Hi,
First of all thank very much for your help,
Second, unfortunately data-plane didn't worked well, I tried to add threads
from the instructions you gave me.
Here is my full xml file, maybe you can help me to understand why it didn't
worked :
<domain type='kvm'>
<name>gen-r-vrt-105-007-RH7.0x64</name>
<uuid>8f79e97e-d452-4577-82bd-2ed903773026</uuid>
<memory unit='KiB'>2097152</memory>
<currentMemory unit='KiB'>2097152</currentMemory>
<memtune>
<hard_limit unit='KiB'>8388608</hard_limit>
</memtune>
<memoryBacking>
<locked/>
</memoryBacking>
<vcpu placement='static'>2</vcpu>
<os>
<type arch='x86_64' machine='pc-i440fx-2.5'>hvm</type>
<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>/.autodirect/mtrswgwork/roysh/git/qemu/x86_64-softmmu/qemu-system-x86_64</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='none'/>
<source file='/images/gen-r-vrt-105-007/gen-r-vrt-105-007.img'/>
<target dev='vda' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04'
function='0x0'/>
</disk>
<disk type='network' device='lun'>
<driver name='qemu' type='raw'/>
<source protocol='iscsi' name='iqn.2001-04.com.r-dcs03-tgt-3/1/iser'>
<host name='11.212.32.52' port='3260'/>
</source>
<target dev='vdb' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07'
function='0x0'/>
</disk>
<disk type='network' device='lun'>
<driver name='qemu' type='raw'/>
<source protocol='iscsi' name='iqn.2001-04.com.r-dcs03-tgt-1/1'>
<host name='11.212.32.52' port='3260'/>
</source>
<target dev='sda' bus='scsi'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<disk type='network' device='lun'>
<driver name='qemu' type='raw'/>
<source protocol='iscsi' name='iqn.2001-04.com.r-dcs03-tgt-2/1'>
<host name='11.212.32.52' port='3260'/>
</source>
<target dev='sdb' bus='scsi'/>
<address type='drive' controller='1' bus='0' target='0' unit='0'/>
</disk>
<controller type='scsi' index='0' model='virtio-scsi'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06'
function='0x0'/>
</controller>
<controller type='scsi' index='1' model='virtio-scsi'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x08'
function='0x0'/>
</controller>
<controller type='usb' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x2'/>
</controller>
<controller type='pci' index='0' model='pci-root'/>
<interface type='bridge'>
<mac address='00:50:56:28:69:07'/>
<source bridge='br0:'/>
<model type='e1000'/>
<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>
<input type='tablet' bus='usb'/>
<input type='mouse' bus='ps2'/>
<graphics 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='0x05'
function='0x0'/>
</memballoon>
</devices>
</domain>
BTW, in RH 7.2 data-plane is default if one is choosing to work with virtio?
Thank you very much,
Roy
On Thu, Jan 21, 2016 at 11:01 AM, Paolo Bonzini <[email protected]> wrote:
>
>
> On 20/01/2016 21:12, Roy Shterman wrote:
> > Hi,
> >
> > I have two questions,
> >
> > First, I'm developing for Libiscsi and trying to work with virtio-scsi
> > dataplane or even virtio-blk dataplane and it doesn't works well.
> >
> > I'm working with latest qemu and latest Libiscsi in RedHat 7 libvirt
> > package.
> >
> > my iscsi xml part is :
> >
> > virtio-blk -
> >
> > <disk type='network' device='lun'>
> > <driver name='qemu' type='raw'/>
> > <source protocol='iscsi' name='iqn.2001-04.com.r-dcs03-tgt-3/1'>
> > <host name='11.212.32.52' port='3260'/>
> > </source>
> > <target dev='vdb' bus='virtio'/>
> > <address type='pci' domain='0x0000' bus='0x00' slot='0x07'
> > function='0x0'/>
> > </disk>
> >
> > virtio-scsi -
> >
> > <disk type='network' device='lun'>
> > <driver name='qemu' type='raw'/>
> > <source protocol='iscsi' name='iqn.2001-04.com.r-dcs03-tgt-1/1>
> > <host name='11.212.32.52' port='3260'/>
> > </source>
> > <target dev='sda' bus='scsi'/>
> > <address type='drive' controller='0' bus='0' target='0' unit='0'/>
> > </disk>
> > <controller type='scsi' index='0' model='virtio-scsi'>
> > <address type='pci' domain='0x0000' bus='0x00' slot='0x06'
> > function='0x0'/>
> > </controller>
>
> There is now support for dataplane in libvirt. See
> https://libvirt.org/formatdomain.html#elementsIOThreadsAllocation and
> then you can add an iothread='NN' (NN is a number) to the <driver
> name='qemu' type='raw'/> element.
>
> > second thing, I'm trying to look for the code where QEMU allocate all
> > guest memory (2 GB) in my case.
>
> Start at memory_allocate_system_memory; ultimately you'll reach
> qemu_anon_ram_alloc which is basically an mmap.
>
> paolo
>
