linux-kernel - Re: PROBLEM: memory corrupting bug, bisected to 6dda9d55

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Date:	Wed, 20 Oct 2010 21:32:16 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	pacman@...h.dhis.org
Cc:	Segher Boessenkool <segher@...nel.crashing.org>,
	Mel Gorman <mel@....ul.ie>, linux-mm@...ck.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: PROBLEM: memory corrupting bug, bisected to 6dda9d55

On Tue, 2010-10-19 at 22:23 -0500, pacman@...h.dhis.org wrote:
> The diff fragment above applied inside prom_close_stdin, but there are
> some
> prom_printf calls after prom_close_stdin. Calling prom_printf after
> closing
> stdout sounds like it could be bad. If I moved it down below all the
> prom_printf's, it would be after the "quiesce" call. Would that be
> acceptable
> (or even interesting as an experiment)? Does a close need a quiesce
> after it?

Just try :-) "quiesce" is something that afaik only apple ever
implemented anyways. It uses hooks inside their OF to shut down all
drivers that do bus master (among other HW sanitization tasks).

Cheers,
Ben.


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