netbsd-9/amd64 i915drmkms panic

["John D. Baker" <jdbaker%consolidated.net@localhost>]

I've just had a panic on this machine which uses the intel G41 chip set
and graphics adapter.  The machine was mostly idle with three SSH sessions
to other hosts.  Two doing pkg_rolling-replace and the other building
-current/amd64.  Running X11 with "intel" driver, fvwm, urxvt, and xlock
(via xautolock).

Reading symbols from /net/yggdrasil/r0/build/netbsd-9/obj/amd64/sys/arch/amd64/compile/SPIKE/netbsd.gdb...
(gdb) target kvm netbsd.1.core
0xffffffff802229ea in cpu_reboot (howto=howto@entry=260, 
    bootstr=bootstr@entry=0x0)
    at /x/netbsd-9/src/sys/arch/amd64/amd64/machdep.c:728
728			dumpsys();
(gdb) bt
#0  0xffffffff802229ea in cpu_reboot (howto=howto@entry=260, 
    bootstr=bootstr@entry=0x0)
    at /x/netbsd-9/src/sys/arch/amd64/amd64/machdep.c:728
#1  0xffffffff805eb786 in vpanic (fmt=fmt@entry=0xffffffff80898b18 "trap", 
    ap=ap@entry=0xffff9480af0cdad8) at /x/netbsd-9/src/sys/kern/subr_prf.c:336
#2  0xffffffff805eb837 in panic (fmt=fmt@entry=0xffffffff80898b18 "trap")
    at /x/netbsd-9/src/sys/kern/subr_prf.c:255
#3  0xffffffff80224a2d in trap (frame=0xffff9480af0cdc20)
    at /x/netbsd-9/src/sys/arch/amd64/amd64/trap.c:334
#4  0xffffffff8021d4ab in alltraps ()
#5  0xffffffff806cb288 in i915_error_object_create (
    dev_priv=dev_priv@entry=0xffff94801079e000, src=<optimized out>, 
    vm=<optimized out>)
    at /x/netbsd-9/src/sys/external/bsd/drm2/dist/drm/i915/i915_gpu_error.c:671
#6  0xffffffff806cd724 in i915_gem_record_rings (error=0xfffff2d4a379d808, 
    dev=0xfffff2d688ec2008)
    at /x/netbsd-9/src/sys/external/bsd/drm2/dist/drm/i915/i915_gpu_error.c:1055
#7  i915_capture_error_state (dev=0xfffff2d688ec2008, wedged=<optimized out>, 
    error_msg=0xffff9480af0cdeb8 "Ring hung")
    at /x/netbsd-9/src/sys/external/bsd/drm2/dist/drm/i915/i915_gpu_error.c:1354
#8  0xffffffff806d9b06 in i915_handle_error (dev=0xfffff2d688ec2008, 
    wedged=<optimized out>, fmt=<optimized out>)
    at /x/netbsd-9/src/sys/external/bsd/drm2/dist/drm/i915/i915_irq.c:2656
#9  0xffffffff80463a19 in linux_workqueue_thread (cookie=0xfffff2d569cf17b0)
    at /x/netbsd-9/src/sys/external/bsd/common/linux/linux_work.c:402
#10 0xffffffff80209747 in lwp_trampoline ()
#11 0x0000000000000000 in ?? ()

-- 
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