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[81.97.203.96]) by smtp.gmail.com with ESMTPSA id q128-20020a1c4386000000b003c71358a42dsm6741380wma.18.2022.11.30.01.20.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Nov 2022 01:20:04 -0800 (PST) Date: Wed, 30 Nov 2022 09:20:02 +0000 From: "Dr. David Alan Gilbert" To: Stefan Hajnoczi Cc: quintela@redhat.com, qemu-devel@nongnu.org Subject: Re: QEMU 7.2 non-deterministic migration-test CI failure Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/2.2.7 (2022-08-07) Received-SPF: pass client-ip=170.10.129.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org * Stefan Hajnoczi (stefanha@redhat.com) wrote: > Hi, > The following cross-i386-tci migration-test failure was triggered by CI: > > >>> MALLOC_PERTURB_=133 G_TEST_DBUS_DAEMON=/builds/qemu-project/qemu/tests/dbus-vmstate-daemon.sh QTEST_QEMU_BINARY=./qemu-system-i386 /builds/qemu-project/qemu/build/tests/qtest/migration-test --tap -k > ――――――――――――――――――――――――――――――――――――― ✀ ――――――――――――――――――――――――――――――――――――― > stderr: > Could not access KVM kernel module: No such file or directory > Could not access KVM kernel module: No such file or directory > Could not access KVM kernel module: No such file or directory > Could not access KVM kernel module: No such file or directory > qemu-system-i386: Unknown savevm section type 126 > ../tests/qtest/libqtest.c:188: kill_qemu() detected QEMU death from signal 11 (Segmentation fault) (core dumped) > TAP parsing error: Too few tests run (expected 14, got 2) > (test program exited with status code -6) > ―――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――― > > https://gitlab.com/qemu-project/qemu/-/jobs/3397205431 > > When I retried the test succeeded. I haven't managed to reproduce it > locally yet either. > > Any ideas? Hmm, that's not good; I've not seen that error before, but: QEMU_VM_SECTION_FOOTER= 0x7e It probably means the destination read the wrong amount on a previous section; probably something conditional on a state which is why it only triggers sometimes. Although, that would normally trigger a 'Missing section footer for ...' rather than end up hitting that error. I can try letting it soak on one of my test machines. Dave > Stefan -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK