linux-kernel - RE: git-latest: kernel oops in IOMMU setup

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Message-ID: <715D42877B251141A38726ABF5CABF2C018E8FECAA@pdsmsx503.ccr.corp.intel.com>
Date:	Fri, 9 Jan 2009 14:53:14 +0800
From:	"Han, Weidong" <weidong.han@...el.com>
To:	'Dirk Hohndel' <hohndel@...radead.org>
CC:	'Grant Grundler' <grundler@...isc-linux.org>,
	"'linux-pci@...r.kernel.org'" <linux-pci@...r.kernel.org>,
	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
	'Jesse Barnes' <jbarnes@...tuousgeek.org>,
	"'iommu@...ts.linux-foundation.org'" 
	<iommu@...ts.linux-foundation.org>, 'Ingo Molnar' <mingo@...e.hu>,
	'Arjan van de Ven' <arjan@...radead.org>
Subject: RE: git-latest: kernel oops in IOMMU setup

Dirk Hohndel wrote:
> On Thu, 8 Jan 2009 18:05:15 -0800
> Dirk Hohndel <hohndel@...radead.org> wrote:
> 
>> On Fri, 9 Jan 2009 08:58:46 +0800 "Han, Weidong"
>> 
>> I updated to Linus' latest git (as your description made me wonder if
>> the async stuff might play a role here). I still get an oops - but at
>> a different spot and the system no longer hangs - it partly recovers
>> (but things aren't too well - for example my USB keyboard / mouse
>> don't work anymore).
> 
> Spoke too soon. Rebooted and had the same hard lockup again. This time
> I had my camera within reach, so here's the trace:
> 
> device_to_iommu+0x33/0x73
> domain_context_mapping_one+0x37/0x335
> domain_context_mapping+0x25/0xa7
> iommu_prepare_identity+0xd7/0xf3
> intel_iommu_init+0x4e4/0x8f3
> ? mutex_lock
> ? sysctl_net_init
> ? pci_iommu_init
> pci_iommu_init
> 
> I also have stack, code and register values. Let me know if you need
> them. Or I can just post the picture :-)
> 
> Again, very latest git tree, VT-d enabled.
> 
> /D

I tried latest git tree, it works for me. Above call trace looks right. 

Regards,
Weidong--
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