r247095 Boot Failure

[John-Mark Gurney]

Shawn Webb wrote this message on Thu, Feb 21, 2013 at 10:28 -0500:
> I'm on r247095. My box is failing to boot on a Dell Precision T7500. I'm
> running ZFS as root with a mirrored root pool.
> 
> Here's a pic of the box failing:
> https://lh5.googleusercontent.com/-Lq_jlX8of0o/USY4cqZ5BOI/AAAAAAAAGoI/Nd1LGPbFjHc/s1112/IMG_20130221_100723.jpg
> 
> There isn't much useful information in the pic. No crash dump is generated.
> Where do I go from here?
> 
> I can boot into kernel.old and that works as a workaround for now.

Some how, my changes to gcc in r247012 is causing this, even when using
the default of clang as cc...  I was able to reproduce a crash myself,
and then I just backed my change and the new kernel booted...

I'm about to do a binary diff between the broken kernel and the new
kernel (since I only installed the kernel, not userland) and figure
out which part of the system..  But clearly, we are still using gcc
somehow in our kernel builds...

If I don't figure out what it is in a few hours, I'll back out the
change...

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

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