[Bug 261803] System hang under load (possibly only when running bhyve)

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 08 Feb 2022 20:58:06 UTC

            Bug ID: 261803
           Summary: System hang under load (possibly only when running
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Keywords: bhyve
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: mmatalka@gmail.com

Unfortunately I don't have a lot of details because the system completely hangs
in this case and I'm forced to hard reboot.

What I've noticed is that when I'm doing something heavy in I/O and CPU, in my
case this has always been while doing a big compilation, and running bhyve, the
system will randomly completely lock up.

The build I'm running:

FreeBSD bsdell 14.0-CURRENT FreeBSD 14.0-CURRENT #57 main-n253016-a3d71fffa786:
Tue Feb  8 17:10:15 CET 2022    
root@bsdell:/usr/obj/usr/src/amd64.amd64/sys/GENERIC  amd64

I'm on a Dell XPS running drm-devel-kmod

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