linux-kernel - Re: 2.6.29: can't resume from suspend with DMAR (intel iommu) enabled

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Message-ID: <20090411143834.GA14287@kibblesnbits.boston.devel.redhat.com>
Date:	Sat, 11 Apr 2009 10:38:34 -0400
From:	Kyle McMartin <kyle@...hat.com>
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	Matthew Garrett <mjg@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	Andrew Lutomirski <amluto@...il.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Kyle McMartin <kyle@...hat.com>,
	Fenghua Yu <fenghua.yu@...el.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Yinghai Lu <yinghai@...nel.org>,
	Mark Gross <mgross@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.29: can't resume from suspend with DMAR (intel iommu) enabled

On Fri, Apr 10, 2009 at 11:04:12PM -0700, David Woodhouse wrote:
> On Tue, 2009-04-07 at 08:56 +0100, Matthew Garrett wrote:
> > On Mon, Apr 06, 2009 at 01:56:01PM -0700, David Woodhouse wrote:
> > 
> > > Dirk reported the same panic, but we've just turned his iommu back on
> > > and completely failed to reproduce the problem -- so I'm kind of stuck.
> > 
> > I saw this on a T400, but only on the first boot after enabling DMAR - 
> > power cycling "fixed" it.
> 
> OK, that should be fixed (amongst other things) in
> git.infradead.org/users/dwmw2/iommu-suspend-2.6.29.git and in the Fedora
> 2.6.29.1-68.fc11 kernel. Thanks.
> 
> http://www.kerneloops.org/raw.php?rawid=346794
> 

Does this include backporting the interrupt remapping fixes, or just
ignoring it since none of the current laptop chipsets support it?

regards, Kyle
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