Re: [PATCH v4 04/21] s390x/pv: Convert to ram_block_discard_disable()

[Cornelia Huck]

On Wed, 10 Jun 2020 13:54:02 +0200
David Hildenbrand <david@redhat.com> wrote:

> Discarding RAM does not work as expected with protected VMs. Let's
> switch to ram_block_discard_disable() for now, as we want to get rid
> of qemu_balloon_inhibit(). Note that it will currently never fail, but
> might fail in the future with new technologies (e.g., virtio-mem).
> 
> Cc: Richard Henderson <rth@twiddle.net>
> Cc: Cornelia Huck <cohuck@redhat.com>
> Cc: Halil Pasic <pasic@linux.ibm.com>
> Cc: Christian Borntraeger <borntraeger@de.ibm.com>
> Cc: Janosch Frank <frankja@linux.ibm.com>
> Signed-off-by: David Hildenbrand <david@redhat.com>
> ---
>  hw/s390x/s390-virtio-ccw.c | 22 +++++++++++++---------
>  1 file changed, 13 insertions(+), 9 deletions(-)

Did not review in detail, but looks sane. Would like to see a sanity
check and ack from folks with access to a PV setup.

Acked-by: Cornelia Huck <cohuck@redhat.com>