RE: [Qemu-devel] Wipe patch

[ZIGLIO, Frediano, VF-IT]

> 
> Avi Kivity wrote:
> 
> >> This _looks_ like it would severely impact cpu load during a write.
> >> Have you done any testing to determine if this is likely 
> to impact a 
> >> normal usage scenario?
> > 
> > Why would it? In most cases, the zero test would terminate quickly, 
> > without accessing the entire cluster.
> > 
> 
> Good point, when I looked at it my brain was in zero wipe 
> mode.. which would be slow but then a 
> bucketload faster than writing the actual cluster to disk..
> 
> Brad

I use the patch to reduce image size. I use a RIP (repair is possible)
ISO image to boot a small Linux system where I can issue ntfswipe (or
any other wipe command). Than I can recompress image with qemu-img.

freddy77