From patchwork Wed Aug 3 12:25:57 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhanghailiang X-Patchwork-Id: 9261155 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 7BEE66048B for ; Wed, 3 Aug 2016 12:33:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6A6242855E for ; Wed, 3 Aug 2016 12:33:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5A6C328580; Wed, 3 Aug 2016 12:33:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C8EBD2855E for ; Wed, 3 Aug 2016 12:33:40 +0000 (UTC) Received: from localhost ([::1]:34205 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bUvMh-0000Sm-R1 for patchwork-qemu-devel@patchwork.kernel.org; Wed, 03 Aug 2016 08:33:39 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60668) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bUvGG-0000cK-0C for qemu-devel@nongnu.org; Wed, 03 Aug 2016 08:27:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bUvGE-0006YW-RO for qemu-devel@nongnu.org; Wed, 03 Aug 2016 08:26:59 -0400 Received: from szxga01-in.huawei.com ([58.251.152.64]:30496) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bUvGD-0006WY-Vw for qemu-devel@nongnu.org; Wed, 03 Aug 2016 08:26:58 -0400 Received: from 172.24.1.36 (EHLO szxeml428-hub.china.huawei.com) ([172.24.1.36]) by szxrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id DOT30312; Wed, 03 Aug 2016 20:26:43 +0800 (CST) Received: from localhost (10.177.24.212) by szxeml428-hub.china.huawei.com (10.82.67.183) with Microsoft SMTP Server id 14.3.235.1; Wed, 3 Aug 2016 20:26:37 +0800 From: zhanghailiang To: Date: Wed, 3 Aug 2016 20:25:57 +0800 Message-ID: <1470227172-13704-20-git-send-email-zhang.zhanghailiang@huawei.com> X-Mailer: git-send-email 2.7.2.windows.1 In-Reply-To: <1470227172-13704-1-git-send-email-zhang.zhanghailiang@huawei.com> References: <1470227172-13704-1-git-send-email-zhang.zhanghailiang@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.177.24.212] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020203.57A1E305.0152, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: d25b6527b70c95aa4d08fd4c811dd61c X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4.x-2.6.x [generic] X-Received-From: 58.251.152.64 Subject: [Qemu-devel] [PATCH COLO-Frame v18 19/34] COLO: Implement failover work for Secondary VM X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: xiecl.fnst@cn.fujitsu.com, lizhijian@cn.fujitsu.com, quintela@redhat.com, eddie.dong@intel.com, peter.huangpeng@huawei.com, dgilbert@redhat.com, amit.shah@redhat.com, zhangchen.fnst@cn.fujitsu.com, zhanghailiang Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP If users require SVM to takeover work, colo incoming thread should exit from loop while failover BH helps backing to migration incoming coroutine. Signed-off-by: zhanghailiang Signed-off-by: Li Zhijian Reviewed-by: Dr. David Alan Gilbert --- v12: - Improve error message that suggested by Dave - Add Reviewed-by tag --- migration/colo.c | 42 +++++++++++++++++++++++++++++++++++++++--- 1 file changed, 39 insertions(+), 3 deletions(-) diff --git a/migration/colo.c b/migration/colo.c index a4fe334..eeef775 100644 --- a/migration/colo.c +++ b/migration/colo.c @@ -46,6 +46,33 @@ static bool colo_runstate_is_stopped(void) return runstate_check(RUN_STATE_COLO) || !runstate_is_running(); } +static void secondary_vm_do_failover(void) +{ + int old_state; + MigrationIncomingState *mis = migration_incoming_get_current(); + + migrate_set_state(&mis->state, MIGRATION_STATUS_COLO, + MIGRATION_STATUS_COMPLETED); + + if (!autostart) { + error_report("\"-S\" qemu option will be ignored in secondary side"); + /* recover runstate to normal migration finish state */ + autostart = true; + } + + old_state = failover_set_state(FAILOVER_STATUS_HANDLING, + FAILOVER_STATUS_COMPLETED); + if (old_state != FAILOVER_STATUS_HANDLING) { + error_report("Incorrect state (%d) while doing failover for " + "secondary VM", old_state); + return; + } + /* For Secondary VM, jump to incoming co */ + if (mis->migration_incoming_co) { + qemu_coroutine_enter(mis->migration_incoming_co); + } +} + static void primary_vm_do_failover(void) { MigrationState *s = migrate_get_current(); @@ -72,6 +99,8 @@ void colo_do_failover(MigrationState *s) if (get_colo_mode() == COLO_MODE_PRIMARY) { primary_vm_do_failover(); + } else { + secondary_vm_do_failover(); } } @@ -421,6 +450,11 @@ void *colo_process_incoming_thread(void *opaque) goto out; } assert(request); + if (failover_request_is_active()) { + error_report("failover request"); + goto out; + } + /* FIXME: This is unnecessary for periodic checkpoint mode */ colo_send_message(mis->to_src_file, COLO_MESSAGE_CHECKPOINT_REPLY, &local_err); @@ -490,10 +524,12 @@ out: if (fb) { qemu_fclose(fb); } - - qemu_mutex_lock_iothread(); + /* + * We can ensure BH is hold the global lock, and will join COLO + * incoming thread, so here it is not necessary to lock here again, + * Or there will be a deadlock error. + */ colo_release_ram_cache(); - qemu_mutex_unlock_iothread(); if (mis->to_src_file) { qemu_fclose(mis->to_src_file);