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Re: Disable EARLY_PRINTK on IP22 to make the system boot

To: Dmitri Vorobiev <dmitri.vorobiev@gmail.com>
Subject: Re: Disable EARLY_PRINTK on IP22 to make the system boot
From: Martin Michlmayr <tbm@cyrius.com>
Date: Thu, 19 Nov 2009 17:00:51 +0000
Cc: linux-mips@linux-mips.org
In-reply-to: <90edad820911190856m62275563yf610c4a7dcdd1f67@mail.gmail.com>
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References: <20091119164009.GA15038@deprecation.cyrius.com> <90edad820911190856m62275563yf610c4a7dcdd1f67@mail.gmail.com>
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* Dmitri Vorobiev <dmitri.vorobiev@gmail.com> [2009-11-19 18:56]:
> > Some Debian users have reported that the kernel hangs early
> > during boot on some IP22 systems.  Thomas Bogendoerfer found
> > that this is due to a "bad interaction between CONFIG_EARLY_PRINTK
> > and overwritten prom memory during early boot".  Since there's
> > no fix yet, disable CONFIG_EARLY_PRINTK for now.
> 
> Never experienced anything like that, although I'm quite extensively
> using IP22 with recent kernels. Any details on the hangs?

It doesn't happen on all machines.  It has been reported e.g. with an
Indigo2.  See http://bugs.debian.org/507557

Since Thomas Bogendoerfer disagnosed the problem, he should be able to
say more.

-- 
Martin Michlmayr
http://www.cyrius.com/

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