Re: [fedora-virt] libguestfs tests running much slower

["Daniel P. Berrange" <berrange redhat com>]

On Thu, Jul 02, 2009 at 02:38:33PM +0100, Richard W.M. Jones wrote:
> On Wed, Jul 01, 2009 at 06:23:14PM +0100, Matthew Booth wrote:
> > This is only subjective, and could yet be something entirely random on  
> > my machine. However, I just pulled changes  
> > 3d15f7e652340777514ff30c3cfc560a90b612ec..99e28249d52ca5495b636e14ae3e4387ee62c8fe 
> > and now 'make check' runs a *lot* slower. I'm guessing maybe 5-10 times  
> > slower. Is it just me?
> 
> It turns out that two commands take a lot longer to run
> with a virtio backend than with an IDE backend.  They are:
> 
> mkfs.ext2
> zerofree
> 
> At the moment I have no idea why this is.

We've had that reported with F11 + virtio + sparse files, but unable to
reliably reproduce it thus far, so no resolution on the bug...

  https://bugzilla.redhat.com/show_bug.cgi?id=504376

"F-11 guest takes 45 minutes in mke2fs for 8gb fs on virtio disk with a sparse backing file"

Regards,
Daniel
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