Am 27.04.2011 15:27, schrieb Stefan Hajnoczi: > From: Anthony Liguori <aligu...@us.ibm.com> > > When creating an image using qemu-img, just pass '-o copy_on_read' and then > whenever QED reads from a backing file, it will write the block to the QED > file after the read completes ensuring that you only fetch from the backing > device once.
As discussed previously, this is not the right primary interface. Also, the patch still seems to be broken with respect to concurrent writes. Kevin
