linux-kernel - Re: 2.6.23-rc7-mm1 -- powerpc rtas panic

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Message-Id: <1191371416.8073.1.camel@concordia>
Date:	Wed, 03 Oct 2007 10:30:16 +1000
From:	Michael Ellerman <michael@...erman.id.au>
To:	Tony Breeds <tony@...eyournoodle.com>
Cc:	Linas Vepstas <linas@...tin.ibm.com>, linuxppc-dev@...abs.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: 2.6.23-rc7-mm1 -- powerpc rtas panic

On Wed, 2007-10-03 at 10:26 +1000, Tony Breeds wrote:
> On Tue, Oct 02, 2007 at 06:28:19PM -0500, Linas Vepstas wrote:
> > On Mon, Sep 24, 2007 at 01:35:31PM +0100, Andy Whitcroft wrote:
> > > Seeing the following from an older power LPAR, pretty sure we had
> > > this in the previous -mm also:
> > 
> > I haven't forgetten about this ... and am looking at it now.
> > Seems that whenever I go to reserve the machine pSeries-102,
> > someone else is using it :-)
> 
> This panic is caused by "[POWERPC] pseries: Fix jumbled no_logging flag."
> (79c0108d1b9db4864ab77b2a95dfa04f2dcf264c), in the powerpc/for-2.6.24
> branch.  It looks to me that we have logging enabled too early now.
> 
> I think the following is a reasonable fix?
> 
> ---
> Explicitly enable RTAS error logging, when it should be ready.
> 
> 
> Signed-off-by: Tony Breeds <tony@...eyournoodle.com>
> 
> ---
> 
>  arch/powerpc/platforms/pseries/rtasd.c |    7 ++++++-
>  1 files changed, 6 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/powerpc/platforms/pseries/rtasd.c b/arch/powerpc/platforms/pseries/rtasd.c
> index 30925d2..0df5d0d 100644
> --- a/arch/powerpc/platforms/pseries/rtasd.c
> +++ b/arch/powerpc/platforms/pseries/rtasd.c
> @@ -54,7 +54,10 @@ static unsigned int rtas_event_scan_rate;
>  static int full_rtas_msgs = 0;
>  
>  /* Stop logging to nvram after first fatal error */
> -static int no_more_logging;
> +static int no_more_logging = 1; /* Until we initialize everything,
> +                                 * make sure we don't try logging
> +                                 * anything */
> +

I realise it'll make the patch bigger, but this doesn't seem like a
particularly good name for the variable anymore.

cheers

-- 
Michael Ellerman
OzLabs, IBM Australia Development Lab

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person

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