Re: boot with floppy enabled doesn't.....

On Tuesday, May 03, 2016 10:20:21 PM Joel Dahl wrote:
> On Tue, May 03, 2016 at 12:58:15PM -0700, John Baldwin wrote:
> > On Tuesday, May 03, 2016 03:37:27 PM Michael Butler wrote:
> > > On 05/03/16 11:21, Larry Rosenman wrote:
> > > > On 2016-05-03 05:49, Joel Dahl wrote:
> > > >> On Sat, Apr 30, 2016 at 10:36:53PM -0500, Larry Rosenman wrote:
> > > >>> On a current -CURRENT if my Floppy disk controller and device are
> > > >>> ENABLED, we do NOT pass mount root, and the floppy disk
> > > >>> light is ON.
> > > >>
> > > >> Just a "me too". But this is with VMware Fusion. If I disable the
> > > >> floppy from
> > > >> BIOS, the virtual machine boots. If I leave it enabled, it hangs.
> > > > Thanks for posting that I'm not the only one, and it's not flakey hardware.
> > > > 
> > > 
> > > I have an, otherwise extremely reliable but ancient, Intel TR440BXA
> > > motherboard doing this :-(
> > > 
> > > What drove me mad for a while is that I have an identical machine, with
> > > exception of 10k RPM SCSI disks, which doesn't hang. I simply optioned
> > > out "device fdc" and it's behaved ever since,
> > 
> > Larry wasn't able to get into DDB when his box hung, are either of you able
> > to get into DDB when it hangs?
> 
> Um, ctrl-alt-backspace doesn't work for me, but ctrl-alt-esc does.
> 
> I uploaded a few screenshots here: https://www.vnode.se/files/freebsd/

Thanks.  It seems like the fdc worker thread isn't there and GEOM is stuck
waiting for that thread to do something (well waiting for the commands
that thread handles to be executed).

First step would be just add a 'panic' to fdc_start_worker() in fdc.c at
the end to make sure it is getting called.  (And when it drops you into ddb
you should be able to see the fdc0 kproc in 'ps' output).

-- 
John Baldwin