[Xen-bugs] [Bug 1736] New: [vt-d]fail to detach NIC from guest

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1736

           Summary: [vt-d]fail to detach NIC from guest
           Product: Xen
           Version: unstable
          Platform: x86-64
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P1
         Component: Hypervisor
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: yang.z.zhang@xxxxxxxxx


Environment:
------------
Service Arch (ia32/ia32e/IA64): 32e
Guest Arch (ia32/ia32e/IA64): 32e
Guest OS Type (Linux/Windows):Linux
Change Set: 22904
Hardware: All
Other:
xen changeset:   22904:c64dcc4d2eca
tag:         tip
user:        Keir Fraser <keir@xxxxxxx>
date:        Thu Feb 10 17:24:41 2011 +0000
files:       xen/Makefile
description:
Update Xen evrsion to 4.1.0-rc5-pre

pvops dom0:
commit 75cc13f5aa29b4f3227d269ca165dfa8937c94fe
Merge: 2607c07 a386bf7
Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
Date:   Thu Dec 9 17:16:16 2010 -0800

qemu-xen:
commit 833e7e9a4c95739429dc0c803bbbf2346f9897fd
Author: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Date:   Thu Jul 8 17:33:29 2010 +0100


Bug detailed description:
--------------------------
we boot guest with vnif. After it bootup, we attach a NIC to guest and detach
it. Then we see guest console was broken. For different guests, it has
different phenomenon. For rhel5 guest, it will print some useless infomation.
For rhel6 guest and fedora guest, guest console cannot get any input again.
Windows guest doesn't have this issue.


Reproduce steps:
----------------
1.install latest xen(22904)
2.give a vnif in guest config
3.create guest
4.after guest bootup, dynamic attach a NIC to guest
5.then detach the NIC

Current result:
----------------
guest console broken

Expected result:
----------------
detach NIC sucessfully

Basic root-causing log:
----------------------


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