From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46659) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fQD8l-0005Kb-5B for qemu-devel@nongnu.org; Tue, 05 Jun 2018 10:40:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fQD8k-0006Az-JA for qemu-devel@nongnu.org; Tue, 05 Jun 2018 10:40:51 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:37184 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fQD8k-0006Ap-Ev for qemu-devel@nongnu.org; Tue, 05 Jun 2018 10:40:50 -0400 Date: Tue, 5 Jun 2018 17:40:46 +0300 From: "Michael S. Tsirkin" Message-ID: <20180605173952-mutt-send-email-mst@kernel.org> References: <1524550428-27173-1-git-send-email-wei.w.wang@intel.com> <20180601045824.GH14867@xz-mi> <5B10F412.8050900@intel.com> <20180601104005.GL14867@xz-mi> <20180601153328.GC2531@work-vm> <20180605064240.GA9216@xz-mi> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180605064240.GA9216@xz-mi> Subject: Re: [Qemu-devel] [PATCH v7 0/5] virtio-balloon: free page hint reporting support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Xu Cc: "Dr. David Alan Gilbert" , Wei Wang , qemu-devel@nongnu.org, virtio-dev@lists.oasis-open.org, quintela@redhat.com, yang.zhang.wz@gmail.com, quan.xu0@gmail.com, liliang.opensource@gmail.com, pbonzini@redhat.com, nilal@redhat.com On Tue, Jun 05, 2018 at 02:42:40PM +0800, Peter Xu wrote: > > I think the answer is no - it doesn't matter; by telling the hypervisor > > the page is 'free' the kernel gives freedom to the hypervisor to > > discard the page contents. > > Yeh it seems so. Well not exactly. I replied to parent with a clarification.