Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757500AbZDKQxg (ORCPT ); Sat, 11 Apr 2009 12:53:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753280AbZDKQx1 (ORCPT ); Sat, 11 Apr 2009 12:53:27 -0400 Received: from casper.infradead.org ([85.118.1.10]:39124 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752926AbZDKQx0 (ORCPT ); Sat, 11 Apr 2009 12:53:26 -0400 Subject: Re: 2.6.29: can't resume from suspend with DMAR (intel iommu) enabled From: David Woodhouse To: Kyle McMartin Cc: Matthew Garrett , Ingo Molnar , Andrew Lutomirski , Jesse Barnes , Fenghua Yu , Suresh Siddha , Yinghai Lu , Mark Gross , LKML In-Reply-To: <20090411143834.GA14287@kibblesnbits.boston.devel.redhat.com> References: <20090324203259.GC26930@elte.hu> <1238003581.2085.53.camel@macbook.infradead.org> <20090325175908.GA25518@elte.hu> <1239051362.22733.87.camel@macbook.infradead.org> <20090407075640.GA16516@srcf.ucam.org> <1239429852.712.1532.camel@macbook.infradead.org> <20090411143834.GA14287@kibblesnbits.boston.devel.redhat.com> Content-Type: text/plain Date: Sat, 11 Apr 2009 09:52:39 -0700 Message-Id: <1239468764.712.1546.camel@macbook.infradead.org> Mime-Version: 1.0 X-Mailer: Evolution 2.26.0 (2.26.0-2.fc11) Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1636 Lines: 38 On Sat, 2009-04-11 at 10:38 -0400, Kyle McMartin wrote: > 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? 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. -- David Woodhouse Open Source Technology Centre David.Woodhouse@intel.com Intel Corporation -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/