search for: memballoon

Hello all, I find this curious behavior that libvirt will automatically insert a USB controller and a memballoon virtio driver into the domain's XML, when defineXML is called. IOW, the original XML did not have these 2 devices but they are present right after defineXML is called. Why should libvirt add a USB controller? DETAILS: Here is a little Python snippet to show that behavior: import libvirt conn...

On 11/30/2015 07:30 PM, Sundar Nadathur wrote: > Hello all, > > I find this curious behavior that libvirt will automatically insert a USB > controller and a memballoon virtio driver into the domain?s XML, when > defineXML is called. IOW, the original XML did not have these 2 devices but > they are present right after defineXML is called. Why should libvirt add a USB > controller? > > Historical compatibility. Older qemu would provide these devi...

...virtio_balloon then > @@ -454,6 +457,9 @@ let rec create_ovf source targets guestcaps inspect > e "rasd:ResourceType" [] [PCData "0"]; > e "Type" [] [PCData "balloon"]; > e "Device" [] [PCData "memballoon"]; > + e "SpecParams" [] [ > + e "model" [] [PCData "virtio"] > + ] Are they needed in both the flavours of OVF? (Not a problem for me, just asking to understand it better.) -- Pino Toscano

...some devices by default. Indicate to libvirt + * that we don't want them. + */ + start_element ("controller") { + attribute ("type", "usb"); + attribute ("model", "none"); + } end_element (); + + start_element ("memballoon") { + attribute ("model", "none"); + } end_element (); + } end_element (); /* </devices> */ return 0; -- 2.7.4

...if guestcaps.gcaps_virtio_balloon then @@ -454,6 +457,9 @@ let rec create_ovf source targets guestcaps inspect e "rasd:ResourceType" [] [PCData "0"]; e "Type" [] [PCData "balloon"]; e "Device" [] [PCData "memballoon"]; + e "SpecParams" [] [ + e "model" [] [PCData "virtio"] + ] ] ); -- 2.13.2

...if guestcaps.gcaps_virtio_balloon then @@ -454,6 +457,9 @@ let rec create_ovf source targets guestcaps inspect e "rasd:ResourceType" [] [PCData "0"]; e "Type" [] [PCData "balloon"]; e "Device" [] [PCData "memballoon"]; + e "SpecParams" [] [ + e "model" [] [PCData "virtio"] + ] ] ); -- 2.13.2

...> > @@ -454,6 +457,9 @@ let rec create_ovf source targets guestcaps inspect > > e "rasd:ResourceType" [] [PCData "0"]; > > e "Type" [] [PCData "balloon"]; > > e "Device" [] [PCData "memballoon"]; > > + e "SpecParams" [] [ > > + e "model" [] [PCData "virtio"] > > + ] > > Are they needed in both the flavours of OVF? (Not a problem for me, > just asking to understand it better.) They are nee...

Hi I have just started to investigate the possibilities of resizing memory for my kvm virtual machines on the fly. It works just fine with virsh setmem and that's great. Now, what I'm wondering about is the <memory> directive in the xml domain definition. Why would I not just set that to the size of available RAM in the host machine? Am I missing some nuance or finesse to the

...9; slot='0x03' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </memballoon> </devices> </domain> Is somebody else experiencing the same problem? I'm not sure even that the clone...

...type='vnc' port='-1' autoport='yes'/> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </memballoon> </devices> </domain> My libvirt version is 1.2.9, and qemu is 2.1.2. Thanks for your help, Olivier

...sb'/> -- <model type='virtio'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x08' slot='0x00' function='0x0'/> </interface> <serial type='pty'> -- <memballoon model='virtio'> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x07' slot='0x00' function='0x0'/> </memballoon> </devices> there is no scsi in the xml, if I define one, will it s...

...unction='0x0'/> </sound> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> <stats period='5'/> </memballoon> </devices> </domain> Helmholtz Zentrum München Helmholtz Zentrum...

...;> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0001'/> >> </interface> >> <console type='pty'> >> <target type='sclp' port='0'/> >> </console> >> <memballoon model='virtio'> >> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0003'/> >> </memballoon> >> <panic model='s390'/> >> </devices> >> </domain> >> >> The issue...

...9;ps2'/> | <graphics type='vnc' port='-1' autoport='yes'/> | <sound model='ich6'> | </sound> | | <video> | <model type='cirrus' vram='9216' heads='1'/> | </video> | | <memballoon model='virtio'> | </memballoon> | | </devices> | </domain> ##### ------------------------------------------------------------------------------------------------------------- ##### # Dumped | <domain type='kvm' id='171'> | <name>arc...

...; <model type='virtio'/> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0001'/> </interface> <console type='pty'> <target type='sclp' port='0'/> </console> <memballoon model='virtio'> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0003'/> </memballoon> <panic model='s390'/> </devices> </domain> The issue is that when I try to start it, it starts and shutdowns i...

...ata "Memory Ballooning Device"]; + e "rasd:InstanceId" [] [PCData (uuidgen ())]; + e "rasd:ResourceType" [] [PCData "0"]; + e "Type" [] [PCData "balloon"]; + e "Device" [] [PCData "memballoon"]; + ] + ]; + + push_back content_subnodes ( e "Section" ["xsi:type", "ovf:VirtualHardwareSection_Type"] !virtual_hardware_section_items -- 2.12.1

...gt; <video> <model type='vmvga' vram='9216' heads='1'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </memballoon> </devices> <seclabel type='dynamic' model='apparmo...

...; function='0x0'/> </sound> <video> <model type='vga' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </memballoon> </devices> I manually changed the <emulator>/usr/bin/qemu-system-x86_64</emulator> to <emulator&...

...unction='0x0'/> </sound> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </memballoon> </devices> </domain> TIA, Ruzsi

...t;= 1.3.4. Libvirt > + * was broken before that. > + *) > + e "backend" ["model", "random"] [PCData "/dev/urandom"] > + ] > + ); > + if guestcaps.gcaps_virtio_balloon then > + push_back devices (e "memballoon" ["model", "virtio"] []); For (unpleasant) historical reasons you'll always get a virtio balloon device added by libvirt. If you don't want balloon enabled you have to explicitly give model=none > + if guestcaps.gcaps_isa_pvpanic then > + push_back devic...