[Qemu-devel] [Bug 953754] Re: one of the two assigned NICs doesn’t work in SMP guest.

2012-05-15 Thread Yongjie Ren
It was fixed in latest qemu-kvm tree.
verified it against  kvm + qemu-kvm: 331b646d..+ e54f008e..

** Changed in: qemu
   Status: New = Fix Released

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https://bugs.launchpad.net/bugs/953754

Title:
  one of the two assigned NICs doesn’t work in SMP guest.

Status in QEMU:
  Fix Released

Bug description:
  Environment:
  
  Host OS (ia32/ia32e/IA64):ia32e
  Guest OS (ia32/ia32e/IA64):ia32e
  Guest OS Type (Linux/Windows): Linux(RHEL6u1)
  kvm.git Commit:186195928e8149b27cdd603a660dace454969f2b
  qemu-kvm Commit: 81bdec908fb2be0ccaff1d4ee67956c509e440ad
  Host Kernel Version:3.3.0-rc5
  Hardware: Romley-EP, WSM-EP

  Bug detailed description:
  --
  SMP guest cannot get two IP addresses when assign two NICs with igb driver.
  I tried with Intel I350 and 82576 Ethernet Adapter.

  Note:
   1. when assign two NICs, both of the drivers are igb, but the guest can 
only get one IP.
   2. When assign two NICs, one driver is igb, another is ixgbe, the guest 
can get two IP address.
   3. UP guest can get two IP.
   4. smp guest, and assign two VFs with igbvf driver, the guest can get 
two IP addresses.

  This should be a qemu-kvm bug.
  kvm  + qemu-kvm   =  result
  18619592 + 81bdec90   =  bad
  18619592 + b5ed4b6f   =  good

  Reproduce steps:
  
  1. start up a host with kvm kernel
  2. /root/pcistub.sh –h 08:00.0
  3. /root/pcistub.sh –h 0d:00.1
  4. qemu-system-x86_64 –m 512 –smp 2 –device pci-assign,host=0d:00.1
  –net none –device pci-assign,host=08:00.0 –net none –hda
  /root/rhel6u1.img
  5. ifconfig

  Current result:
  
  Only one can work

  Expected result:
  
  Both NICs can work

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/953754/+subscriptions



[Qemu-devel] [Bug 953754] Re: one of the two assigned NICs doesn’t work in SMP guest.

2012-03-13 Thread Yongjie Ren
** Attachment added: guest dmesg log
   
https://bugs.launchpad.net/qemu/+bug/953754/+attachment/2861052/+files/dmesg-guest.log

-- 
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/953754

Title:
  one of the two assigned NICs doesn’t work in SMP guest.

Status in QEMU:
  New

Bug description:
  Environment:
  
  Host OS (ia32/ia32e/IA64):ia32e
  Guest OS (ia32/ia32e/IA64):ia32e
  Guest OS Type (Linux/Windows): Linux(RHEL6u1)
  kvm.git Commit:186195928e8149b27cdd603a660dace454969f2b
  qemu-kvm Commit: 81bdec908fb2be0ccaff1d4ee67956c509e440ad
  Host Kernel Version:3.3.0-rc5
  Hardware: Romley-EP, WSM-EP

  
  Bug detailed description:
  --
  SMP guest cannot get two IP addresses when assign two NICs with igb driver.
  I tried with Intel I350 and 82576 Ethernet Adapter.

  Note:
   1. when assign two NICs, both of the drivers are igb, the guest get only 
get one  IP.
   2. When assign two NICs, one driver is igb, another is ixgbe, the guest 
can get two IP address.
   3. UP guest can get two IP.
   4. smp guest, and assign two VFs with igb driver, the guest can get two 
IP
  addresses.

  This should be a qemu-kvm bug.
  kvm  + qemu-kvm   =  result
  18619592 + 81bdec90   =  bad 
  18619592 + b5ed4b6f   =  good

  Reproduce steps:
  
  1. start up a host with kvm kernel
  2. /root/pcistub.sh –h 08:00.0
  3. /root/pcistub.sh –h 0d:00.1
  4. qemu-system-x86_64 –m 512 –smp 2 –device pci-assign,host=0d:00.1
  –net none –device pci-assign,host=08:00.0 –net none –hda
  /root/rhel6u1.img
  5. ifconfig 

  
  Current result:
  
  Only one can work

  Expected result:
  
  Both NICs can work

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/953754/+subscriptions



[Qemu-devel] [Bug 953754] Re: one of the two assigned NICs doesn’t work in SMP guest.

2012-03-13 Thread Yongjie Ren
** Attachment added: lspci -vvv 82576 NIC in guest
   
https://bugs.launchpad.net/qemu/+bug/953754/+attachment/2861057/+files/lspci-guest-82576.log

-- 
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/953754

Title:
  one of the two assigned NICs doesn’t work in SMP guest.

Status in QEMU:
  New

Bug description:
  Environment:
  
  Host OS (ia32/ia32e/IA64):ia32e
  Guest OS (ia32/ia32e/IA64):ia32e
  Guest OS Type (Linux/Windows): Linux(RHEL6u1)
  kvm.git Commit:186195928e8149b27cdd603a660dace454969f2b
  qemu-kvm Commit: 81bdec908fb2be0ccaff1d4ee67956c509e440ad
  Host Kernel Version:3.3.0-rc5
  Hardware: Romley-EP, WSM-EP

  
  Bug detailed description:
  --
  SMP guest cannot get two IP addresses when assign two NICs with igb driver.
  I tried with Intel I350 and 82576 Ethernet Adapter.

  Note:
   1. when assign two NICs, both of the drivers are igb, the guest get only 
get one  IP.
   2. When assign two NICs, one driver is igb, another is ixgbe, the guest 
can get two IP address.
   3. UP guest can get two IP.
   4. smp guest, and assign two VFs with igb driver, the guest can get two 
IP
  addresses.

  This should be a qemu-kvm bug.
  kvm  + qemu-kvm   =  result
  18619592 + 81bdec90   =  bad 
  18619592 + b5ed4b6f   =  good

  Reproduce steps:
  
  1. start up a host with kvm kernel
  2. /root/pcistub.sh –h 08:00.0
  3. /root/pcistub.sh –h 0d:00.1
  4. qemu-system-x86_64 –m 512 –smp 2 –device pci-assign,host=0d:00.1
  –net none –device pci-assign,host=08:00.0 –net none –hda
  /root/rhel6u1.img
  5. ifconfig 

  
  Current result:
  
  Only one can work

  Expected result:
  
  Both NICs can work

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/953754/+subscriptions



[Qemu-devel] [Bug 953754] Re: one of the two assigned NICs doesn’t work in SMP guest.

2012-03-13 Thread Yongjie Ren
** Description changed:

  Environment:
  
  Host OS (ia32/ia32e/IA64):ia32e
  Guest OS (ia32/ia32e/IA64):ia32e
  Guest OS Type (Linux/Windows): Linux(RHEL6u1)
  kvm.git Commit:186195928e8149b27cdd603a660dace454969f2b
  qemu-kvm Commit: 81bdec908fb2be0ccaff1d4ee67956c509e440ad
  Host Kernel Version:3.3.0-rc5
  Hardware: Romley-EP, WSM-EP
  
- 
  Bug detailed description:
  --
  SMP guest cannot get two IP addresses when assign two NICs with igb driver.
  I tried with Intel I350 and 82576 Ethernet Adapter.
  
  Note:
-  1. when assign two NICs, both of the drivers are igb, the guest get only 
get one  IP.
-  2. When assign two NICs, one driver is igb, another is ixgbe, the guest 
can get two IP address.
-  3. UP guest can get two IP.
-  4. smp guest, and assign two VFs with igb driver, the guest can get two 
IP
+  1. when assign two NICs, both of the drivers are igb, but the guest can 
only get one IP.
+  2. When assign two NICs, one driver is igb, another is ixgbe, the guest 
can get two IP address.
+  3. UP guest can get two IP.
+  4. smp guest, and assign two VFs with igb driver, the guest can get two 
IP
  addresses.
  
