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Re: SB1250 locking up in init on current 2.6.16 kernel

To: Larry Stefani <lstefani@yahoo.com>
Subject: Re: SB1250 locking up in init on current 2.6.16 kernel
From: Ralf Baechle <ralf@linux-mips.org>
Date: Mon, 24 Mar 2008 20:33:11 +0000
Cc: linux-mips@linux-mips.org
In-reply-to: <15031.81072.qm@web38802.mail.mud.yahoo.com>
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On Mon, Mar 24, 2008 at 07:00:15AM -0700, Larry Stefani wrote:

> I've been trying to upgrade from 2.6.16.18 to
> 2.6.16.60, but am seeing a hard lockup right before
> "INIT: version 2.78 booting" on my SB1250-based board.
> 
> I found a related discussion on the Debian mailing
> list:
> 
> http://groups.google.com/group/linux.debian.bugs.dist/browse_thread/thread/b7159ee25106c7f9
> 
> However, after applying Thiemo's patch to mark pages
> tainted by PIO IDE as dirty, the lockup still occurs.

It's a bug which should be fixed but nevertheless I can highly recommend
something like a SiliconImage SATA controller - the onboard PIO PATA
controller is so slow.

> I narrowed the file changes to
> 
>      arch/mips/mm/c-sb1.c
>      arch/mips/mm/cache.c
>      arch/mips/mm/init.c
>      include/asm-mips/cache-flush.h
>      include/asm-mips/page.h
> 
> between 2.6.16.27 and 2.6.16.29.  There was no
> 2.6.16.28 tarball posted on linux-mips.org, so I
> basically brought .27 to .29 until I found the
> offending files.

I've pushed the tag again so now there is a tarball.

If you need to track something like this you're probably best with
git bisect which should bring you right to the offending commit.

> Is anyone running a 2.6.16 kernel (after 2.6.16.27) on
> a SB1250-based board?

Later kernels do run on bcm1480 which is close enough.

  Ralf

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