Re: PQ_LAUNDRY: unexpected behaviour

On 6 Jan 2017, at 14:06, Matthew Macy wrote:

> kernel cores tend to be large (all of wired memory after all) and 
> unless I have exactly the same kernel as you with the same sources at 
> the same changeset, not useful. A backtrace is a good place to start.
>> kgdb /boot/kernel/kernel /var/crash/vmcore.last
> % bt
>
> -M

Ok, here we are:

#0  doadump (textdump=0) at pcpu.h:222
#1  0xffffffff82a445e7 in vt_kms_postswitch (arg=<value optimized out>)
     at 
/usr/home/jon/freebsd/graphics/sys/modules/drm/drm/../../../dev/drm/linux_fb.c:82
#2  0xffffffff808de76b in vt_window_switch (vw=0xffffffff81760ea8)
     at /usr/home/jon/freebsd/graphics/sys/dev/vt/vt_core.c:540
#3  0xffffffff808dc280 in vtterm_cngrab (tm=<value optimized out>)
     at /usr/home/jon/freebsd/graphics/sys/dev/vt/vt_core.c:1465
#4  0xffffffff809f3e02 in cngrab () at 
/usr/home/jon/freebsd/graphics/sys/kern/kern_cons.c:368
#5  0xffffffff80a4d27a in vpanic (fmt=0xffffffff80ff218f "Assertion %s 
failed at %s:%d",
     ap=0xfffffe0233e6f5f0) at 
/usr/home/jon/freebsd/graphics/sys/kern/kern_shutdown.c:765
#6  0xffffffff80a4d166 in kassert_panic (fmt=<value optimized out>)
     at /usr/home/jon/freebsd/graphics/sys/kern/kern_shutdown.c:669
#7  0xffffffff80d2b93c in vm_fault_hold (map=0xfffff8010c9aa000, 
vaddr=34369822720,
     fault_type=<value optimized out>, fault_flags=0, m_hold=0x0)
     at /usr/home/jon/freebsd/graphics/sys/vm/vm_fault.c:389
#8  0xffffffff80d2a1b8 in vm_fault (map=0xfffff8010c9aa000, vaddr=<value 
optimized out>,
     fault_type=2 '\002', fault_flags=<value optimized out>)
     at /usr/home/jon/freebsd/graphics/sys/vm/vm_fault.c:474
#9  0xffffffff80ebb412 in trap_pfault (frame=0xfffffe0233e6f9c0, 
usermode=1)
     at /usr/home/jon/freebsd/graphics/sys/amd64/amd64/trap.c:708
#10 0xffffffff80ebaba2 in trap (frame=0xfffffe0233e6f9c0)
     at /usr/home/jon/freebsd/graphics/sys/amd64/amd64/trap.c:326
#11 0xffffffff80e9b181 in calltrap ()
     at /usr/home/jon/freebsd/graphics/sys/amd64/amd64/exception.S:236
#12 0x00000008022a3876 in ?? ()

It looks like the other core files have the same backtrace. Please let 
me know if any other details would help...


Jon
--
jonathan.anderson_at_ieee.org