On Fri, Apr 29, 2011 at 1:14 PM, Kevin Wolf <kw...@redhat.com> wrote: > 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.
Both good points, I really wanted to give a full RFC patch series to show all the code that has been written today. But your points need to be addressed for the next version. Stefan
