From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f200.google.com (mail-pf0-f200.google.com [209.85.192.200]) by kanga.kvack.org (Postfix) with ESMTP id 93B0F6B0038 for ; Wed, 31 Aug 2016 02:28:23 -0400 (EDT) Received: by mail-pf0-f200.google.com with SMTP id o124so87645023pfg.1 for ; Tue, 30 Aug 2016 23:28:23 -0700 (PDT) Received: from mga06.intel.com (mga06.intel.com. [134.134.136.31]) by mx.google.com with ESMTPS id kv2si49168221pab.145.2016.08.30.23.28.22 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 30 Aug 2016 23:28:22 -0700 (PDT) From: "Li, Liang Z" Subject: RE: [PATCH v3 kernel 0/7] Extend virtio-balloon for fast (de)inflating & fast live migration Date: Wed, 31 Aug 2016 06:28:10 +0000 Message-ID: References: <1470638134-24149-1-git-send-email-liang.z.li@intel.com> In-Reply-To: Content-Language: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: "'Michael S. Tsirkin'" Cc: "'virtualization@lists.linux-foundation.org'" , "'linux-mm@kvack.org'" , "'virtio-dev@lists.oasis-open.org'" , "'kvm@vger.kernel.org'" , "'qemu-devel@nongnu.org'" , "'quintela@redhat.com'" , "'dgilbert@redhat.com'" , "Hansen, Dave" , "'linux-kernel@vger.kernel.org'" Hi Michael, I know you are very busy. If you have time, could you help to take a look a= t this patch set? Thanks! Liang > -----Original Message----- > From: Li, Liang Z > Sent: Thursday, August 18, 2016 9:06 AM > To: Michael S. Tsirkin > Cc: virtualization@lists.linux-foundation.org; linux-mm@kvack.org; virtio= - > dev@lists.oasis-open.org; kvm@vger.kernel.org; qemu-devel@nongnu.org; > quintela@redhat.com; dgilbert@redhat.com; Hansen, Dave; linux- > kernel@vger.kernel.org > Subject: RE: [PATCH v3 kernel 0/7] Extend virtio-balloon for fast (de)inf= lating > & fast live migration >=20 > Hi Michael, >=20 > Could you help to review this version when you have time? >=20 > Thanks! > Liang >=20 > > -----Original Message----- > > From: Li, Liang Z > > Sent: Monday, August 08, 2016 2:35 PM > > To: linux-kernel@vger.kernel.org > > Cc: virtualization@lists.linux-foundation.org; linux-mm@kvack.org; > > virtio- dev@lists.oasis-open.org; kvm@vger.kernel.org; > > qemu-devel@nongnu.org; quintela@redhat.com; dgilbert@redhat.com; > > Hansen, Dave; Li, Liang Z > > Subject: [PATCH v3 kernel 0/7] Extend virtio-balloon for fast > > (de)inflating & fast live migration > > > > This patch set contains two parts of changes to the virtio-balloon. > > > > One is the change for speeding up the inflating & deflating process, > > the main idea of this optimization is to use bitmap to send the page > > information to host instead of the PFNs, to reduce the overhead of > > virtio data transmission, address translation and madvise(). This can > > help to improve the performance by about 85%. > > > > Another change is for speeding up live migration. By skipping process > > guest's free pages in the first round of data copy, to reduce needless > > data processing, this can help to save quite a lot of CPU cycles and > > network bandwidth. We put guest's free page information in bitmap and > > send it to host with the virt queue of virtio-balloon. For an idle 8GB > > guest, this can help to shorten the total live migration time from > > 2Sec to about 500ms in the 10Gbps network environment. > > > > Dave Hansen suggested a new scheme to encode the data structure, > > because of additional complexity, it's not implemented in v3. > > > > Changes from v2 to v3: > > * Change the name of 'free page' to 'unused page'. > > * Use the scatter & gather bitmap instead of a 1MB page bitmap. > > * Fix overwriting the page bitmap after kicking. > > * Some of MST's comments for v2. > > > > Changes from v1 to v2: > > * Abandon the patch for dropping page cache. > > * Put some structures to uapi head file. > > * Use a new way to determine the page bitmap size. > > * Use a unified way to send the free page information with the bitm= ap > > * Address the issues referred in MST's comments > > > > > > Liang Li (7): > > virtio-balloon: rework deflate to add page to a list > > virtio-balloon: define new feature bit and page bitmap head > > mm: add a function to get the max pfn > > virtio-balloon: speed up inflate/deflate process > > mm: add the related functions to get unused page > > virtio-balloon: define feature bit and head for misc virt queue > > virtio-balloon: tell host vm's unused page info > > > > drivers/virtio/virtio_balloon.c | 390 > > ++++++++++++++++++++++++++++++++---- > > include/linux/mm.h | 3 + > > include/uapi/linux/virtio_balloon.h | 41 ++++ > > mm/page_alloc.c | 94 +++++++++ > > 4 files changed, 485 insertions(+), 43 deletions(-) > > > > -- > > 1.8.3.1 -- 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