我正在嘗試透過 virt-manager（和 virsh 命令列）使用 libvirt 和 KVM 設定具有大頁支援的虛擬機，但在網域 XML 中啟用該選項時出現錯誤。不知道問題出在哪裡。
我正在使用以下軟體包（utopic 存儲庫）：
- libvirt-bin 1.2.8-0ubuntu11
- qemu-kvm 2.1+dfsg-4ubuntu6
我已經配置了大頁面如下指導。以下是有關當前配置的一些資訊：
chaicko@gauss:~$ cat /proc/mounts | grep huge
hugetlbfs /dev/hugepages hugetlbfs rw,relatime,mode=1770,gid=126 0 0
cgroup /sys/fs/cgroup/hugetlb cgroup rw,relatime,hugetlb,release_agent=/run/cgmanager/agents/cgm-release-agent.hugetlb 0 0
chaicko@gauss:~$ hugeadm --explain
Total System Memory: 15808 MB
Mount Point Options
/dev/hugepages rw,relatime,mode=1770,gid=126
Huge page pools:
Size Minimum Current Maximum Default
2097152 2176 2176 2176 *
Huge page sizes with configured pools:
2097152
chaicko@gauss:~$ getent group kvm
kvm:x:126:chaicko
這是域 XML：
<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
<name>win8</name>
<uuid>b85bbb9a-745f-4293-a990-1e1726240ef0</uuid>
<memory unit='KiB'>4194304</memory>
<currentMemory unit='KiB'>4194304</currentMemory>
<memoryBacking>
<hugepages/>
</memoryBacking>
<vcpu placement='static'>4</vcpu>
<os>
<type arch='x86_64' machine='pc-i440fx-utopic'>hvm</type>
</os>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<cpu mode='custom' match='exact'>
<model fallback='allow'>Haswell</model>
</cpu>
<clock offset='localtime'>
<timer name='rtc' tickpolicy='catchup'/>
<timer name='pit' tickpolicy='delay'/>
<timer name='hpet' present='no'/>
</clock>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<pm>
<suspend-to-mem enabled='no'/>
<suspend-to-disk enabled='no'/>
</pm>
<devices>
<emulator>/usr/bin/qemu-system-x86_64</emulator>
<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none' io='native'/>
<source dev='/dev/vmvg/win8'/>
<target dev='vda' bus='virtio'/>
<boot order='2'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/home/chaicko/Downloads/virtio-win-0.1-81.iso'/>
<target dev='hda' bus='ide'/>
<readonly/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/home/chaicko/Downloads/WINDOWS_8.1_Pro_X64/Windows_8.1_Pro_X64_Games4theworld.org.iso'/>
<target dev='hdb' bus='ide'/>
<readonly/>
<boot order='1'/>
<address type='drive' controller='0' bus='0' target='0' unit='1'/>
</disk>
<controller type='usb' index='0' model='ich9-ehci1'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x7'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci1'>
<master startport='0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0' multifunction='on'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci2'>
<master startport='2'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x1'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci3'>
<master startport='4'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x2'/>
</controller>
<controller type='pci' index='0' model='pci-root'/>
<controller type='ide' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
</controller>
<controller type='virtio-serial' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</controller>
<controller type='scsi' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
</controller>
<interface type='network'>
<mac address='52:54:00:48:ca:09'/>
<source network='default'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
<serial type='pty'>
<target port='0'/>
</serial>
<console type='pty'>
<target type='serial' port='0'/>
</console>
<channel type='spicevmc'>
<target type='virtio' name='com.redhat.spice.0'/>
<address type='virtio-serial' controller='0' bus='0' port='1'/>
</channel>
<input type='tablet' bus='usb'/>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<graphics type='spice' autoport='yes'/>
<sound model='ich6'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</sound>
<video>
<model type='qxl' ram='65536' vram='65536' heads='1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
</video>
<hostdev mode='subsystem' type='pci' managed='yes'>
<source>
<address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
</source>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>
</hostdev>
<hostdev mode='subsystem' type='pci' managed='yes'>
<source>
<address domain='0x0000' bus='0x01' slot='0x00' function='0x1'/>
</source>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/>
</hostdev>
<redirdev bus='usb' type='spicevmc'>
</redirdev>
<redirdev bus='usb' type='spicevmc'>
</redirdev>
<redirdev bus='usb' type='spicevmc'>
</redirdev>
<redirdev bus='usb' type='spicevmc'>
</redirdev>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
</memballoon>
</devices>
<qemu:commandline>
<qemu:arg value='-drive'/>
<qemu:arg value='if=pflash,readonly,format=raw,file=/usr/share/qemu/OVMF.fd'/>
</qemu:commandline>
</domain>
如果我刪除該<memoryBacking>選項，那麼它會起作用，但如果沒有，它會失敗並出現以下錯誤：
error: internal error: process exited while connecting to monitor:
我還取消了 /etc/libvirt/qemu.conf 中以下行的註釋
hugetlbfs_mount = "/dev/hugepages"
我究竟做錯了什麼？
謝謝
答案1
回答我自己的問題，以便在libvirtin中使用大頁面烏班圖KVM_HUGEPAGES=1，你只需在文件中設定/etc/default/qemu-kvm並重新啟動即可。
這與這個有關錯誤修復。