[Qemu-discuss] VM get 'insufficient system resources exist to complete the requested service' error.

[John Y.]

I created a kvm virtual machine with windows 7 using qemu2.5. 

I controlled the vm by spice and do some normal things in the vm, such as file editing, visit websites.

I felled my vm run slowly after few days and I got 'insufficient system resources exist to complete the requested service' when I tried to open Task Manager or login the system.

1. How can I solve this problem?

2. How can I improve the performance of vm with window7 (Have some confuguration of qemu, guest or host system need to pay attention to)?

Here are the information:

qemu version:

QEMU emulator version 2.5.1.1, Copyright (c) 2003-2008 Fabrice Bellard

uname -a

Linux server01 4.2.0-1.el7.elrepo.x86_64 #1 SMP Sun Aug 30 21:25:29 EDT 2015 x86_64 x86_64 x86_64 GNU/Linux

libvirt.xml:

<domain xmlns:qemu="http://libvirt.org/schemas/domain/qemu/1.0" type="kvm">  

  <name>win7_001</name>     

  <os> 

    <type arch="x86_64" machine="pc-i440fx-1.7">hvm</type> 

  </os>  

  <features> 

    <acpi/>  

    <apic/>  

    <pae/> 

  </features> 

  <clock offset="localtime"/>  

  <on_poweroff>destroy</on_poweroff>  

  <on_reboot>restart</on_reboot>  

  <on_crash>destroy</on_crash>  

  <vcpu current="2">2</vcpu>  

  <cpu> 

    <topology sockets="1" cores="2" threads="1"/> 

  </cpu>

  <memory>4194304</memory>  

  <currentMemory>4194304</currentMemory>  

  <devices> 

    <emulator>/root/qemu25/x86_64-softmmu/qemu-system-x86_64</emulator>  

    <disk device="disk" type="file"> 

      <driver name="qemu" type="qcow2" cache="none"/>  

      <source file="/root/vm/wind7_01/win7.qcow2/>  

      <target bus="virtio" dev="vda"/> 

    </disk>  

    <disk type="file" device="cdrom"> 

      <source dev=""/>  

      <target dev="hdc" bus="ide"/> 

    </disk>  

    <serial type="pty"> 

      <source path="/dev/pts/1"/>  

      <target port="0"/> 

    </serial>  

    <input type="tablet" bus="usb"/>  

    <input type="mouse" bus="ps2"/>  

    <controller type="usb" index="0" model="ich9-ehci1"> 

      <alias name="usb0"/> 

    </controller>  

    <controller type="usb" index="0" model="ich9-uhci1"> 

      <alias name="usb0"/>  

      <master startport="0"/> 

    </controller>  

    <controller type="usb" index="0" model="ich9-uhci2"> 

      <alias name="usb0"/>  

      <master startport="2"/> 

    </controller>  

    <controller type="usb" index="0" model="ich9-uhci3"> 

      <alias name="usb0"/>  

      <master startport="4"/> 

    </controller>  

    <redirdev bus="usb" type="spicevmc"> 

      <alias name="redir0"/> 

    </redirdev>  

    <redirdev bus="usb" type="spicevmc"> 

      <alias name="redir1"/> 

    </redirdev>  

    <redirdev bus="usb" type="spicevmc"> 

      <alias name="redir2"/> 

    </redirdev>  

    <redirdev bus="usb" type="spicevmc"> 

      <alias name="redir3"/> 

    </redirdev>  

    <graphics type="spice" autoport="yes" listen='0.0.0.0' keymap='en-us'/>

    <sound model="ac97"/>  

    <video> 

      <model type="qxl" ram="65536" vram="65536" heads="1"/> 

    </video>  

    <channel type="unix"> 

      <source mode="bind"/>  

      <target type="virtio" name="org.qemu.guest_agent.0"/> 

    </channel>  

    <interface type="bridge">

      <mac address="fa:16:3e:6f:55:5b"/>

      <source bridge="virtio"/>

      <model type="virtio"/>

    </interface>

  </devices>  

  <qemu:commandline> 

    <qemu:arg value="-cpu"/>  

    <qemu:arg value="host"/> 

  </qemu:commandline> 

</domain>

Regards

John.