i/o is very slow on FreeBSD dom0 with Xen-4.12 and Freebsd-12

[Brian Buhrow]

	hello Roger.  Sorry, my bad.  I didn't even look at the cause of the
panic.   Rebooting the system caused it to come up clean after another pass
with fsck.  With the ioapic_ack=old argument, the system comes up right
away and is quite responsive.
	Can you explain how to select which argument to use on the command
line if the autoselection code doesn't work?

	Thank you for your help!

-Brian

On Oct 15, 10:26am, Roger Pau =?iso-8859-1?Q?Monn=E9?= wrote:
} Subject: Re: i/o is very slow on FreeBSD dom0 with Xen-4.12 and Freebsd-12
} On Mon, Oct 14, 2019 at 02:45:04PM -0700, Brian Buhrow wrote:
} > 	hello.  Using: ioapic_ack=old causes the dom0 to crash.  Below are the
} > logs.
} 
} Does the crash happen every time you boot with ioapic_ack=old?
} 
} [...]
} > dev = gpt/gptroot, block = 1, fs = /
} > panic: ffs_blkfree_cg: freeing free block
} > cpuid = 2
} > time = 1571088217
} > KDB: stack backtrace: