Re: [libvirt] [PATCH 3/3] Add volume zeroing
On 02/15/2010 10:29 PM, David Allan wrote:
* If the volume is a sparse file and the fiemap ioctl is available,
use fiemap to locate the volume's extents.
What about for a sparse file doing just
ftruncate (fd, 0);
ftruncate (fd, st.st_size);
?
It's already sparse, it doesn't hurt to make it _more_ sparse.
Paolo