PXE boot using Grub bootloader fails at mountroot; no PXE devs.

[John-Mark Gurney]

Rick Macklem wrote this message on Wed, Jul 02, 2014 at 06:44 -0400:
> Beeblebrox wrote:
> > Hi Rick,
> > 
> > > Btw, there is BOOTP_DEBUG stuff in bootp_subr.c. If your debug
> > > kernel
> > > didn't include that option, trying it might tell you where it
> > > breaks?
> > 
> > I got around to trying the BOOTP_DEBUG knob, it breaks the kernel
> > build
> > right from start. bootp_subr.c does have that code, but the
> > buildkernel
> > does not like it. I got:
> > unknown option "BOOTP_DEBUG" \ *** Error code 1 \ Stop.
> > 
> As the other post noted, you can try adding the option.
> Or, you can just add a line like:
> #define BOOTP_DEBUG 1
> at the beginning of bootp_subr.c.
> 
> I haven't tried it, so there might be other build issues.

I was going to suggest that, but decided against it so that we might
fix it for others to use...

> > Kernel Config has these debug options turned on:
> > options 	KDB
> > options 	DDB
> > options 	GDB
> > options     INVARIANTS
> > options     INVARIANT_SUPPORT
> > options     WITNESS
> > options     DEBUG_LOCKS
> > options     DEBUG_VFS_LOCKS
> > options     DIAGNOSTIC
> > options     BOOTP_DEBUG

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."