  This should be a qemu-kvm bug.
  kvm  + qemu-kvm   =  result
- 18619592 + 81bdec90   =  bad 
+ 18619592 + 81bdec90   =  bad
  18619592 + b5ed4b6f   =  good
  
  Reproduce steps:
  
  1. start up a host with kvm kernel
  2. /root/pcistub.sh –h 08:00.0
  3. /root/pcistub.sh –h 0d:00.1
  4. qemu-system-x86_64 –m 512 –smp 2 –device pci-assign,host=0d:00.1
  –net none –device pci-assign,host=08:00.0 –net none –hda
  /root/rhel6u1.img
- 5. ifconfig 
- 
+ 5. ifconfig
  
  Current result:
  
  Only one can work
  
  Expected result:
  
  Both NICs can work

** Description changed:

  Environment:
  
  Host OS (ia32/ia32e/IA64):ia32e
  Guest OS (ia32/ia32e/IA64):ia32e
  Guest OS Type (Linux/Windows): Linux(RHEL6u1)
  kvm.git Commit:186195928e8149b27cdd603a660dace454969f2b
  qemu-kvm Commit: 81bdec908fb2be0ccaff1d4ee67956c509e440ad
  Host Kernel Version:3.3.0-rc5
  Hardware: Romley-EP, WSM-EP
  
  Bug detailed description:
  --
  SMP guest cannot get two IP addresses when assign two NICs with igb driver.
  I tried with Intel I350 and 82576 Ethernet Adapter.
  
  Note:
   1. when assign two NICs, both of the drivers are igb, but the guest can 
only get one IP.
   2. When assign two NICs, one driver is igb, another is ixgbe, the guest 
can get two IP address.
   3. UP guest can get two IP.
-  4. smp guest, and assign two VFs with igb driver, the guest can get two 
IP
- addresses.
+  4. smp guest, and assign two VFs with igbvf driver, the guest can get 
two IP addresses.
  
  This should be a qemu-kvm bug.
  kvm  + qemu-kvm   =  result
  18619592 + 81bdec90   =  bad
  18619592 + b5ed4b6f   =  good
  
  Reproduce steps:
  
  1. start up a host with kvm kernel
  2. /root/pcistub.sh –h 08:00.0
  3. /root/pcistub.sh –h 0d:00.1
  4. qemu-system-x86_64 –m 512 –smp 2 –device pci-assign,host=0d:00.1
  –net none –device pci-assign,host=08:00.0 –net none –hda
  /root/rhel6u1.img
  5. ifconfig
  
  Current result:
  
  Only one can work
  
  Expected result:
  
  Both NICs can work

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/953754

Title:
  one of the two assigned NICs doesn’t work in SMP guest.

Status in QEMU:
  New

Bug description:
  Environment:
  
  Host OS (ia32/ia32e/IA64):ia32e
  Guest OS (ia32/ia32e/IA64):ia32e
  Guest OS Type (Linux/Windows): Linux(RHEL6u1)
  kvm.git Commit:186195928e8149b27cdd603a660dace454969f2b
  qemu-kvm Commit: 81bdec908fb2be0ccaff1d4ee67956c509e440ad
  Host Kernel Version:3.3.0-rc5
  Hardware: Romley-EP, WSM-EP

  Bug detailed description:
  --
  SMP guest cannot get two IP addresses when assign two NICs with igb driver.
  I tried with Intel I350 and 82576 Ethernet Adapter.

  Note:
   1. when assign two NICs, both of the drivers are igb, but the guest can 
only get one IP.
   2. When assign two NICs, one driver is igb, another is ixgbe, the guest 
can get two IP address.
   3. UP guest can get two IP.
   4. smp guest, and assign two VFs with igbvf driver, the guest can get 
two IP addresses.

  This should be a qemu-kvm bug.
  kvm  + qemu-kvm   =  result
  18619592 + 81bdec90   =  bad
  18619592 + b5ed4b6f   =  good

  Reproduce steps:
  
  1. start up a host with kvm kernel
  2. /root/pcistub.sh –h 08:00.0
  3. /root/pcistub.sh –h 0d:00.1
  4. qemu-system-x86_64 –m 512 –smp 2 –device pci-assign,host=0d:00.1
  –net none –device pci-assign,host=08:00.0 –net none –hda
  /root/rhel6u1.img
  5. ifconfig

  Current result:
  
  Only one can work

  Expected result:
  

[Qemu-devel] [Bug 953754] Re: one of the two assigned NICs doesn’t work in SMP guest.

2012-03-13 Thread Yongjie Ren
** Attachment added: lspci -vvv  82576 NIC in host
   
https://bugs.launchpad.net/qemu/+bug/953754/+attachment/2861055/+files/lspci-host-82576.log

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/953754

Title:
  one of the two assigned NICs doesn’t work in SMP guest.

Status in QEMU:
  New

Bug description:
  Environment:
  
  Host OS (ia32/ia32e/IA64):ia32e
  Guest OS (ia32/ia32e/IA64):ia32e
  Guest OS Type (Linux/Windows): Linux(RHEL6u1)
  kvm.git Commit:186195928e8149b27cdd603a660dace454969f2b
  qemu-kvm Commit: 81bdec908fb2be0ccaff1d4ee67956c509e440ad
  Host Kernel Version:3.3.0-rc5
  Hardware: Romley-EP, WSM-EP

  
  Bug detailed description:
  --
  SMP guest cannot get two IP addresses when assign two NICs with igb driver.
  I tried with Intel I350 and 82576 Ethernet Adapter.

  Note:
   1. when assign two NICs, both of the drivers are igb, the guest get only 
get one  IP.
   2. When assign two NICs, one driver is igb, another is ixgbe, the guest 
can get two IP address.
   3. UP guest can get two IP.
   4. smp guest, and assign two VFs with igb driver, the guest can get two 
IP
  addresses.

  This should be a qemu-kvm bug.
  kvm  + qemu-kvm   =  result
  18619592 + 81bdec90   =  bad 
  18619592 + b5ed4b6f   =  good

  Reproduce steps:
  
  1. start up a host with kvm kernel
  2. /root/pcistub.sh –h 08:00.0
  3. /root/pcistub.sh –h 0d:00.1
  4. qemu-system-x86_64 –m 512 –smp 2 –device pci-assign,host=0d:00.1
  –net none –device pci-assign,host=08:00.0 –net none –hda
  /root/rhel6u1.img
  5. ifconfig 

  
  Current result:
  
  Only one can work

  Expected result:
  
  Both NICs can work

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/953754/+subscriptions



[Qemu-devel] [Bug 953754] Re: one of the two assigned NICs doesn’t work in SMP guest.

2012-03-13 Thread Yongjie Ren
** Attachment added: lspci -vvv  I350 NIC in host
   
https://bugs.launchpad.net/qemu/+bug/953754/+attachment/2861054/+files/lspci-host-I350.log

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/953754

Title:
  one of the two assigned NICs doesn’t work in SMP guest.

Status in QEMU:
  New

Bug description:
  Environment:
  
  Host OS (ia32/ia32e/IA64):ia32e
  Guest OS (ia32/ia32e/IA64):ia32e
  Guest OS Type (Linux/Windows): Linux(RHEL6u1)
  kvm.git Commit:186195928e8149b27cdd603a660dace454969f2b
  qemu-kvm Commit: 81bdec908fb2be0ccaff1d4ee67956c509e440ad
  Host Kernel Version:3.3.0-rc5
  Hardware: Romley-EP, WSM-EP

  
  Bug detailed description:
  --
  SMP guest cannot get two IP addresses when assign two NICs with igb driver.
  I tried with Intel I350 and 82576 Ethernet Adapter.

  Note:
   1. when assign two NICs, both of the drivers are igb, the guest get only 
get one  IP.
   2. When assign two NICs, one driver is igb, another is ixgbe, the guest 
can get two IP address.
   3. UP guest can get two IP.
   4. smp guest, and assign two VFs with igb driver, the guest can get two 
IP
  addresses.

