Description of problem:
rerror/werror require support in the underlying device model.
Currently, only ide-hd, ide-cd, ide-drive (legacy), scsi-hd, scsi-cd,
scsi-disk (legacy), scsi-block (partially[*]), virtio-blk-device do.
Device models that do not support it: isa-fdc, cfi.pflash01,
scsi-generic, nvme, ...
Steps to Reproduce:
1. Peruse -help, qemu.1 and qemu-doc.html on rerror/werror.
Not a word on rerror/werror working only with some device models.
Restrictions get explained adequately along with the possible values
[*] Should work as long as you stick to plain read/write. Fancy stuff
like write same gets tricky.
> Component: qemu-kvm → qemu-kvm-rhev
Revert, we already have Bug 1179995 (sorry).
WONTFIX in qemu-kvm due to capacity. We don't support direct invocation of qemu-kvm in RHEL anyway.