Re: Panic "vm_fault_lookup: fault on nofault entry" amd64 r362008 -> r362045

From: Konstantin Belousov <kostikbel_at_gmail.com>
Date: Thu, 11 Jun 2020 19:31:47 +0300
On Thu, Jun 11, 2020 at 12:24:17PM -0400, Mark Johnston wrote:
> On Thu, Jun 11, 2020 at 09:11:56AM -0700, David Wolfskill wrote:
> > On Thu, Jun 11, 2020 at 06:51:43PM +0300, Konstantin Belousov wrote:
> > > ...
> > > Can you boot into single-user, without loading linux/cuse/nvidia modules.
> > > Even, do not load any module at all, and keeping root ro.
> > > 
> > > If boot succeed, then try to load modules one by one and see which causes
> > > panic.
> > 
> > I commented out each of the "*_load" directives in /boot/loader.conf;
> > rebooted; escaped to loader (from the boot menu); used "lsmod" to verify
> > that nothing was loaded at that time, then issued "boot -s" -- which did
> > succeed.
> > 
> > Unfortunately, I ran out of time to do further experiments for now; I'll
> > need to do some work-related things for a while, but thought that this
> > might at least provide some useful information.
> > 
> > Here is what I commented out:
> > 
> > g1-55(12.1-S)[2] grep KIB boot/loader.conf
> > # KIB coretemp_load="YES"
> > # KIB iwn5000fw_load="YES"
> > # KIB linux_load="YES"
> > # KIB nvidia-modeset_load="YES"
> > # KIB cuse_load="YES"
> > # KIB geom_eli_load="YES"
> > # KIB filemon_load="YES"
> 
> Thanks.  I'm able to reproduce a somewhat similar problem in bhyve: if I
> preload iwn5000fw.ko, a r362045 kernel fails to boot very early with
> 
> ---<<BOOT>>---
> ACPI: Failed to map RSDT
> APIC: Could not find any APICs.
> panic: running without device atpic requires a local APIC
> 
> Reverting r362035 allows the kernel to boot again, but so does adding a
> few printf() calls to the pmap and ACPI code.

I have some private report that this is caused by r362031.
Can you confirm that reverting it helps ?

If yes, please show me the output of sysctl vm.pmap.
Received on Thu Jun 11 2020 - 14:32:00 UTC

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