  This should be a qemu-kvm bug.
  kvm  + qemu-kvm   =  result
  18619592 + 81bdec90   =  bad 
  18619592 + b5ed4b6f   =  good

  Reproduce steps:
  
  1. start up a host with kvm kernel
  2. /root/pcistub.sh –h 08:00.0
  3. /root/pcistub.sh –h 0d:00.1
  4. qemu-system-x86_64 –m 512 –smp 2 –device pci-assign,host=0d:00.1
  –net none –device pci-assign,host=08:00.0 –net none –hda
  /root/rhel6u1.img
  5. ifconfig 

  
  Current result:
  
  Only one can work

  Expected result:
  
  Both NICs can work

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/953754/+subscriptions



[Qemu-devel] [Bug 953754] Re: one of the two assigned NICs doesn’t work in SMP guest.

2012-03-13 Thread Yongjie Ren
** Attachment added: host dmesg log
   
https://bugs.launchpad.net/qemu/+bug/953754/+attachment/2861051/+files/dmesg-host.log

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/953754

Title:
  one of the two assigned NICs doesn’t work in SMP guest.

Status in QEMU:
  New

Bug description:
  Environment:
  
  Host OS (ia32/ia32e/IA64):ia32e
  Guest OS (ia32/ia32e/IA64):ia32e
  Guest OS Type (Linux/Windows): Linux(RHEL6u1)
  kvm.git Commit:186195928e8149b27cdd603a660dace454969f2b
  qemu-kvm Commit: 81bdec908fb2be0ccaff1d4ee67956c509e440ad
  Host Kernel Version:3.3.0-rc5
  Hardware: Romley-EP, WSM-EP

  
  Bug detailed description:
  --
  SMP guest cannot get two IP addresses when assign two NICs with igb driver.
  I tried with Intel I350 and 82576 Ethernet Adapter.

  Note:
   1. when assign two NICs, both of the drivers are igb, the guest get only 
get one  IP.
   2. When assign two NICs, one driver is igb, another is ixgbe, the guest 
can get two IP address.
   3. UP guest can get two IP.
   4. smp guest, and assign two VFs with igb driver, the guest can get two 
IP
  addresses.

  This should be a qemu-kvm bug.
  kvm  + qemu-kvm   =  result
  18619592 + 81bdec90   =  bad 
  18619592 + b5ed4b6f   =  good

  Reproduce steps:
  
  1. start up a host with kvm kernel
  2. /root/pcistub.sh –h 08:00.0
  3. /root/pcistub.sh –h 0d:00.1
  4. qemu-system-x86_64 –m 512 –smp 2 –device pci-assign,host=0d:00.1
  –net none –device pci-assign,host=08:00.0 –net none –hda
  /root/rhel6u1.img
  5. ifconfig 

  
  Current result:
  
  Only one can work

  Expected result:
  
  Both NICs can work

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/953754/+subscriptions



[Qemu-devel] [Bug 953754] Re: one of the two assigned NICs doesn’t work in SMP guest.

2012-03-13 Thread Yongjie Ren
And if you try with smp=4, you may see some error info from qemu.
assigned_dev_update_msix_mmio: No such device or address
fail to set MSI-X entry number for MSIX! Invalid argument
The message is generated from the funtion assigned_dev_update_msix_mmio in
hw/device-assignment.c
1035 r = kvm_assign_set_msix_entry(kvm_state, msix_entry);
1036 if (r) {
1037 fprintf(stderr, fail to set MSI-X entry! %s\n,
strerror(-r));
1038 break;
1039 }

Some logs:
[root@vt-nhm9 jay]# qemu-system-x86_64  -m 512 -smp 4  -device
pci-assign,host=11:00.0,id=nic1 -net none -device
pci-assign,host=11:00.1,id=nic2 -net none -hda rhel6u1.qcow
Could not open option rom 'kvmvapic.bin': No such file or directory
Could not open option rom 'vapic.bin': No such file or directory
VNC server running on `::1:5900'
assigned_dev_update_msix_mmio: No such device or address
fail to set MSI-X entry number for MSIX! Invalid argument
assigned_dev_update_msix_mmio: Invalid argument
fail to set MSI-X entry number for MSIX! Invalid argument
assigned_dev_update_msix_mmio: Invalid argument
fail to set MSI-X entry number for MSIX! Invalid argument
assigned_dev_update_msix_mmio: Invalid argument
fail to set MSI-X entry number for MSIX! Invalid argument
assigned_dev_update_msix_mmio: Invalid argument

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/953754

Title:
  one of the two assigned NICs doesn’t work in SMP guest.

