>Number:         32771
>Category:       port-xen
>Synopsis:       xen network status change
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-xen-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Feb 08 07:45:00 +0000 2006
>Originator:     Love
>Release:        NetBSD 3.99.15
>Organization:
	
>Environment:
System: NetBSD xen2-netbsd4-arla.lab.it.su.se 3.99.15 NetBSD 3.99.15 (XENU) #0: Thu Feb 2 13:53:02 CET 2006 root@xen2-netbsd-netbsd.it.su.se:/usr/src/sys/arch/i386/compile/XENU i386
Architecture: i386
Machine: i386
>Description:

	the linux dom0 xenhost that my arla lab machine
	seems to have something weired going on in the network
	land, iether in the physical end, or in the xen/dom0 end.

	anyway, when running my nightly tests for arla my netbsd domU
	fell over with this backtrace

db> tr
xen_network_handler(c0855000,c9b77e14,c07c3480,c9b77dbc,1) at netbsd:xen_network_handler+0x18c
evtchn_do_event(4,c9b77e14,0,4c,2) at netbsd:evtchn_do_event+0xee
do_hypervisor_callback(c9b77e14,0,11,c0470031,c07c0011) at netbsd:do_hypervisor_callback+0x13f
hypervisor_callback(4,c0395520,c0855000,5,c085501c) at netbsd:hypervisor_callback+0x64
xennet_interface_status_change(c045d3c4,0,c9b82b60,0,10) at netbsd:xennet_interface_status_change+0x1db
xennet_ctrlif_rx(c045d3c0,0,c03ff5d6,0,0) at netbsd:xennet_ctrlif_rx+0x58
__ctrl_if_rxmsg_deferred(c9b8be70,500000,c050a000,0,c010017c) at netbsd:__ctrl_if_rxmsg_deferred+0xc3
db> c
uvm_fault(0xc0453840, 0xc0886000, 0, 1) -> 0xe
kernel: supervisor trap page fault, code=0
Stopped in pid 2.1 (ctrlif) at  netbsd:xen_network_handler+0x18c:       movl    0 xe74(%ecx,%eax,4),%eax
db> tr
xen_network_handler(c0855000,c9b77e14,c07c3480,c9b77dbc,1) at netbsd:xen_network_handler+0x18c
evtchn_do_event(4,c9b77e14,0,4c,2) at netbsd:evtchn_do_event+0xee
do_hypervisor_callback(c9b77e14,0,11,c0470031,c07c0011) at netbsd:do_hypervisor_callback+0x13f
hypervisor_callback(4,c0395520,c0855000,5,c085501c) at netbsd:hypervisor_callback+0x64
xennet_interface_status_change(c045d3c4,0,c9b82b60,0,10) at netbsd:xennet_interface_status_change+0x1db
xennet_ctrlif_rx(c045d3c0,0,c03ff5d6,0,0) at netbsd:xennet_ctrlif_rx+0x58
__ctrl_if_rxmsg_deferred(c9b8be70,500000,c050a000,0,c010017c) at netbsd:__ctrl_if_rxmsg_deferred+0xc3
db>

>How-To-Repeat:
	
>Fix: