Package: qemu-kvm Version: 1:4.2-7 Severity: important Dear Maintainer,
During a QEMU KVM live migration the sending process crashes if the VM is currently in a booting state (and possibly also during a 'soft' reboot from inside the VM). This has been fixed upstream: https://github.com/qemu/qemu/commit/9b3a31c745b61758aaa5466a3a9fc0526d409188 There are also bug reports available for this problem: https://bugzilla.redhat.com/show_bug.cgi?id=1771032 https://bugzilla.redhat.com/show_bug.cgi?id=1772774 I stumbled over this problem while testing latest builds of Ganeti (https://github.com/ganeti/ganeti) on Debian Bullseye and Ubuntu Focal Fossa which both ship qemu 4.2. The Ganeti QA suite runs a series of tests against a cluster and issues a VM failover (QEMU shutdown on Node A and start on Node B) directly followed by a live migration (QEMU live migration from Node B to Node A). The sending QEMU process dies with this error message: qemu-system-x86_64: /build/qemu-oknQD6/qemu-4.2/accel/kvm/kvm-all.c:653: kvm_log_clear_one_slot: Assertion `mem->dirty_bmap' failed. If you add 'sleep 2' between the reboot and the live migration instructions everything works fine, because the QEMU VM has left the booting state by the time the live migration starts. From a Ganeti point of view, this only happens when using the "sharedfile" storage backend. When you use e.g. DRBD, the Ganeti commands take a bit longer to finish which gives the VM enough time to boot up. For further reference, the same issue has been opened (and fixed) for the respective Ubuntu package: https://bugs.launchpad.net/qemu-kvm/+bug/1872107 -- System Information: Debian Release: bullseye/sid APT prefers testing APT policy: (500, 'testing') Architecture: amd64 (x86_64) Kernel: Linux 5.5.0-2-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=C.UTF-8 (charmap=locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory UTF-8), LANGUAGE=en_US.UTF-8 (charmap=locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory UTF-8) Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages qemu-kvm depends on: ii qemu-system-x86 1:4.2-7 qemu-kvm recommends no packages. qemu-kvm suggests no packages. -- debconf information excluded
