From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932708AbcLGSwx (ORCPT ); Wed, 7 Dec 2016 13:52:53 -0500 Received: from mga09.intel.com ([134.134.136.24]:36951 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932501AbcLGSww (ORCPT ); Wed, 7 Dec 2016 13:52:52 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,315,1477983600"; d="scan'208";a="909793652" Subject: Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration To: Andrea Arcangeli References: <1480495397-23225-1-git-send-email-liang.z.li@intel.com> <0b18c636-ee67-cbb4-1ba3-81a06150db76@redhat.com> <0b83db29-ebad-2a70-8d61-756d33e33a48@intel.com> <2171e091-46ee-decd-7348-772555d3a5e3@redhat.com> <20161207183817.GE28786@redhat.com> Cc: David Hildenbrand , "Li, Liang Z" , "kvm@vger.kernel.org" , "mhocko@suse.com" , "mst@redhat.com" , "linux-kernel@vger.kernel.org" , "qemu-devel@nongnu.org" , "linux-mm@kvack.org" , "dgilbert@redhat.com" , "pbonzini@redhat.com" , "akpm@linux-foundation.org" , "virtualization@lists.linux-foundation.org" , "kirill.shutemov@linux.intel.com" From: Dave Hansen Message-ID: <3954fe69-15ac-43eb-e14b-e2bfe976be33@intel.com> Date: Wed, 7 Dec 2016 10:44:31 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: <20161207183817.GE28786@redhat.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/07/2016 10:38 AM, Andrea Arcangeli wrote: >> > and leaves room for the bitmap size to be encoded as well, if we decide >> > we need a bitmap in the future. > How would a bitmap ever be useful with very large page-order? Please, guys. Read the patches. *Please*. The current code doesn't even _use_ a bitmap.