Xen project Mailing List

Re: [Xen-devel] Xen 4.3 PCI passthrough possible bug

To: Mike Neiderhauser <mikeneiderhauser@xxxxxxxxx>

From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>

Date: Fri, 7 Feb 2014 13:30:56 -0500

Delivery-date: Fri, 07 Feb 2014 18:31:29 +0000

List-id: Xen developer discussion <xen-devel.lists.xen.org>

On Fri, Feb 07, 2014 at 10:53:22AM -0500, Mike Neiderhauser wrote: > I did not. I do not have the toolchain installed. I may have time later > today to try the patch. Are there any specific instructions on how to > patch the src, compile and install? There actually should be a new version of Xen 4.4-rcX which will have the fix. That might be easier for you? > > Regards > > > On Fri, Feb 7, 2014 at 10:25 AM, Konrad Rzeszutek Wilk < > konrad.wilk@xxxxxxxxxx> wrote: > > > On Thu, Feb 06, 2014 at 09:39:37AM -0500, Mike Neiderhauser wrote: > > > Hi all, > > > > > > I am attempting to do a pci passthrough of an Intel ET card (4x1G NIC) > > to a > > > HVM. I have been attempting to resolve this issue on the xen-users list, > > > but it was advised to post this issue to this list. (Initial Message - > > > > > http://lists.xenproject.org/archives/html/xen-users/2014-02/msg00036.html) > > > > > > The machine I am using as host is a Dell Poweredge server with a Xeon > > > E31220 with 4GB of ram. > > > > > > The possible bug is the following: > > > root@fiat:/var/log/xen# cat qemu-dm-ubuntu-hvm-0.log > > > char device redirected to /dev/pts/5 (label serial0) > > > qemu: hardware error: xen: failed to populate ram at 40030000 > > > .... > > > > > > I believe it may be similar to this thread > > > > > http://markmail.org/message/3zuiojywempoorxj#query:+page:1+mid:gul34vbe4uyog2d4+state:results > > > > > > > > > Additional info that may be helpful is below. > > > > Did you try the patch? > > > > > > Please let me know if you need any additional information. > > > > > > Thanks in advance for any help provided! > > > Regards > > > > > > ########################################################### > > > root@fiat:~# cat /etc/xen/ubuntu-hvm-0.cfg > > > ########################################################### > > > # Configuration file for Xen HVM > > > > > > # HVM Name (as appears in 'xl list') > > > name="ubuntu-hvm-0" > > > # HVM Build settings (+ hardware) > > > #kernel = "/usr/lib/xen-4.3/boot/hvmloader" > > > builder='hvm' > > > device_model='qemu-dm' > > > memory=1024 > > > vcpus=2 > > > > > > # Virtual Interface > > > # Network bridge to USB NIC > > > vif=['bridge=xenbr0'] > > > > > > ################### PCI PASSTHROUGH ################### > > > # PCI Permissive mode toggle > > > #pci_permissive=1 > > > > > > # All PCI Devices > > > #pci=['03:00.0', '03:00.1', '04:00.0', '04:00.1', '05:00.0', '05:00.1'] > > > > > > # First two ports on Intel 4x1G NIC > > > #pci=['03:00.0','03:00.1'] > > > > > > # Last two ports on Intel 4x1G NIC > > > #pci=['04:00.0', '04:00.1'] > > > > > > # All ports on Intel 4x1G NIC > > > pci=['03:00.0', '03:00.1', '04:00.0', '04:00.1'] > > > > > > # Brodcom 2x1G NIC > > > #pci=['05:00.0', '05:00.1'] > > > ################### PCI PASSTHROUGH ################### > > > > > > # HVM Disks > > > # Hard disk only > > > # Boot from HDD first ('c') > > > boot="c" > > > disk=['phy:/dev/ubuntu-vg/ubuntu-hvm-0,hda,w'] > > > > > > # Hard disk with ISO > > > # Boot from ISO first ('d') > > > #boot="d" > > > #disk=['phy:/dev/ubuntu-vg/ubuntu-hvm-0,hda,w', > > > 'file:/root/ubuntu-12.04.3-server-amd64.iso,hdc:cdrom,r'] > > > > > > # ACPI Enable > > > acpi=1 > > > # HVM Event Modes > > > on_poweroff='destroy' > > > on_reboot='restart' > > > on_crash='restart' > > > > > > # Serial Console Configuration (Xen Console) > > > sdl=0 > > > serial='pty' > > > > > > # VNC Configuration > > > # Only reacable from localhost > > > vnc=1 > > > vnclisten="0.0.0.0" > > > vncpasswd="" > > > > > > ########################################################### > > > Copied for xen-users list > > > ########################################################### > > > > > > It appears that it cannot obtain the RAM mapping for this PCI device. > > > > > > > > > I rebooted the Host. I ran assigned pci devices to pciback. The output > > > looks like: > > > root@fiat:~# ./dev_mgmt.sh > > > Loading Kernel Module 'xen-pciback' > > > Calling function pciback_dev for: > > > PCI DEVICE 0000:03:00.0 > > > Unbinding 0000:03:00.0 from igb > > > Binding 0000:03:00.0 to pciback > > > > > > PCI DEVICE 0000:03:00.1 > > > Unbinding 0000:03:00.1 from igb > > > Binding 0000:03:00.1 to pciback > > > > > > PCI DEVICE 0000:04:00.0 > > > Unbinding 0000:04:00.0 from igb > > > Binding 0000:04:00.0 to pciback > > > > > > PCI DEVICE 0000:04:00.1 > > > Unbinding 0000:04:00.1 from igb > > > Binding 0000:04:00.1 to pciback > > > > > > PCI DEVICE 0000:05:00.0 > > > Unbinding 0000:05:00.0 from bnx2 > > > Binding 0000:05:00.0 to pciback > > > > > > PCI DEVICE 0000:05:00.1 > > > Unbinding 0000:05:00.1 from bnx2 > > > Binding 0000:05:00.1 to pciback > > > > > > Listing PCI Devices Available to Xen > > > 0000:03:00.0 > > > 0000:03:00.1 > > > 0000:04:00.0 > > > 0000:04:00.1 > > > 0000:05:00.0 > > > 0000:05:00.1 > > > > > > ########################################################### > > > root@fiat:~# xl -vvv create /etc/xen/ubuntu-hvm-0.cfg > > > Parsing config from /etc/xen/ubuntu-hvm-0.cfg > > > WARNING: ignoring device_model directive. > > > WARNING: Use "device_model_override" instead if you really want a > > > non-default device_model > > > libxl: debug: libxl_create.c:1230:do_domain_create: ao 0x210c360: create: > > > how=(nil) callback=(nil) poller=0x210c3c0 > > > libxl: debug: libxl_device.c:257:libxl__device_disk_set_backend: Disk > > > vdev=hda spec.backend=unknown > > > libxl: debug: libxl_device.c:296:libxl__device_disk_set_backend: Disk > > > vdev=hda, using backend phy > > > libxl: debug: libxl_create.c:675:initiate_domain_create: running > > bootloader > > > libxl: debug: libxl_bootloader.c:321:libxl__bootloader_run: not a PV > > > domain, skipping bootloader > > > libxl: debug: libxl_event.c:608:libxl__ev_xswatch_deregister: watch > > > w=0x210c728: deregister unregistered > > > libxl: debug: libxl_numa.c:475:libxl__get_numa_candidate: New best NUMA > > > placement candidate found: nr_nodes=1, nr_cpus=4, nr_vcpus=3, > > > free_memkb=2980 > > > libxl: detail: libxl_dom.c:195:numa_place_domain: NUMA placement > > candidate > > > with 1 nodes, 4 cpus and 2980 KB free selected > > > xc: detail: elf_parse_binary: phdr: paddr=0x100000 memsz=0xa69a4 > > > xc: detail: elf_parse_binary: memory: 0x100000 -> 0x1a69a4 > > > xc: info: VIRTUAL MEMORY ARRANGEMENT: > > > Loader: 0000000000100000->00000000001a69a4 > > > Modules: 0000000000000000->0000000000000000 > > > TOTAL: 0000000000000000->000000003f800000 > > > ENTRY ADDRESS: 0000000000100608 > > > xc: info: PHYSICAL MEMORY ALLOCATION: > > > 4KB PAGES: 0x0000000000000200 > > > 2MB PAGES: 0x00000000000001fb > > > 1GB PAGES: 0x0000000000000000 > > > xc: detail: elf_load_binary: phdr 0 at 0x7f022c779000 -> 0x7f022c81682d > > > libxl: debug: libxl_device.c:257:libxl__device_disk_set_backend: Disk > > > vdev=hda spec.backend=phy > > > libxl: debug: libxl_event.c:559:libxl__ev_xswatch_register: watch > > > w=0x2112f48 wpath=/local/domain/0/backend/vbd/2/768/state token=3/0: > > > register slotnum=3 > > > libxl: debug: libxl_create.c:1243:do_domain_create: ao 0x210c360: > > > inprogress: poller=0x210c3c0, flags=i > > > libxl: debug: libxl_event.c:503:watchfd_callback: watch w=0x2112f48 > > > wpath=/local/domain/0/backend/vbd/2/768/state token=3/0: event > > > epath=/local/domain/0/backend/vbd/2/768/state > > > libxl: debug: libxl_event.c:647:devstate_watch_callback: backend > > > /local/domain/0/backend/vbd/2/768/state wanted state 2 still waiting > > state 1 > > > libxl: debug: libxl_event.c:503:watchfd_callback: watch w=0x2112f48 > > > wpath=/local/domain/0/backend/vbd/2/768/state token=3/0: event > > > epath=/local/domain/0/backend/vbd/2/768/state > > > libxl: debug: libxl_event.c:643:devstate_watch_callback: backend > > > /local/domain/0/backend/vbd/2/768/state wanted state 2 ok > > > libxl: debug: libxl_event.c:596:libxl__ev_xswatch_deregister: watch > > > w=0x2112f48 wpath=/local/domain/0/backend/vbd/2/768/state token=3/0: > > > deregister slotnum=3 > > > libxl: debug: libxl_event.c:608:libxl__ev_xswatch_deregister: watch > > > w=0x2112f48: deregister unregistered > > > libxl: debug: libxl_device.c:959:device_hotplug: calling hotplug script: > > > /etc/xen/scripts/block add > > > libxl: debug: libxl_dm.c:1206:libxl__spawn_local_dm: Spawning > > device-model > > > /usr/bin/qemu-system-i386 with arguments: > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: > > > /usr/bin/qemu-system-i386 > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: -xen-domid > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: 2 > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: -chardev > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: > > > socket,id=libxl-cmd,path=/var/run/xen/qmp-libxl-2,server,nowait > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: -mon > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: > > > chardev=libxl-cmd,mode=control > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: -name > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: ubuntu-hvm-0 > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: -vnc > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: 0.0.0.0:0,to=99 > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: -global > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: isa-fdc.driveA= > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: -serial > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: pty > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: -vga > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: cirrus > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: -global > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: vga.vram_size_mb=8 > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: -boot > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: order=c > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: -smp > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: 2,maxcpus=2 > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: -device > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: > > > rtl8139,id=nic0,netdev=net0,mac=00:16:3e:23:44:2c > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: -netdev > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: > > > type=tap,id=net0,ifname=vif2.0-emu,script=no,downscript=no > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: -M > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: xenfv > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: -m > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: 1016 > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: -drive > > > libxl: debug: libxl_dm.c:1208:libxl__spawn_local_dm: > > > > > file=/dev/ubuntu-vg/ubuntu-hvm-0,if=ide,index=0,media=disk,format=raw,cache=writeback > > > libxl: debug: libxl_event.c:559:libxl__ev_xswatch_register: watch > > > w=0x210c960 wpath=/local/domain/0/device-model/2/state token=3/1: > > register > > > slotnum=3 > > > libxl: debug: libxl_event.c:503:watchfd_callback: watch w=0x210c960 > > > wpath=/local/domain/0/device-model/2/state token=3/1: event > > > epath=/local/domain/0/device-model/2/state > > > libxl: debug: libxl_event.c:503:watchfd_callback: watch w=0x210c960 > > > wpath=/local/domain/0/device-model/2/state token=3/1: event > > > epath=/local/domain/0/device-model/2/state > > > libxl: debug: libxl_event.c:596:libxl__ev_xswatch_deregister: watch > > > w=0x210c960 wpath=/local/domain/0/device-model/2/state token=3/1: > > > deregister slotnum=3 > > > libxl: debug: libxl_event.c:608:libxl__ev_xswatch_deregister: watch > > > w=0x210c960: deregister unregistered > > > libxl: debug: libxl_qmp.c:707:libxl__qmp_initialize: connected to > > > /var/run/xen/qmp-libxl-2 > > > libxl: debug: libxl_qmp.c:299:qmp_handle_response: message type: qmp > > > libxl: debug: libxl_qmp.c:555:qmp_send_prepare: next qmp command: '{ > > > "execute": "qmp_capabilities", > > > "id": 1 > > > } > > > ' > > > libxl: debug: libxl_qmp.c:299:qmp_handle_response: message type: return > > > libxl: debug: libxl_qmp.c:555:qmp_send_prepare: next qmp command: '{ > > > "execute": "query-chardev", > > > "id": 2 > > > } > > > ' > > > libxl: debug: libxl_qmp.c:299:qmp_handle_response: message type: return > > > libxl: debug: libxl_qmp.c:555:qmp_send_prepare: next qmp command: '{ > > > "execute": "change", > > > "id": 3, > > > "arguments": { > > > "device": "vnc", > > > "target": "password", > > > "arg": "" > > > } > > > } > > > ' > > > libxl: debug: libxl_qmp.c:299:qmp_handle_response: message type: return > > > libxl: debug: libxl_qmp.c:555:qmp_send_prepare: next qmp command: '{ > > > "execute": "query-vnc", > > > "id": 4 > > > } > > > ' > > > libxl: debug: libxl_qmp.c:299:qmp_handle_response: message type: return > > > libxl: debug: libxl_event.c:559:libxl__ev_xswatch_register: watch > > > w=0x210e8a8 wpath=/local/domain/0/backend/vif/2/0/state token=3/2: > > register > > > slotnum=3 > > > libxl: debug: libxl_event.c:503:watchfd_callback: watch w=0x210e8a8 > > > wpath=/local/domain/0/backend/vif/2/0/state token=3/2: event > > > epath=/local/domain/0/backend/vif/2/0/state > > > libxl: debug: libxl_event.c:647:devstate_watch_callback: backend > > > /local/domain/0/backend/vif/2/0/state wanted state 2 still waiting state > > 1 > > > libxl: debug: libxl_event.c:503:watchfd_callback: watch w=0x210e8a8 > > > wpath=/local/domain/0/backend/vif/2/0/state token=3/2: event > > > epath=/local/domain/0/backend/vif/2/0/state > > > libxl: debug: libxl_event.c:643:devstate_watch_callback: backend > > > /local/domain/0/backend/vif/2/0/state wanted state 2 ok > > > libxl: debug: libxl_event.c:596:libxl__ev_xswatch_deregister: watch > > > w=0x210e8a8 wpath=/local/domain/0/backend/vif/2/0/state token=3/2: > > > deregister slotnum=3 > > > libxl: debug: libxl_event.c:608:libxl__ev_xswatch_deregister: watch > > > w=0x210e8a8: deregister unregistered > > > libxl: debug: libxl_device.c:959:device_hotplug: calling hotplug script: > > > /etc/xen/scripts/vif-bridge online > > > libxl: debug: libxl_device.c:959:device_hotplug: calling hotplug script: > > > /etc/xen/scripts/vif-bridge add > > > libxl: debug: libxl_qmp.c:707:libxl__qmp_initialize: connected to > > > /var/run/xen/qmp-libxl-2 > > > libxl: debug: libxl_qmp.c:299:qmp_handle_response: message type: qmp > > > libxl: debug: libxl_qmp.c:555:qmp_send_prepare: next qmp command: '{ > > > "execute": "qmp_capabilities", > > > "id": 1 > > > } > > > ' > > > libxl: debug: libxl_qmp.c:299:qmp_handle_response: message type: return > > > libxl: debug: libxl_qmp.c:555:qmp_send_prepare: next qmp command: '{ > > > "execute": "device_add", > > > "id": 2, > > > "arguments": { > > > "driver": "xen-pci-passthrough", > > > "id": "pci-pt-03_00.0", > > > "hostaddr": "0000:03:00.0" > > > } > > > } > > > ' > > > libxl: error: libxl_qmp.c:454:qmp_next: Socket read error: Connection > > reset > > > by peer > > > libxl: error: libxl_qmp.c:702:libxl__qmp_initialize: Connection error: > > > Connection refused > > > libxl: error: libxl_qmp.c:702:libxl__qmp_initialize: Connection error: > > > Connection refused > > > libxl: error: libxl_qmp.c:702:libxl__qmp_initialize: Connection error: > > > Connection refused > > > libxl: debug: libxl_pci.c:81:libxl__create_pci_backend: Creating pci > > backend > > > libxl: debug: libxl_event.c:1737:libxl__ao_progress_report: ao 0x210c360: > > > progress report: ignored > > > libxl: debug: libxl_event.c:1569:libxl__ao_complete: ao 0x210c360: > > > complete, rc=0 > > > libxl: debug: libxl_event.c:1541:libxl__ao__destroy: ao 0x210c360: > > destroy > > > Daemon running with PID 3214 > > > xc: debug: hypercall buffer: total allocations:793 total releases:793 > > > xc: