Date: Tue, 16 Dec 2025 17:44:18 +0100 From: Evilham <contact@evilham.com> To: Robert Ricci <ricci@cs.utah.edu> Cc: freebsd-virtualization@freebsd.org, virtualization@freebsd.org Subject: Re: Possible vmm/bhyve regression on FreeBSD 15 Message-ID: <a0d0eac391a6ba5f6b6b8f071f05d683122d@yggdrasil.evilham.com> In-Reply-To: <hasds5hof62ihqe2kzagcp652vmbvruabtf545sf77o574i6hq@porievfr5l2s> References: <hasds5hof62ihqe2kzagcp652vmbvruabtf545sf77o574i6hq@porievfr5l2s>
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Hey, On dg., des. 14 2025, Robert Ricci wrote: > I've run into what appears to be a regression in vmm/bhyve in > FreeBSD 15, and could use some help tracking it down. > > I upgraded my AMD Zen 4 machine (via source) from stable/14 > (sometime post-14.3) to stable/15 (currently running -stable > from today). I had some VMs (Linux guests of various flavors) > that were running fine before the update. After the update, they > won't start. > > The behavior is: the bootloader seems to work fine (eg. I can > run grub-bhyve, it runs to completion and exits). However once I > start bhyve itself, it just burns up a CPU (note: just one, no > matter how many vCPUs) - I get nothing on serial console, > nothing on the fbuf if I enable it. I think I'm seeing this as well, did you manage to solve it? For me it doesn't matter whether I use uefi or grub bootlaoders. Here is my (suboptimal) temporary workaround: - start a tmux - run vm start -f VM-name on each tmux tab (somehow this works) I also tried with vm-bhyve-devel-1.7.0_1 and have the same symptoms you mentioned. Cheers, -- Evilhamhelp
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