Date: Mon, 15 Dec 2008 03:21:07 +0900
To: bugme-daemon@bugzilla.kernel.org
Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
       dwmw2@infradead.org
Subject: Re: [Bug 12222] New: kernel BUG at drivers/pci/intel-iommu.c:1373!
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
In-Reply-To: <bug-12222-11613@http.bugzilla.kernel.org/>
References: <bug-12222-11613@http.bugzilla.kernel.org/>
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On Sun, 14 Dec 2008 09:35:38 -0800 (PST)
bugme-daemon@bugzilla.kernel.org wrote:

> http://bugzilla.kernel.org/show_bug.cgi?id=12222
> 
>            Summary: kernel BUG at drivers/pci/intel-iommu.c:1373!
>            Product: IO/Storage
>            Version: 2.5
>      KernelVersion: 2.6.26-gentoo-r4
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: SCSI
>         AssignedTo: linux-scsi@vger.kernel.org
>         ReportedBy: john.blbec@centrum.cz
>                 CC: anil.s.keshavamurthy@intel.com
> 
> 
> Latest working kernel version: unknown

Probably, this is a VT-d bug. I saw the same bug report before:

http://lkml.org/lkml/2008/9/8/138

it's worth trying the latest kernel but I guess that the problem still
exists.

As Mark suggested, it's also worth trying 'intel_iommu=strict' kernel
boot option, I think. If it doesn't work, you can use a workaround to
disable VT-d with 'intel_iommu=off' kernel boot option.
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