From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 63131] New: guest hang when reboot .
Date: Wed, 16 Oct 2013 01:57:19 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=63131

            Bug ID: 63131
           Summary: guest hang when reboot .
           Product: Virtualization
           Version: unspecified
    Kernel Version: 3.12.0-rc2
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: kvm
          Assignee: virtualization_kvm@kernel-bugs.osdl.org
          Reporter: chao.zhou@intel.com
        Regression: No

Environment:
------------
Host OS (ia32/ia32e/IA64):ia32e
Guest OS (ia32/ia32e/IA64):ia32e
Guest OS Type (Linux/Windows):Windows
kvm.git Commit:7854cbca815562a49d50bbc6f31599312853d1f4
qemu.git Commit:1cdae4573d7613149348d834c605bfbe3c7d405b
Host Kernel Version:3.12.0-rc2
Hardware: Romley_EP


Bug detailed description:
--------------------------
create guest then reboot ,the guest will hang

note 
1.try win7, win8, win2012,win2k8 and rhel6u4 guest, while reboot,guest will
hang
2.when create guest with "-cpu host" the guest reboot pass
3.This should be a kernel bug
kvm      + qemu     =  result
7854cbca + 1cdae457 =  bad
2f303b74 + 1cdae457 =  good

Reproduce steps:
----------------
1.create guest
qemu-system-x86_64 -enable-kvm -m 2048 -smp 2 -net none win7.qcow

2.reboot the guest

Current result:
----------------
guest hang

Expected result:
----------------
guest can work well while reboot

Basic root-causing log:

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