[libvirt-users] sr-iov on Intel 82576 and rhel 7 - would not work

[lejeczek]

hi everybody

a windows kvm guest would not start, process gets killed with:

Out of memory: Kill process 21984 (qemu-kvm) score 44 or 
sacrifice child

I really don't know where/what I might be missing, config 
seems fine, everything looks ok - I only am not sure, do I 
need to first stub a SR-IOV device like regular passthrough?

I'm trying sr-iov, having one NIC left to the host and the 
second give to a pool.
Then I have

in a guest:

     <interface type='network'>
       <mac address='52:54:00:99:df:43'/>
       <source network='passthrough-pool'/>
       <model type='rtl8139'/>
       <address type='pci' domain='0x0000' bus='0x00' 
slot='0x07' function='0x0'/>
     </interface>

and the net:

<network>
   <name>passthrough-pool</name>
   <uuid>dd5b4aa3-7c46-4874-a17f-6c0582738bd5</uuid>
   <forward mode='hostdev' managed='yes'>
     <pf dev='enp2s0f1'/>
   </forward>
</network>

----
02:00.0 Ethernet controller: Intel Corporation 82576 Gigabit 
Network Connection (rev 01)
     Subsystem: Super Micro Computer Inc Device 10c9
     Flags: bus master, fast devsel, latency 0, IRQ 40
     Memory at dfce0000 (32-bit, non-prefetchable) [size=128K]
     Memory at dfcc0000 (32-bit, non-prefetchable) [size=128K]
     I/O ports at a800 [size=32]
     Memory at dfc9c000 (32-bit, non-prefetchable) [size=16K]
     Expansion ROM at dfca0000 [disabled] [size=128K]
     Capabilities: [40] Power Management version 3
     Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
     Capabilities: [70] MSI-X: Enable+ Count=10 Masked-
     Capabilities: [a0] Express Endpoint, MSI 00
     Capabilities: [100] Advanced Error Reporting
     Capabilities: [140] Device Serial Number 
00-25-90-ff-ff-72-bb-e2
     Capabilities: [150] Alternative Routing-ID 
Interpretation (ARI)
     Capabilities: [160] Single Root I/O Virtualization (SR-IOV)
     Kernel driver in use: igb
02:00.1 Ethernet controller: Intel Corporation 82576 Gigabit 
Network Connection (rev 01)
     Subsystem: Super Micro Computer Inc Device 10c9
     Flags: bus master, fast devsel, latency 0, IRQ 41
     Memory at dfc20000 (32-bit, non-prefetchable) [size=128K]
     Memory at dfc00000 (32-bit, non-prefetchable) [size=128K]
     I/O ports at a400 [size=32]
     Memory at dfbdc000 (32-bit, non-prefetchable) [size=16K]
     Expansion ROM at dfbe0000 [disabled] [size=128K]
     Capabilities: [40] Power Management version 3
     Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
     Capabilities: [70] MSI-X: Enable+ Count=10 Masked-
     Capabilities: [a0] Express Endpoint, MSI 00
     Capabilities: [100] Advanced Error Reporting
     Capabilities: [140] Device Serial Number 
00-25-90-ff-ff-72-bb-e2
     Capabilities: [150] Alternative Routing-ID 
Interpretation (ARI)
     Capabilities: [160] Single Root I/O Virtualization (SR-IOV)
     Kernel driver in use: igb