From patchwork Tue Jul 26 16:10:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Sistare X-Patchwork-Id: 1660881 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=oracle.com header.i=@oracle.com header.a=rsa-sha256 header.s=corp-2022-7-12 header.b=MlaO5XVK; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4LsjMZ4l3Xz9s2R for ; Wed, 27 Jul 2022 02:40:41 +1000 (AEST) Received: from localhost ([::1]:37988 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oGNbp-0004FT-Gh for incoming@patchwork.ozlabs.org; Tue, 26 Jul 2022 12:40:37 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:35466) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oGNAJ-0003si-Hz for qemu-devel@nongnu.org; Tue, 26 Jul 2022 12:12:13 -0400 Received: from mx0b-00069f02.pphosted.com ([205.220.177.32]:62632) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oGNAH-0006IA-Jw for qemu-devel@nongnu.org; Tue, 26 Jul 2022 12:12:11 -0400 Received: from pps.filterd (m0246632.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 26QFn4Re016276; Tue, 26 Jul 2022 16:11:50 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2022-7-12; bh=Q9REqTLqaxzuJbTQr14aek8V7TlG53PHONiCEnJyqgE=; b=MlaO5XVKNWGiGQ7yVHpkViJrv7Hzz0tkZur4lYGFvqS+bufpLICFHX7xbnAnaSFK3qyt wPLpg/KmwL1vOTNnha146y+C+xB6xzwun0j4GHRclnYiDOP4jx8C/tzRvvnrmSv7PG5E 1DZyFOrqcqM+8/ldmq4rV33YsmHGN4P2gUdUXdjpLavfcJptDS22ZTgWvMR2gTE/jT6T +Q0WoPk1E/xtwzL5fJMAvIBGrd0Od3BqFWFZDBNWUxrp7f1I/NY3Hltd28maSLZ660HX p0s00gc/AlbyahCg6uUEYNgI+NI/yJUcZ9XtOwvNkBl5l5lWmuRKOpa5Ea457FQf03+i jw== Received: from phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta03.appoci.oracle.com [138.1.37.129]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3hg9a9f0xj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 26 Jul 2022 16:11:50 +0000 Received: from pps.filterd (phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (8.17.1.5/8.17.1.5) with ESMTP id 26QEbnNk006229; Tue, 26 Jul 2022 16:11:49 GMT Received: from pps.reinject (localhost [127.0.0.1]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 3hh65bq2wx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 26 Jul 2022 16:11:49 +0000 Received: from phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 26QG5uTb023334; Tue, 26 Jul 2022 16:11:48 GMT Received: from ca-dev63.us.oracle.com (ca-dev63.us.oracle.com [10.211.8.221]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTP id 3hh65bq0y5-45; Tue, 26 Jul 2022 16:11:48 +0000 From: Steve Sistare To: qemu-devel@nongnu.org Cc: Paolo Bonzini , Stefan Hajnoczi , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , =?utf-8?q?Alex_Benn=C3=A9e?= , "Dr. David Alan Gilbert" , "Michael S. Tsirkin" , Marcel Apfelbaum , Alex Williamson , "Daniel P. Berrange" , Juan Quintela , Markus Armbruster , Eric Blake , Jason Zeng , Zheng Chuan , Steve Sistare , Mark Kanda , Guoyi Tu , Peter Maydell , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?q?=C3=A9?= , Igor Mammedov , David Hildenbrand , John Snow , Peng Liang Subject: [PATCH V9 44/46] migration: fix suspended runstate Date: Tue, 26 Jul 2022 09:10:41 -0700 Message-Id: <1658851843-236870-45-git-send-email-steven.sistare@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1658851843-236870-1-git-send-email-steven.sistare@oracle.com> References: <1658851843-236870-1-git-send-email-steven.sistare@oracle.com> X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-07-26_04,2022-07-26_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 malwarescore=0 phishscore=0 spamscore=0 mlxlogscore=999 suspectscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2206140000 definitions=main-2207260063 X-Proofpoint-GUID: oLZK3jPSA3hC8PoR32yDqyXY_4gpvKhl X-Proofpoint-ORIG-GUID: oLZK3jPSA3hC8PoR32yDqyXY_4gpvKhl Received-SPF: pass client-ip=205.220.177.32; envelope-from=steven.sistare@oracle.com; helo=mx0b-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Migration of a guest in the suspended state is broken. The incoming migration code automatically tries to wake the guest, which IMO is wrong -- the guest should end migration in the same state it started. Further, the wakeup attempt merely sets state to running but does not actually start the guest, as vm_start was never called during this invocation of qemu. To fix, leave the guest in the suspended state, but call qemu_system_start_on_wakeup_request() so the guest is properly resumed when the client sends a system_wakeup command. Signed-off-by: Steve Sistare --- migration/migration.c | 11 ++++------- softmmu/runstate.c | 1 + 2 files changed, 5 insertions(+), 7 deletions(-) diff --git a/migration/migration.c b/migration/migration.c index e0fc2b8..45eebea 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -568,6 +568,10 @@ static void process_incoming_migration_bh(void *opaque) vm_start(); } else { runstate_set(global_state_get_runstate()); + if (runstate_check(RUN_STATE_SUSPENDED)) { + /* Force vm_start to be called later. */ + qemu_system_start_on_wakeup_request(); + } } /* * This must happen after any state changes since as soon as an external @@ -3273,7 +3277,6 @@ static int postcopy_start(MigrationState *ms) qemu_mutex_lock_iothread(); trace_postcopy_start_set_run(); - qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); global_state_store(); ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); if (ret < 0) { @@ -3484,7 +3487,6 @@ static void migration_completion(MigrationState *s) if (s->state == MIGRATION_STATUS_ACTIVE) { qemu_mutex_lock_iothread(); s->downtime_start = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); - qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); s->vm_was_running = runstate_is_running(); ret = global_state_store(); @@ -4285,11 +4287,6 @@ static void *bg_migration_thread(void *opaque) qemu_mutex_lock_iothread(); - /* - * If VM is currently in suspended state, then, to make a valid runstate - * transition in vm_stop_force_state() we need to wakeup it up. - */ - qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); s->vm_was_running = runstate_is_running(); if (global_state_store()) { diff --git a/softmmu/runstate.c b/softmmu/runstate.c index c7db5ac..6ba0a4e 100644 --- a/softmmu/runstate.c +++ b/softmmu/runstate.c @@ -154,6 +154,7 @@ static const RunStateTransition runstate_transitions_def[] = { { RUN_STATE_RUNNING, RUN_STATE_SUSPENDED }, { RUN_STATE_SUSPENDED, RUN_STATE_RUNNING }, { RUN_STATE_SUSPENDED, RUN_STATE_FINISH_MIGRATE }, + { RUN_STATE_SUSPENDED, RUN_STATE_PAUSED }, { RUN_STATE_SUSPENDED, RUN_STATE_PRELAUNCH }, { RUN_STATE_SUSPENDED, RUN_STATE_COLO},