[sheepdog] Call to sd_truncate()

[Liu Yuan]

On Thu, Dec 12, 2013 at 11:35:50PM +0100, Hadrien KOHL wrote:
> 2013/12/12 Liu Yuan <namei.unix at gmail.com>
> 
> > On Thu, Dec 12, 2013 at 05:29:13PM +0100, Hadrien KOHL wrote:
> > > I am using the latest version of qemu (tag v1.7.0). I compiled myself
> > today
> > > to be sure. What version of sheepdog were you using? I think I compiled
> > the
> > > tag v0.7.5.
> > >
> > > Did you use the same parameters to start the virtual machine? I'm
> > > suspecting virtio to be a problem.
> > > I will make some more test tomorrow.
> > >
> >
> > I am running latest sheepdog, but I think sheepdog version is irrelevant.
> > The
> > only difference is how I started the VM, I did it as following:
> >
> > yliu at ubuntu-precise:~/sheepdog$ qemu-system-x86_64 -drive
> > file=sheepdog:test,if=virtio,format=qcow2,cache=writeback --enable-kvm -m
> > 1024 -cdrom ../isos/ubuntu-12.04.2-desktop-amd64.iso
> >
> 
> Weird. I just gave it a try with the exact same command, and I got the same
> error. The only differencesI see know are the hardware we are running the
> qemu application. The distribution used (kernel).
> 
> I also noticed one thing, the output of your command qemu-img info
> sheepdog:test returns the size of the disk. Mine doesn't:
> 
> # qemu-img info sheepdog:test
> image: sheepdog:test
> file format: qcow2
> virtual size: 10G (10737418240 bytes)
> disk size: unavailable
> cluster_size: 65536
> Format specific information:
>     compat: 1.1
>     lazy refcounts: false
> 
> I will test with the same distribution.

This means you are actually running the old QEMU than v1.7

Thanks
Yuan