From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rafael Aquini Subject: [PATCH v2 0/4] make balloon pages movable by compaction Date: Thu, 28 Jun 2012 18:49:38 -0300 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: 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 To: linux-mm@kvack.org Cc: Rik van Riel , Rafael Aquini , Konrad Rzeszutek Wilk , "Michael S. Tsirkin" , linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Andi Kleen , Andrew Morton List-Id: virtualization@lists.linuxfoundation.org This patchset follows the main idea discussed at 2012 LSFMMS section: "Ballooning for transparent huge pages" -- http://lwn.net/Articles/490114/ to introduce the required changes to the virtio_balloon driver, as well as changes to the core compaction & migration bits, in order to allow memory balloon pages become movable within a guest. Rafael Aquini (4): mm: introduce compaction and migration for virtio ballooned pages virtio_balloon: handle concurrent accesses to virtio_balloon struct elements virtio_balloon: introduce migration primitives to balloon pages mm: add vm event counters for balloon pages compaction drivers/virtio/virtio_balloon.c | 142 +++++++++++++++++++++++++++++++++++---- include/linux/mm.h | 16 +++++ include/linux/virtio_balloon.h | 6 ++ include/linux/vm_event_item.h | 2 + mm/compaction.c | 111 ++++++++++++++++++++++++------ mm/migrate.c | 32 ++++++++- mm/vmstat.c | 4 ++ 7 files changed, 280 insertions(+), 33 deletions(-) V2: address Mel Gorman's review comments TODO: - check on naming chages suggested by Konrad (original series discussion) Preliminary test results: (2 VCPU 1024mB RAM KVM guest running 3.5.0_rc4+) * 64mB balloon: [root@localhost ~]# awk '/compact/ {print}' /proc/vmstat compact_blocks_moved 0 compact_pages_moved 0 compact_pagemigrate_failed 0 compact_stall 0 compact_fail 0 compact_success 0 compact_balloon_migrated 0 compact_balloon_failed 0 compact_balloon_isolated 0 compact_balloon_freed 0 [root@localhost ~]# [root@localhost ~]# for i in $(seq 1 4); do echo 1> /proc/sys/vm/compact_memory & done &>/dev/null [1] Done echo > /proc/sys/vm/compact_memory [2] Done echo > /proc/sys/vm/compact_memory [3]- Done echo > /proc/sys/vm/compact_memory [4]+ Done echo > /proc/sys/vm/compact_memory [root@localhost ~]# [root@localhost ~]# awk '/compact/ {print}' /proc/vmstat compact_blocks_moved 2717 compact_pages_moved 46697 compact_pagemigrate_failed 75 compact_stall 0 compact_fail 0 compact_success 0 compact_balloon_migrated 16384 compact_balloon_failed 0 compact_balloon_isolated 16384 compact_balloon_freed 16384 * 128mB balloon: [root@localhost ~]# awk '/compact/ {print}' /proc/vmstat compact_blocks_moved 0 compact_pages_moved 0 compact_pagemigrate_failed 0 compact_stall 0 compact_fail 0 compact_success 0 compact_balloon_migrated 0 compact_balloon_failed 0 compact_balloon_isolated 0 compact_balloon_freed 0 [root@localhost ~]# [root@localhost ~]# for i in $(seq 1 4); do echo 1> /proc/sys/vm/compact_memory & done &>/dev/null [1] Done echo > /proc/sys/vm/compact_memory [2] Done echo > /proc/sys/vm/compact_memory [3]- Done echo > /proc/sys/vm/compact_memory [4]+ Done echo > /proc/sys/vm/compact_memory [root@localhost ~]# [root@localhost ~]# awk '/compact/ {print}' /proc/vmstat compact_blocks_moved 2598 compact_pages_moved 47660 compact_pagemigrate_failed 103 compact_stall 0 compact_fail 0 compact_success 0 compact_balloon_migrated 26652 compact_balloon_failed 76 compact_balloon_isolated 26728 compact_balloon_freed 26652 -- 1.7.10.2