From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: [PATCH] virtio-balloon spec: rework VIRTIO_BALLOON_F_MUST_TELL_HOST feature, support silent deflation Date: Mon, 27 May 2013 18:09:54 +0200 Message-ID: <51A38552.9050808@redhat.com> References: <1368007813-1264-1-git-send-email-pbonzini@redhat.com> <51A381D9.5010800@redhat.com> <20130527160437.GA18270@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20130527160437.GA18270@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: "Michael S. Tsirkin" Cc: kvm@vger.kernel.org, virtualization@lists.linux-foundation.org List-Id: virtualization@lists.linuxfoundation.org Il 27/05/2013 18:04, Michael S. Tsirkin ha scritto: > I don't think we need a new feature. Hosts do not in practice > treat the feature as "negative" (that is, required), whatever the spec > says. Further, windows guests don't treat it is such either. Windows guests not treating as such is what makes the spec change work. > So if we > don't want to require all guests to tell host first, all we need to do is > admit it's not a bug. I think we want the possibility for the host to require that. > Please see > [PATCH] virtio-spec: balloon: MUST_TELL_HOST is optional > that does exactly this. That patch mandates a change in guest behavior that is not compatible with the existing Windows driver. Mine doesn't. Paolo