On Mon, Apr 29, 2019 at 12:57:41PM +0200, Kevin Wolf wrote: > make_completely_empty() is an optimisated path for bdrv_make_empty() > where completely new metadata is created inside the image file instead > of going through all clusters and discarding them. For an external data > file, however, we actually need to do discard operations on the data > file; just overwriting the qcow2 file doesn't get rid of the data. > > The necessary slow path with an explicit discard operation already > exists for other cases. Use it for external data files, too. > > Cc: qemu-sta...@nongnu.org > Signed-off-by: Kevin Wolf <kw...@redhat.com> > --- > block/qcow2.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-)
Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
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