linux-kernel - Re: [BUG 2.6.30+] e100 sometimes causes oops during resume

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Message-ID: <20090930153730.GA2120@bizet.domek.prywatny>
Date:	Wed, 30 Sep 2009 17:37:30 +0200
From:	Karol Lewandowski <karol.k.lewandowski@...il.com>
To:	Mel Gorman <mel@....ul.ie>
Cc:	Karol Lewandowski <karol.k.lewandowski@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, david.graham@...el.com,
	"e1000-devel@...ts.sourceforge.net" 
	<e1000-devel@...ts.sourceforge.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [BUG 2.6.30+] e100 sometimes causes oops during resume

On Tue, Sep 29, 2009 at 02:58:11PM +0100, Mel Gorman wrote:
> On Wed, Sep 23, 2009 at 01:35:31AM +0200, Karol Lewandowski wrote:
> > Maybe I should revert following commits (chosen somewhat randomly)?
> > 
> > 1. 49255c619fbd482d704289b5eb2795f8e3b7ff2e
> > 
> > 2. dd5d241ea955006122d76af88af87de73fec25b4 - alters changes made by
> > commit above
> > 
> > Any ideas?
> > 
> 
> Those commits should only make a difference on small-memory machines.
> The exact value of "small" varies but on 32 bit x86 without PAE, it would
> be 20MB of RAM. The fact reverting the two patches makes any difference at
> all is a surprise and likely a co-incidence.
> 
> If you have a reliable reproduction case, would it be possible to bisect
> between the points
> d239171e4f6efd58d7e423853056b1b6a74f1446..b70d94ee438b3fd9c15c7691d7a932a135c18101
> to see if the problem is in there anywhere?

I've started with bc75d33f0 (one commit before d239171e4 in Linus'
tree) but then my system fails to resume.

Whatever I do (change fb/Xorg drivers, disable X, etc.) I always end
up with unusable display and something that looks like hard-locked
system (I haven't tested network connectivity from another box, but
console is surely dead).

Thanks.
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