Created attachment 173742 [details]
head -1219 /var/crash/vmcore.1
page fault on 11.0-RC1.
% cat /var/crash/info.1
Dump header from device: /dev/gpt/fbswap
Architecture Version: 2
Dump Length: 586940416
Dumptime: Tue Aug 16 23:48:25 2016
Magic: FreeBSD Kernel Dump
Version String: FreeBSD 11.0-RC1 #0 r303979: Fri Aug 12 02:28:24 UTC 2016
Panic String: page fault
Dump Parity: 2842384414
Dump Status: good
% ls -lh /var/crash/vmcore.1
-rw-r----- 1 root wheel 560M Aug 16 23:49 /var/crash/vmcore.1
As I can see from the log file, the crash was caused by iwm(4); can you reproduce the issue after base r330211 (11-STABLE) / base r318223 (CURRENT) ?