Date: Tue, 05 Apr 2022 19:56:48 +0000 From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 263072] System freezes during reboot when vmm module is loaded inside a QEMU/KVM virtual machine Message-ID: <bug-263072-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D263072 Bug ID: 263072 Summary: System freezes during reboot when vmm module is loaded inside a QEMU/KVM virtual machine Product: Base System Version: 13.1-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Many People Priority: --- Component: bhyve Assignee: virtualization@FreeBSD.org Reporter: dasebek@gmail.com FreeBSD system running inside a QEMU/KVM virtual machine freezes during a reboot when the vmm kernel module is loaded. - How reproducible: Always - How to reproduce: 1. Install FreeBSD 13.0-RELEASE or 13.1-RC1 2. run the following commands as root: # kldload vmm # reboot - Expected behavior: The system reboots. - Observed behavior: The reboot proceeds as usual up until the point when the "Rebooting..." mes= sage is displayed and the machine should restart. But instead of restarting, the screen goes blank, but the CPU usage remains high, and the virtual machine hangs until I do a hard power-off of the virtual machine. - Affected versions: Guest OS: The problem occurred on all FreeBSD versions that I tested. Namely, FreeBSD 13.1 built from releng/13.1 on April 4, 2022 FreeBSD 13.0-RELEASE FreeBSD 13.0-STABLE built in October 2021 Hypervisor: I used QEMU version 6.2.0 (qemu-6.2.0-5.fc36) together with virt-manager version 4.0.0. It doesn't matter whether I choose the Q35 or i440FX chipset= or BIOS or UEFI boot in the VM settings. The problem is also present when running FreeBSD in a DigitalOcean droplet. I don't know how loading the vmm module affects the system reboot. It could also be an issue with the QEMU/KVM hypervisor itself. But without the vmm module loaded, the machine reboots correctly every time. --=20 You are receiving this mail because: You are the assignee for the bug.=
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