Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753978AbcLIFfv convert rfc822-to-8bit (ORCPT ); Fri, 9 Dec 2016 00:35:51 -0500 Received: from mga03.intel.com ([134.134.136.65]:44793 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751428AbcLIFft (ORCPT ); Fri, 9 Dec 2016 00:35:49 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,323,1477983600"; d="scan'208";a="910357157" From: "Li, Liang Z" To: "Hansen, Dave" , Andrea Arcangeli CC: David Hildenbrand , "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" Subject: RE: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration Thread-Topic: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration Thread-Index: AQHSSufi4SQjg1m8CEK5jUmkErPNiaD6HPWAgAJj94D//6QTgIAAAOqAgAAKNYCAAAnRgIAAHEuAgAAVUACAAAl0AIAClagg//+JqQCAAI6AEA== Date: Fri, 9 Dec 2016 05:35:45 +0000 Message-ID: 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> <20161207202824.GH28786@redhat.com> <060287c7-d1af-45d5-70ea-ad35d4bbeb84@intel.com> In-Reply-To: <060287c7-d1af-45d5-70ea-ad35d4bbeb84@intel.com> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-titus-metadata-40: eyJDYXRlZ29yeUxhYmVscyI6IiIsIk1ldGFkYXRhIjp7Im5zIjoiaHR0cDpcL1wvd3d3LnRpdHVzLmNvbVwvbnNcL0ludGVsMyIsImlkIjoiNTRjNjYwOTEtY2M0Yi00YWVkLWIzNjctOWQ4ZmM1NTk0NDkzIiwicHJvcHMiOlt7Im4iOiJDVFBDbGFzc2lmaWNhdGlvbiIsInZhbHMiOlt7InZhbHVlIjoiQ1RQX0lDIn1dfV19LCJTdWJqZWN0TGFiZWxzIjpbXSwiVE1DVmVyc2lvbiI6IjE1LjkuNi42IiwiVHJ1c3RlZExhYmVsSGFzaCI6ImtHM2hoWm5OS2lFTW5aMDM0eHpHRGFzQld3Rmp1TU1ncTlMVndrT2VhXC9RPSJ9 x-ctpclassification: CTP_IC x-originating-ip: [10.239.127.40] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1010 Lines: 25 > On 12/08/2016 08:45 PM, Li, Liang Z wrote: > > What's the conclusion of your discussion? It seems you want some > > statistic before deciding whether to ripping the bitmap from the ABI, > > am I right? > > I think Andrea and David feel pretty strongly that we should remove the > bitmap, unless we have some data to support keeping it. I don't feel as > strongly about it, but I think their critique of it is pretty valid. I think the > consensus is that the bitmap needs to go. > Thanks for you clarification. > The only real question IMNHO is whether we should do a power-of-2 or a > length. But, if we have 12 bits, then the argument for doing length is pretty > strong. We don't need anywhere near 12 bits if doing power-of-2. > So each item can max represent 16MB Bytes, seems not big enough, but enough for most case. Things became much more simple without the bitmap, and I like simple solution too. :) I will prepare the v6 and remove all the bitmap related stuffs. Thank you all! Liang