page fault at shutdown

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

Hello
I noticed that some domUs panic at shutdown time:
syncing disks... done
xenbus: can't get state for device/suspend/event-channel (2)
xenbus: can't get state for device/suspend/event-channel (2)
xbd1: detached
fatal page fault in supervisor mode
trap type 6 code 0 rip 0xffffffff8022f2a8 cs 0xe030 rflags 0x10246 cr2 0xffffa0002c11a008 ilevel 0x6 rsp 0xffffa0002bd18ca8
curlwp 0xffffa000009181a0 pid 0.43 lowest kstack 0xffffa0002bd152c0
Skipping crash dump on recursive panic
panic: trap
cpu0: Begin traceback...
vpanic() at netbsd:vpanic+0x140
snprintf() at netbsd:snprintf
startlwp() at netbsd:startlwp
alltraps() at netbsd:alltraps+0xac
xen_intr_biglock_wrapper() at netbsd:xen_intr_biglock_wrapper+0x1d
Xresume_xenev6() at netbsd:Xresume_xenev6+0x49
--- interrupt ---
Xspllower() at netbsd:Xspllower+0xe
xenbus_thread() at netbsd:xenbus_thread+0x34
cpu0: End traceback...

Looks like the interrupt handler is not properly detached when a device is
removed ...

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--