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ba7f98126f
Since its v5.0.0 release QEMU is capable of specifying number of threads used to allocate memory. It defaults to 1, which may be too low for humongous guests with gigantic pages. In general, on QEMU cmd line level it is possible to use different number of threads per each memory-backend-* object, in practical terms it's not useful. Therefore, use <memoryBacking/> to set guest wide value and let all memory devices 'inherit' it, silently. IOW, don't introduce per device knob because that would only complicate things for a little or no benefit. Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
58 lines
1.8 KiB
XML
58 lines
1.8 KiB
XML
<domain type='kvm'>
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<name>instance-00000092</name>
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<uuid>126f2720-6f8e-45ab-a886-ec9277079a67</uuid>
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<maxMemory slots='16' unit='KiB'>1099511627776</maxMemory>
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<memory unit='KiB'>14680064</memory>
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<currentMemory unit='KiB'>14680064</currentMemory>
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<memoryBacking>
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<hugepages>
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<page size='2048' unit='KiB'/>
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</hugepages>
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<source type='memfd'/>
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<access mode='shared'/>
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<allocation mode='immediate' threads='8'/>
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</memoryBacking>
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<vcpu placement='static'>8</vcpu>
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<numatune>
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<memnode cellid='0' mode='preferred' nodeset='3'/>
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</numatune>
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<os>
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<type arch='x86_64' machine='pc-i440fx-2.3'>hvm</type>
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<boot dev='hd'/>
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</os>
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<cpu mode='custom' match='exact' check='none'>
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<model fallback='forbid'>qemu64</model>
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<topology sockets='1' dies='1' cores='8' threads='1'/>
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<numa>
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<cell id='0' cpus='0-7' memory='14680064' unit='KiB'/>
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</numa>
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</cpu>
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<clock offset='utc'/>
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<on_poweroff>destroy</on_poweroff>
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<on_reboot>restart</on_reboot>
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<on_crash>destroy</on_crash>
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<devices>
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<emulator>/usr/bin/qemu-system-x86_64</emulator>
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<controller type='usb' index='0' model='piix3-uhci'>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
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</controller>
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<controller type='pci' index='0' model='pci-root'/>
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<input type='mouse' bus='ps2'/>
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<input type='keyboard' bus='ps2'/>
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<audio id='1' type='none'/>
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<memballoon model='virtio'>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
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</memballoon>
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<memory model='nvdimm'>
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<source>
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<path>/tmp/nvdimm</path>
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</source>
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<target>
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<size unit='KiB'>523264</size>
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<node>0</node>
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</target>
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<address type='dimm' slot='0'/>
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</memory>
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</devices>
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</domain>
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