RE: [Qemu-devel] Wipe patch

[ZIGLIO, Frediano, VF-IT]

> 
> ZIGLIO, Frediano, VF-IT wrote:
> > Hi,
> >   well, this is not a definitive patch but it works. The 
> aim is to be
> > able to wipe the disk without allocating entire space. When 
> you wipe a
> > disk the program fill disk with zero bytes so disk image increase to
> > allocate all space. This just patch detect null byte writes 
> and do not
> > write all zero byte clusters.
> 
> 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?
> 
> Brad

No... as I said is not a definitive patch. I mainly wanted to see
comments on this stuff... I'm using it since some weeks and I didn't
note all that difference. Do you know any benchmark I could use?

Frediano