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xen-devel
Re: [Xen-devel] virsh blkstat doesn't work on HVM
You should ask libvirt-ML
http://libvirt.org/contact.html
By the way, I am looking around the the current code of libvirt.
you should check following data exist or not.
"/sys/devices/xen-backend/vbd-%d-%d/statistics/%s"
or
"/sys/devices/xen-backend/tap-%d-%d/statistics/%s"
see read_bd_stat from following
http://libvirt.org/git/?p=libvirt.git;a=blob;f=src/xen/block_stats.c
Thanks
Atsushi SAKAI
<wenche_chang@xxxxxxxxxxxx> wrote:
> Hi
>
>
>
> I tried to use virsh blkstat to get information of a block, but it returns an
> error message as shown below
>
> This function works fine in KVM, but fail in XEN.
>
> I tried XEN 3.4.3 ,4.0.0 and 4.0.1 with libvirt 0.7.1 from fedora yum server
> and 0.8.1 from libvirt .
>
> All of them are fail to get the block status.
>
> The following is the config file and error message of virsh domblkstat.
>
> Any one knows how to make this function work?
>
>
>
> [root@localhost ~]# virsh dumpxml vm1
>
> <domain type='xen' id='1'>
>
> <name>vm1</name>
>
> <uuid>12af1ed4-2f2d-f02d-9a2a-5d4f377889d5</uuid>
>
> <memory>524288</memory>
>
> <currentMemory>524288</currentMemory>
>
> <vcpu>1</vcpu>
>
> <os>
>
> <type>hvm</type>
>
> <loader>/usr/lib/xen/boot/hvmloader</loader>
>
> <boot dev='hd'/>
>
> </os>
>
> <features>
>
> <acpi/>
>
> <apic/>
>
> <pae/>
>
> </features>
>
> <clock offset='utc'/>
>
> <on_poweroff>destroy</on_poweroff>
>
> <on_reboot>restart</on_reboot>
>
> <on_crash>restart</on_crash>
>
> <devices>
>
> <emulator>/usr/lib64/xen/bin/qemu-dm</emulator>
>
> <disk type='file' device='disk'>
>
> <driver name='file'/>
>
> <source file='/var/lib/libvirt/images/vm1.img'/>
>
> <target dev='hda' bus='ide'/>
>
> </disk>
>
> <disk type='file' device='cdrom'>
>
> <target dev='hdc' bus='ide'/>
>
> <readonly/>
>
> </disk>
>
> <interface type='bridge'>
>
> <mac address='00:16:36:0f:fb:7a'/>
>
> <source bridge='eth0'/>
>
> <script path='/etc/xen/scripts/vif-bridge'/>
>
> <target dev='vif1.0'/>
>
> </interface>
>
> <serial type='pty'>
>
> <source path='/dev/pts/0'/>
>
> <target port='0'/>
>
> </serial>
>
> <console type='pty' tty='/dev/pts/0'>
>
> <source path='/dev/pts/0'/>
>
> <target port='0'/>
>
> </console>
>
> <input type='mouse' bus='ps2'/>
>
> <graphics type='vnc' port='5900' autoport='yes' keymap='en-us'/>
>
> <sound model='es1370'/>
>
> </devices>
>
> </domain>
>
>
>
> [root@localhost ~]# virsh domblkstat vm1 hda
>
> error: Failed to get block stats vm1 hda
>
> error: internal error read_bd_stats: Failed to read any block statistics
>
>
>
>
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