The problem was originally reported by "Denis V. Lunev" <firstname.lastname@example.org> as "bdrv_co_discard must mark areas dirty after writing zeroes, it must call
before_write_notifier chain to push underlying data to backup and it also
must properly fill tracked request information."
Backport the upstream 2.7 candidate patches to fix it.
Fix included in qemu-kvm-rhev-2.6.0-9.el7
Yes, I think so.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.