linux-kernel - Re: [Bugme-new] [Bug 14003] New: Infinite loop on bootup while handling DMAR

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Message-Id: <1250730929.2742.4.camel@sbs-t61.sc.intel.com>
Date:	Wed, 19 Aug 2009 18:15:28 -0700
From:	Suresh Siddha <suresh.b.siddha@...el.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	"bugzilla-daemon@...zilla.kernel.org" 
	<bugzilla-daemon@...zilla.kernel.org>,
	"bugme-daemon@...zilla.kernel.org" <bugme-daemon@...zilla.kernel.org>,
	"bero@...linux.org" <bero@...linux.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	David Woodhouse <dwmw2@...radead.org>
Subject: Re: [Bugme-new] [Bug 14003] New: Infinite loop on bootup while
 handling DMAR

On Wed, 2009-08-19 at 14:26 -0700, Andrew Morton wrote:
> (switched to email.  Please respond via emailed reply-to-all, not via the
> bugzilla web interface).
> 
> On Tue, 18 Aug 2009 14:54:22 GMT bugzilla-daemon@...zilla.kernel.org wrote:
> 
> > http://bugzilla.kernel.org/show_bug.cgi?id=14003
> > 
> >            Summary: Infinite loop on bootup while handling DMAR
> 
> That's a box-killing post-2.6.30 regression.
> 
> > 
> > Booting 64bit 2.6.31-rc6 on a hp xw4600 results in an infinite loop of
> > 
> > DMAR:[DMA READ] Request device [ff:1f.7] fault addr fffffffffffff000
> > DMAR:[fault reason 255] Unknown

I think David has a fix queued up for this already. Please check
http://git.infradead.org/iommu-2.6.git/commit/0815565a

thanks,
suresh

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