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Date: Sat, 16 Jul 2011 00:17:21 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Mandeep Singh Baines <msb@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
        Huang Ying <ying.huang@intel.com>, Andi Kleen <ak@linux.intel.com>,
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        Jesse Barnes <jbarnes@virtuousgeek.org>,
        Dave Airlie <airlied@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] panic, vt: do not force oops output when panic_timeout
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On Fri, 15 Jul 2011 14:39:27 -0700
Mandeep Singh Baines <msb@chromium.org> wrote:

> Alan Cox (alan@lxorguk.ukuu.org.uk) wrote:
> > > a serial port. When I disabled the serial out, my machine started to
> > > get wedged on a panic. I guess screen_unblank was in bust_spinlocks
> > > for a reason. It probably bust some spin_locks somewhere.
> > 
> > No something else is wrong here. The console panic should be reliably
> > breaking the locks but a quick test of taking the console lock and BUG()
> > on a current kernel shows something has broken this.
> > 
> 
> Root caused to the issue I reported earlier with unblank_screen:
> 
> http://lkml.org/lkml/2011/6/20/394

Thanks - I missed that at the time and I'll take a look at it.