On 09/24/2013 07:35 AM, Peter Lieven wrote: > this patch adds a call to completely zero out a block device. > the operation is sped up by checking the block status and > only writing zeroes to the device if they currently do not > return zeroes. optionally the zero writing can be sped up > by setting the flag BDRV_REQ_MAY_UNMAP to emulate the zero > write by unmapping if the driver supports it. > > Signed-off-by: Peter Lieven <p...@kamp.de> > --- > block.c | 37 +++++++++++++++++++++++++++++++++++++ > include/block/block.h | 1 + > 2 files changed, 38 insertions(+) >
Reviewed-by: Eric Blake <ebl...@redhat.com> -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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