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a="235532265" X-IronPort-AV: E=Sophos;i="5.90,167,1643702400"; d="scan'208";a="235532265" X-IronPort-AV: E=Sophos;i="5.90,167,1643702400"; d="scan'208";a="554030828" From: Zhang Chen To: Jason Wang , Li Zhijian Subject: [PATCH 1/4] softmmu/runstate.c: add RunStateTransition support form COLO to PRELAUNCH Date: Wed, 9 Mar 2022 16:38:55 +0800 Message-Id: <20220309083858.58117-2-chen.zhang@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220309083858.58117-1-chen.zhang@intel.com> References: <20220309083858.58117-1-chen.zhang@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=192.55.52.151; envelope-from=chen.zhang@intel.com; helo=mga17.intel.com X-Spam_score_int: -44 X-Spam_score: -4.5 X-Spam_bar: ---- X-Spam_report: (-4.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, 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: , Cc: Zhang Chen , qemu-dev , Like Xu Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1646816177635100001 Content-Type: text/plain; charset="utf-8" If the checkpoint occurs when the guest finishes restarting but has not started running, the runstate_set() may reject the transition from COLO to PRELAUNCH with the crash log: {"timestamp": {"seconds": 1593484591, "microseconds": 26605},\ "event": "RESET", "data": {"guest": true, "reason": "guest-reset"}} qemu-system-x86_64: invalid runstate transition: 'colo' -> 'prelaunch' Long-term testing says that it's pretty safe. Signed-off-by: Like Xu Signed-off-by: Zhang Chen --- softmmu/runstate.c | 1 + 1 file changed, 1 insertion(+) diff --git a/softmmu/runstate.c b/softmmu/runstate.c index e0d869b21a..c021c56338 100644 --- a/softmmu/runstate.c +++ b/softmmu/runstate.c @@ -127,6 +127,7 @@ static const RunStateTransition runstate_transitions_de= f[] =3D { { RUN_STATE_RESTORE_VM, RUN_STATE_PRELAUNCH }, =20 { RUN_STATE_COLO, RUN_STATE_RUNNING }, + { RUN_STATE_COLO, RUN_STATE_PRELAUNCH }, { RUN_STATE_COLO, RUN_STATE_SHUTDOWN}, =20 { RUN_STATE_RUNNING, RUN_STATE_DEBUG }, --=20 2.25.1