amd64-7.0_STABLE trap panic

["John D. Baker" <jdbaker%mylinuxisp.com@localhost>]

Shortly after updating my file server to the latest 7.0_STABLE:

NetBSD yggdrasil.technoskunk.fur 7.0_STABLE NetBSD 7.0_STABLE (YGGDRASIL) #120: Fri Nov  6 08:52:21 CST 2015  sysop%yggdrasil.technoskunk.fur@localhost:/r0/build/netbsd-7/obj/amd64/sys/arch/amd64/compile/YGGDRASIL amd64

the machine panicked.  Upon reboot, the saved crash dump showed:

$ crash -M netbsd.2.core -N netbsd.2
Crash version 7.0_STABLE, image version 7.0_STABLE.
System panicked: trap
Backtrace from time of crash is available.
crash> bt
_KERNEL_OPT_NAGR() at 0
_KERNEL_OPT_NAGR() at 0
vpanic() at vpanic+0x145
snprintf() at snprintf
startlwp() at startlwp
calltrap() at calltrap+0x11
VOP_PUTPAGES() at VOP_PUTPAGES+0x3a
uvm_pageout() at uvm_pageout+0x2f1
crash>

The machine was building a -current release at the time as well as
serving the various src/xsrc/pkgsrc trees to two NFS clients building
-current for other architectures.  Also serving my home directory to
a third client.

The "_KERNEL_OPT_NAGR()" statements are puzzling.  They would appear to
refer to the "agr" link-aggregation pseudo-device, but the running kernel
omits that device, including GENERIC, then using "no pseudo-device agr".

I don't know if I can repeat it, but if it happens again, I'll make note
of it.  Anything else to look at in the crashdump?

-- 
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