port-xen/46742: kernel panic on NetBSD/amd64 XEN3_DOMU on Citrix XenServer

[ryoon%NetBSD.org@localhost]

>Number:         46742
>Category:       port-xen
>Synopsis:       kernel panic on NetBSD/amd64 XEN3_DOMU on Citrix XenServer
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-xen-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jul 24 20:15:00 +0000 2012
>Originator:     Ryo ONODERA
>Release:        NetBSD 6.0_BETA2
>Organization:
        
>Environment:
        
        
NetBSD/amd64 XEN3_DOMU from 
ftp://ftp.netbsd.org/pub/NetBSD/misc/XenServer/NetBSD_amd64-6.0_BETA2.xva.bz2
>Description:
When changing Network type to "VM" from "Network0" or vice versa
on Citrix XenServer, kernel panic with the following messages
(manually copied).
I am using NetBSD/amd64 6.0_BETA2 (XEN3_DOMU kernel) xva image from
ftp://ftp.netbsd.org/pub/NetBSD/misc/XenServer/NetBSD_amd64-6.0_BETA2.xva.bz2
on Citrix XenServer 6.0.201.

panic: kernel diagnostic assertion "(entry->flags & UVM_MAP_STATIC) == 0" 
failed : file "/usr/src/sys/uvm/uvm_map.c", line 2218
cpu0: Begin traceback...
kern_assert() at netbsd:kern_assert+0xae
uvm_unmap_remove() at netbsd:uvm_unmap_remove+0x3a5
uvm_unmap1() at netbsd:uvm_unmap1+0x35
xennet_xenbus_detach() at netbsd:xennet_zenbus_detach+0x262
config_detach() at netbsd:config_detach"0xda
otherend_charged() at netbsd:otherend_charged+0x74
xenwatch_thread() at netbsd:xenwatch_thread+0xa2
cpu0: End traceback...

dump to dev 142,1 not possible
rebooting...
        
>How-To-Repeat:
Install Citrix XenServer 6.0.201 to server machine and install its XenCenter to
Microsoft Windows client machine.
And connect to XenServer from XenCenter.
Import NetBSD_amd64-6.0_BETA2.xva from
ftp://ftp.netbsd.org/pub/NetBSD/misc/XenServer/NetBSD_amd64-6.0_BETA2.xva.bz2 .

Run the VM, and on "Networking" tab, change network type.
        
>Fix:
        
I have no idea.


>Unformatted: