[Xen-bugs] [Bug 1693] New: [VT-d] xen panic sometimes when run guest with NIC assigned

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1693

           Summary: [VT-d] xen panic sometimes when run guest with NIC
                    assigned
           Product: Xen
           Version: unstable
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: blocker
          Priority: P1
         Component: HVM
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: yang.z.zhang@xxxxxxxxx


Environment:
------------
Service Arch (ia32/ia32e/IA64): ia32e
Guest Arch (ia32/ia32e/IA64): 
Guest OS Type (Linux/Windows):Linux
Change Set: 22415
Hardware: Westmere-ep Other:
xen-changeset:   22415:899131a8f9d2
xen-date:        Mon Nov 22 08:29:03 2010 +0000

pvops git:
commit 481bd8e6b8dafed2ea445e8cde2abbbb95b49ec1
Merge: 80f7e08... e1effdd...
Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
Date:   Tue Nov 16 15:08:00 2010 -0800

ioemu git:
commit 60766b459c41e429a4b2405124b42512ea362984
Author: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Date:   Fri Nov 19 18:50:43 2010 +0000

tboot changeset:
changeset:   244:2532ddd46f57
tag:         tip
user:        Joseph Cihula <joseph.cihula@xxxxxxxxx>
date:        Tue Nov 02 12:32:20 2010 -0700
summary:     Fixed bug with PCONF elements not displaying correctly




Bug detailed description:
--------------------------
For Westmere-ep and Sandybridge ia32e platform,running a guest with NIC
assigned will cause kernel panic sometimes.This issue has not been seen under
Westmere-ep PAE platform.There are xen call trace on
Westmere-ep ia32e platform as following:

XEN) Xen call trace:
(XEN)    [<ffff82c48011544a>] free_xenheap_pages+0x114/0x128
(XEN)    [<ffff82c4801284c8>] xfree+0x9d/0xad
(XEN)    [<ffff82c480154d8d>] arch_domain_destroy+0x2de/0x2e3
(XEN)    [<ffff82c480105037>] complete_domain_destroy+0x7a/0x140
(XEN)    [<ffff82c480128f23>] rcu_process_callbacks+0x173/0x1dc
(XEN)    [<ffff82c4801213ba>] __do_softirq+0x87/0x98
(XEN)    [<ffff82c48012152e>] do_softirq+0x75/0x77


There are detailed log in the attachment,pls check it.


Reproduce steps:
----------------
1.Install the latest xen-unstable (c/s 22415).
2.Assign a NIC to guest.
3.Using xm create config to start guest.
4.Sometimes,we see kernel panic


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