174


-- 
Alex Lyashkov <shadow_at_psoft.net>
PSoft