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Mon, 28 Oct 2019 23:50:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1572306625; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=HOgyww85CaZTd33qjudOfCpcXibyYIgkL0SAsN2TQtI=; b=deICxhNrxb9hiU5MmH6wPIMlIm5N7acyYe+aiZecs1wKMGBYbrRiG2hs/CMOMj5u9JuauF wOztrxDBWNqyFksZ29ttmzb8Qz+pRPpP7cnljQDjTwHpuAP3KwiCRNJKWNHLPilUGYdnIs frCjX8Nx3dqBLEjfQmEWZIN6Pd5/kJE= From: Cleber Rosa To: Peter Maydell , qemu-devel@nongnu.org, Eduardo Habkost Subject: [PULL 3/16] Python libs: close console sockets before shutting down the VMs Date: Mon, 28 Oct 2019 19:49:49 -0400 Message-Id: <20191028235002.17691-4-crosa@redhat.com> In-Reply-To: <20191028235002.17691-1-crosa@redhat.com> References: <20191028235002.17691-1-crosa@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-MC-Unique: 1ta5b690MvGw4gmZGWRACg-1 X-Mimecast-Spam-Score: 0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 205.139.110.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fam Zheng , Aleksandar Rikalo , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Fabien Chouteau , KONRAD Frederic , =?UTF-8?q?Herv=C3=A9=20Poussineau?= , Wainer dos Santos Moschetta , Willian Rampazzo , Cleber Rosa , qemu-ppc@nongnu.org, Aleksandar Rikalo , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Aurelien Jarno Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Currently, the console socket on QEMUMachine is closed after the QMP command to gracefully exit QEMU is executed. Because of a possible deadlock (QEMU waiting for the socket to become writable) let's close the console socket earlier. Reference: <20190607034214.GB22416@habkost.net> Reference: https://bugs.launchpad.net/qemu/+bug/1829779 From: Eduardo Habkost Signed-off-by: Cleber Rosa Message-Id: <20190911023558.4880-2-crosa@redhat.com> --- python/qemu/machine.py | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/python/qemu/machine.py b/python/qemu/machine.py index 2024e8b1b1..a4631d6934 100644 --- a/python/qemu/machine.py +++ b/python/qemu/machine.py @@ -277,10 +277,6 @@ class QEMUMachine(object): =20 self._qemu_log_path =3D None =20 - if self._console_socket is not None: - self._console_socket.close() - self._console_socket =3D None - if self._temp_dir is not None: shutil.rmtree(self._temp_dir) self._temp_dir =3D None @@ -342,6 +338,13 @@ class QEMUMachine(object): """ Terminate the VM and clean up """ + # If we keep the console socket open, we may deadlock waiting + # for QEMU to exit, while QEMU is waiting for the socket to + # become writeable. + if self._console_socket is not None: + self._console_socket.close() + self._console_socket =3D None + if self.is_running(): try: if not has_quit: --=20 2.21.0