From mboxrd@z Thu Jan  1 00:00:00 1970
From: Akio Takebe <takebe_akio@jp.fujitsu.com>
Subject: Re: Critical bug: VT-d fault causes disk corruption
	orDom0 kernel panic.
Date: Thu, 22 Jan 2009 18:40:45 +0900
Message-ID: <66C97C757FFC56takebe_akio@jp.fujitsu.com>
References: <C59DEB76.21B5B%keir.fraser@eu.citrix.com>
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To: Keir Fraser <keir.fraser@eu.citrix.com>, "Li, Xin" <xin.li@intel.com>, "Li, Haicheng" <haicheng.li@intel.com>, "'xen-devel@lists.xensource.com'" <xen-devel@lists.xensource.com>
List-Id: xen-devel@lists.xenproject.org

Hi, Keir

Is compute_dom0_nr_pages() OK?
The number of available pages seems to be increase.
What do you think?

Best Regards,

Akio Takebe

>Mmm well not really. :-)
>
>Is there any assumption in the VT-d setup about preventing access to the Xen
>heap, and could that be broken?
>
>Perhaps the VT-d pagetables are broken causing bad DMAs leading to data
>corruption and bad command packets?
>
> -- Keir
>
>On 22/01/2009 08:58, "Li, Xin" <xin.li@intel.com> wrote:
>
>> We are looking into the issue too. If you have any idea on how it's caused,
>> please tell us :-)
>> Thanks!
>> -Xin
>> 
>>> -----Original Message-----
>>> From: xen-devel-bounces@lists.xensource.com
>>> [mailto:xen-devel-bounces@lists.xensource.com] On Behalf Of Keir Fraser
>>> Sent: Thursday, January 22, 2009 3:40 PM
>>> To: Li, Haicheng; 'xen-devel@lists.xensource.com'
>>> Subject: Re: [Xen-devel] Critical bug: VT-d fault causes disk corruption 
>>> or
>>> Dom0
>>> kernel panic.
>>> 
>>> Thanks,
>>> 
>>> I haven't seen any problems outside of VT-d since c/s 19057, btw.
>>> 
>>> -- Keir
>>> 
>>> On 22/01/2009 03:42, "Li, Haicheng" <haicheng.li@intel.com> wrote:
>>> 
>>>> All,
>>>> 
>>>> We met several system failures on different hardware platforms, which are
>>>> all
>>>> caused by VT-d fault.
>>>> err 1: disk is corrupted by VT-d fault on SATA.
>>>> err 2: Dom0 kernel panics at booting, which is caused VT-d fault on UHCI.
>>>> err 3, Dom0 complains disk errors while creating HVM guests.
>>>> 
>>>> The culprit would be changeset 19054 "x86_64: Remove statically-
>>>> partitioned
>>>> Xen heap.".
>>>> 
>>>> Detailed error logs can be found via BZ#,
>>>> http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1409.
>>>> 
>>>> 
>>>> -haicheng
>>>> _______________________________________________
>>>> Xen-devel mailing list
>>>> Xen-devel@lists.xensource.com
>>>> http://lists.xensource.com/xen-devel
>>> 
>>> 
>>> 
>>> _______________________________________________
>>> Xen-devel mailing list
>>> Xen-devel@lists.xensource.com
>>> http://lists.xensource.com/xen-devel
>
>
>
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