Re: EARLY_AP_STARTUP hangs during boot

On Mon, 16 May 2016 10:54:19 -0700
John Baldwin <jhb_at_freebsd.org> wrote:

> On Monday, May 16, 2016 12:22:42 PM Gary Jennejohn wrote:
> > I tried out EARLY_AP_STARTUP, but the kernel hangs and I can't
> > break into DDB.
> > 
> > I did a verbose boot and the last lines I see are related to routing
> > MSI-X to various local APIC vectors.  I copied the last few lines and
> > they look like this:
> > 
> > msi: routing MSI-X IRQ 256 to local APIC 2 vector 48
> > msi: routing MSI-X IRQ 257 to local APIC 3 vector 48
> > msi: routing MSI-X IRQ 258 to local APIC 4 vector 48
> > msi: routing MSI-X IRQ 256 to local APIC 0 vector 49
         ^^^^^^^ Assigning
> > 
> > I tried disabling msi and msix in /boot/loader.conf, but the settings
> > were ignored (probabaly too early).  
> 
> No, those settings are not too early.  However, the routing to different
> CPUs now happens earlier than it used to.  What is the line before the
> MSI lines?  You can take a picture with your phone/camera if that's simplest.
> 

Here a few lines before the MSI routing happens:

hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff irq 0,8 on acpi0
hpet0: vendor 0x4353, rev 0x1, 14318180 Hz, 3 timers, legacy route
hpet0: t0 : irqs 0x00c0ff (0), MSI, periodic
hpet0: t1 : irqs 0x00c0ff (0), MSI, periodic
hpet0: t2 : irqs 0x00c0ff (0), MSI, periodic
Timecounter "HPET" frequency 14318180 Hz quality 950

-- 
Gary Jennejohn