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

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Date:	Sat, 11 Apr 2009 13:14:18 -0400
From:	Kyle McMartin <kyle@...hat.com>
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	Kyle McMartin <kyle@...hat.com>, Matthew Garrett <mjg@...hat.com>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Lutomirski <amluto@...il.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	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 Sat, Apr 11, 2009 at 09:52:39AM -0700, David Woodhouse wrote:
> > Does this include backporting the interrupt remapping fixes, or just
> > ignoring it since none of the current laptop chipsets support it?
> 
> The latter. What I've done so far is quite large for a -stable
> submission already. The interrupt remapping stuff would be even more
> intrusive, and I'm entirely unconvinced that we actually _need_ it for
> current systems.
> 
> I could make it refuse to suspend in intr_remap is enabled, I suppose --
> that would be simple enough.
>

Right, that's what I was afraid of. I think refusing to suspend is probably
a good idea. I'm probably not the only person who suspends his desktop
machines when they're not in use...

regards, Kyle
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