Commit d688c62d authored by Dr. David Alan Gilbert's avatar Dr. David Alan Gilbert Committed by Amit Shah
Browse files

Postcopy: Avoid 0 length discards 



The discard code in migration/ram.c would send request for
zero length discards in the case where no discards were needed.
It doesn't appear to have had any bad effect.

Signed-off-by: default avatarDr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: default avatarDenis V. Lunev <den@openvz.org>
Message-id: 1465816605-29488-2-git-send-email-dgilbert@redhat.com
Message-Id: <1465816605-29488-2-git-send-email-dgilbert@redhat.com>
Signed-off-by: default avatarAmit Shah <amit.shah@redhat.com>
parent 49237b85

migration/ram.c

+3 −1
Original line number Diff line number Diff line
@@ -1557,7 +1557,9 @@ static int postcopy_send_discard_bm_ram(MigrationState *ms, 
            } else {

                discard_length = zero - one;

            }

            if (discard_length) {

                postcopy_discard_send_range(ms, pds, one, discard_length);

            }

            current = one + discard_length;

        } else {

            current = one;