[et-mgmt-tools] Why does not virt-install use the tap driver in HVM?

Daniel P. Berrange berrange at redhat.com
Tue Jul 3 14:19:47 UTC 2007


On Tue, Jul 03, 2007 at 11:56:57AM +0900, Nobuhiro Itou wrote:
> Hi,
> 
> I have a question.
> 
> There is the following codes in virt-install.
> 
> def get_disk(disk, size, sparse, guest, hvm, conn):
>      :
>      :
>             if d.type == virtinst.VirtualDisk.TYPE_FILE and not(hvm) and virtinst.util.is_blktap_capable():
>                 d.driver_name = virtinst.VirtualDisk.DRIVER_TAP
> 
> Why "not(hvm)"?

QEMU is incapable of using blktap disks :-(  I'm trying to work on fixes
to QEMU to make it work - obviously we want to be able to use blktap if
the HVM guest has paravirt drivers...

Dan.
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