Re: guest kernel fails to start when cpuset is used

Reply: Nikos Vassiliadis : "Re: guest kernel fails to start when cpuset is used"
In reply to: Nikos Vassiliadis : "guest kernel fails to start when cpuset is used"
Go to: [ bottom of page ] [ top of archives ] [ this month ]

From: Miroslav Lachman <000.fbsd_at_quip.cz>
Date: Thu, 19 Mar 2026 11:21:10 UTC

On 19/03/2026 11:39, Nikos Vassiliadis wrote:
> Hi,
> 
> I was trying to limit a 12-core VM with cpuset. So I limited it to 0-5
> cores and the kernel seems to fail to start.

[..]

> ACPI APIC Table: <BHYVE  BVAPIC >
> FreeBSD/SMP: Multiprocessor System Detected: 12 CPUs
> FreeBSD/SMP: 12 package(s) x 1 core(s)
> random: unblocking device.
> ioapic0 <Version 1.1> irqs 0-31
> Launching APs: 2 8 6 11 10 9 3 4 7 5 1
> 
> And it stays there spinning.
> 
> Any ideas?

I don't think this is a good idea. Why not use -c a -p options for bhyve?
-c <num_of_cores>
-p vcpu:hostcpu Pin guest's virtual CPU vcpu to hostcpu

Kind regards
Miroslav Lachman