debug: hypercall buffer: current allocations:0 maximum allocations:4 > > > xc: debug: hypercall buffer: cache current size:4 > > > xc: debug: hypercall buffer: cache hits:785 misses:4 toobig:4 > > > > > > ########################################################### > > > root@fiat:/var/log/xen# cat qemu-dm-ubuntu-hvm-0.log > > > char device redirected to /dev/pts/5 (label serial0) > > > qemu: hardware error: xen: failed to populate ram at 40030000 > > > CPU #0: > > > EAX=00000000 EBX=00000000 ECX=00000000 EDX=00000633 > > > ESI=00000000 EDI=00000000 EBP=00000000 ESP=00000000 > > > EIP=0000fff0 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=1 > > > ES =0000 00000000 0000ffff 00009300 > > > CS =f000 ffff0000 0000ffff 00009b00 > > > SS =0000 00000000 0000ffff 00009300 > > > DS =0000 00000000 0000ffff 00009300 > > > FS =0000 00000000 0000ffff 00009300 > > > GS =0000 00000000 0000ffff 00009300 > > > LDT=0000 00000000 0000ffff 00008200 > > > TR =0000 00000000 0000ffff 00008b00 > > > GDT= 00000000 0000ffff > > > IDT= 00000000 0000ffff > > > CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000 > > > DR0=00000000 DR1=00000000 DR2=00000000 DR3=00000000 > > > DR6=ffff0ff0 DR7=00000400 > > > EFER=0000000000000000 > > > FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 > > > FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 > > > FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 > > > FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 > > > FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 > > > XMM00=00000000000000000000000000000000 > > > XMM01=00000000000000000000000000000000 > > > XMM02=00000000000000000000000000000000 > > > XMM03=00000000000000000000000000000000 > > > XMM04=00000000000000000000000000000000 > > > XMM05=00000000000000000000000000000000 > > > XMM06=00000000000000000000000000000000 > > > XMM07=00000000000000000000000000000000 > > > CPU #1: > > > EAX=00000000 EBX=00000000 ECX=00000000 EDX=00000633 > > > ESI=00000000 EDI=00000000 EBP=00000000 ESP=00000000 > > > EIP=0000fff0 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=1 > > > ES =0000 00000000 0000ffff 00009300 > > > CS =f000 ffff0000 0000ffff 00009b00 > > > SS =0000 00000000 0000ffff 00009300 > > > DS =0000 00000000 0000ffff 00009300 > > > FS =0000 00000000 0000ffff 00009300 > > > GS =0000 00000000 0000ffff 00009300 > > > LDT=0000 00000000 0000ffff 00008200 > > > TR =0000 00000000 0000ffff 00008b00 > > > GDT= 00000000 0000ffff > > > IDT= 00000000 0000ffff > > > CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000 > > > DR0=00000000 DR1=00000000 DR2=00000000 DR3=00000000 > > > DR6=ffff0ff0 DR7=00000400 > > > EFER=0000000000000000 > > > FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 > > > FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 > > > FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 > > > FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 > > > FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 > > > XMM00=00000000000000000000000000000000 > > > XMM01=00000000000000000000000000000000 > > > XMM02=00000000000000000000000000000000 > > > XMM03=00000000000000000000000000000000 > > > XMM04=00000000000000000000000000000000 > > > XMM05=00000000000000000000000000000000 > > > XMM06=00000000000000000000000000000000 > > > XMM07=00000000000000000000000000000000 > > > > > > ########################################################### > > > /etc/default/grub > > > GRUB_DEFAULT="Xen 4.3-amd64" > > > GRUB_HIDDEN_TIMEOUT=0 > > > GRUB_HIDDEN_TIMEOUT_QUIET=true > > > GRUB_TIMEOUT=10 > > > GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` > > > GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" > > > GRUB_CMDLINE_LINUX="" > > > # biosdevname=0 > > > GRUB_CMDLINE_XEN="dom0_mem=1024M dom0_max_vcpus=1" > > > > > _______________________________________________ > > > Xen-devel mailing list > > > Xen-devel@xxxxxxxxxxxxx > > > http://lists.xen.org/xen-devel > > > > 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