From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52301) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YvLcf-0002BA-Oq for qemu-devel@nongnu.org; Thu, 21 May 2015 04:14:35 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YvLcd-0002hE-L9 for qemu-devel@nongnu.org; Thu, 21 May 2015 04:14:33 -0400 Received: from szxga02-in.huawei.com ([119.145.14.65]:10916) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YvLcc-0002gA-Hy for qemu-devel@nongnu.org; Thu, 21 May 2015 04:14:31 -0400 From: zhanghailiang Date: Thu, 21 May 2015 16:13:04 +0800 Message-ID: <1432196001-10352-13-git-send-email-zhang.zhanghailiang@huawei.com> In-Reply-To: <1432196001-10352-1-git-send-email-zhang.zhanghailiang@huawei.com> References: <1432196001-10352-1-git-send-email-zhang.zhanghailiang@huawei.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH COLO-Frame v5 12/29] arch_init: Start to trace dirty pages of SVM List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: lizhijian@cn.fujitsu.com, quintela@redhat.com, yunhong.jiang@intel.com, eddie.dong@intel.com, peter.huangpeng@huawei.com, dgilbert@redhat.com, zhanghailiang , arei.gonglei@huawei.com, amit.shah@redhat.com, david@gibson.dropbear.id.au we will use this dirty bitmap together with VM's cache RAM dirty bitmap to decide which page in cache should be flushed into VM's RAM. Signed-off-by: zhanghailiang --- arch_init.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch_init.c b/arch_init.c index 9adf007..693d00e 100644 --- a/arch_init.c +++ b/arch_init.c @@ -1750,6 +1750,7 @@ static int ram_load(QEMUFile *f, void *opaque, int version_id) int create_and_init_ram_cache(void) { RAMBlock *block; + int64_t ram_cache_pages = last_ram_offset() >> TARGET_PAGE_BITS; rcu_read_lock(); QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { @@ -1761,6 +1762,15 @@ int create_and_init_ram_cache(void) } rcu_read_unlock(); ram_cache_enable = true; + /* + * Start dirty log for slave VM, we will use this dirty bitmap together with + * VM's cache RAM dirty bitmap to decide which page in cache should be + * flushed into VM's RAM. + */ + migration_bitmap = bitmap_new(ram_cache_pages); + migration_dirty_pages = 0; + memory_global_dirty_log_start(); + return 0; out_locked: @@ -1781,6 +1791,12 @@ void release_ram_cache(void) ram_cache_enable = false; + if (migration_bitmap) { + memory_global_dirty_log_stop(); + g_free(migration_bitmap); + migration_bitmap = NULL; + } + rcu_read_lock(); QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { if (block->host_cache) { -- 1.7.12.4