Status in QEMU:
  New

Bug description:
  Environment:
  
  Host OS (ia32/ia32e/IA64):ia32e
  Guest OS (ia32/ia32e/IA64):ia32e
  Guest OS Type (Linux/Windows): Linux(RHEL6u1)
  kvm.git Commit:186195928e8149b27cdd603a660dace454969f2b
  qemu-kvm Commit: 81bdec908fb2be0ccaff1d4ee67956c509e440ad
  Host Kernel Version:3.3.0-rc5
  Hardware: Romley-EP, WSM-EP

  
  Bug detailed description:
  --
  SMP guest cannot get two IP addresses when assign two NICs with igb driver.
  I tried with Intel I350 and 82576 Ethernet Adapter.

  Note:
   1. when assign two NICs, both of the drivers are igb, the guest get only 
get one  IP.
   2. When assign two NICs, one driver is igb, another is ixgbe, the guest 
can get two IP address.
   3. UP guest can get two IP.
   4. smp guest, and assign two VFs with igb driver, the guest can get two 
IP
  addresses.

  This should be a qemu-kvm bug.
  kvm  + qemu-kvm   =  result
  18619592 + 81bdec90   =  bad 
  18619592 + b5ed4b6f   =  good

  Reproduce steps:
  
  1. start up a host with kvm kernel
  2. /root/pcistub.sh –h 08:00.0
  3. /root/pcistub.sh –h 0d:00.1
  4. qemu-system-x86_64 –m 512 –smp 2 –device pci-assign,host=0d:00.1
  –net none –device pci-assign,host=08:00.0 –net none –hda
  /root/rhel6u1.img
  5. ifconfig 

  
  Current result:
  
  Only one can work

  Expected result:
  
  Both NICs can work

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/953754/+subscriptions



[Qemu-devel] [Bug 953754] Re: one of the two assigned NICs doesn’t work in SMP guest.

2012-03-13 Thread Yongjie Ren
** Attachment added: lspci -vvv  I350 NIC in guest
   
https://bugs.launchpad.net/qemu/+bug/953754/+attachment/2861056/+files/lspci-guest-I350.log

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/953754

Title:
  one of the two assigned NICs doesn’t work in SMP guest.

Status in QEMU:
  New

Bug description:
  Environment:
  
  Host OS (ia32/ia32e/IA64):ia32e
  Guest OS (ia32/ia32e/IA64):ia32e
  Guest OS Type (Linux/Windows): Linux(RHEL6u1)
  kvm.git Commit:186195928e8149b27cdd603a660dace454969f2b
  qemu-kvm Commit: 81bdec908fb2be0ccaff1d4ee67956c509e440ad
  Host Kernel Version:3.3.0-rc5
  Hardware: Romley-EP, WSM-EP

  
  Bug detailed description:
  --
  SMP guest cannot get two IP addresses when assign two NICs with igb driver.
  I tried with Intel I350 and 82576 Ethernet Adapter.

  Note:
   1. when assign two NICs, both of the drivers are igb, the guest get only 
get one  IP.
   2. When assign two NICs, one driver is igb, another is ixgbe, the guest 
can get two IP address.
   3. UP guest can get two IP.
   4. smp guest, and assign two VFs with igb driver, the guest can get two 
IP
  addresses.

  This should be a qemu-kvm bug.
  kvm  + qemu-kvm   =  result
  18619592 + 81bdec90   =  bad 
  18619592 + b5ed4b6f   =  good

  Reproduce steps:
  
  1. start up a host with kvm kernel
  2. /root/pcistub.sh –h 08:00.0
  3. /root/pcistub.sh –h 0d:00.1
  4. qemu-system-x86_64 –m 512 –smp 2 –device pci-assign,host=0d:00.1
  –net none –device pci-assign,host=08:00.0 –net none –hda
  /root/rhel6u1.img
  5. ifconfig 

  
  Current result:
  
  Only one can work

  Expected result:
  
  Both NICs can work

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