From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932667AbcLIExD (ORCPT ); Thu, 8 Dec 2016 23:53:03 -0500 Received: from mga11.intel.com ([192.55.52.93]:41408 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932429AbcLIExC (ORCPT ); Thu, 8 Dec 2016 23:53:02 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,323,1477983600"; d="scan'208";a="200701481" Subject: Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration To: "Li, Liang Z" , 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> <20161207202824.GH28786@redhat.com> 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" From: Dave Hansen Message-ID: <060287c7-d1af-45d5-70ea-ad35d4bbeb84@intel.com> Date: Thu, 8 Dec 2016 20:53:00 -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: 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 12/08/2016 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. 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. From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Hansen Subject: Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration Date: Thu, 8 Dec 2016 20:53:00 -0800 Message-ID: <060287c7-d1af-45d5-70ea-ad35d4bbeb84@intel.com> 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> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: "mhocko@suse.com" , "kvm@vger.kernel.org" , "mst@redhat.com" , "qemu-devel@nongnu.org" , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "kirill.shutemov@linux.intel.com" , "pbonzini@redhat.com" , "akpm@linux-foundation.org" , "virtualization@lists.linux-foundation.org" , "dgilbert@redhat.com" To: "Li, Liang Z" , Andrea Arcangeli Return-path: In-Reply-To: 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 List-Id: kvm.vger.kernel.org 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. 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. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f197.google.com (mail-pf0-f197.google.com [209.85.192.197]) by kanga.kvack.org (Postfix) with ESMTP id 978096B025E for ; Thu, 8 Dec 2016 23:53:03 -0500 (EST) Received: by mail-pf0-f197.google.com with SMTP id a8so8163476pfg.0 for ; Thu, 08 Dec 2016 20:53:03 -0800 (PST) Received: from mga07.intel.com (mga07.intel.com. [134.134.136.100]) by mx.google.com with ESMTPS id o10si31950437pli.35.2016.12.08.20.53.01 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 08 Dec 2016 20:53:02 -0800 (PST) Subject: Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration 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> From: Dave Hansen Message-ID: <060287c7-d1af-45d5-70ea-ad35d4bbeb84@intel.com> Date: Thu, 8 Dec 2016 20:53:00 -0800 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: "Li, Liang Z" , 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" 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. 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. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54451) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cFDBC-0002Ex-S8 for qemu-devel@nongnu.org; Thu, 08 Dec 2016 23:53:07 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cFDB9-0000EH-Qs for qemu-devel@nongnu.org; Thu, 08 Dec 2016 23:53:06 -0500 Received: from mga11.intel.com ([192.55.52.93]:3553) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cFDB9-0000Cy-Gr for qemu-devel@nongnu.org; Thu, 08 Dec 2016 23:53:03 -0500 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> From: Dave Hansen Message-ID: <060287c7-d1af-45d5-70ea-ad35d4bbeb84@intel.com> Date: Thu, 8 Dec 2016 20:53:00 -0800 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Li, Liang Z" , 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" 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. 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.