Re: trouble running FreeBSD with Xen-4.13 (including weird performance issues)

[Brian Buhrow <buhrow%nfbcal.org@localhost>]

	hello.  For what it's worth, I'm running freeBSD-12.2 as a domu on a system with
Xen-4.14.1, using FreeBSD-12.2 as the dom0.  this is in pvh mode for both host and guest.  I'm
not seeing any issues with speed or reliability.  For Xen, I have all the CPU mitigations
turned off, since I'm not worried about miscrient users.  With them enabled, I  saw performance
issues.  My xen dom0 command line looks like:

xen_cmdline="dom0_mem=8192m dom0_max_vcpus=2 dom0=pvh pv-l1tf=off,domu=off console=com1,vga com1=9600,8n1"

I realize you're running NetBSD as dom0, but perhaps this command line will help.
Also, I'm runing NetBSD-5.2, NetBSD-9 and NetBSD-current as domu's on this system as well, all
AMD64.  NetBSD-5.2/i386 (32-bit) doesn't seem to work in this environment.  I've not yet
investigated NetBSD-9/i386 as yet.
-thanks
-Brian