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Re: [Xen-devel] [Pkg-xen-devel] ioatdma: Boot process hangs then reboots when using Xen + Linux 3.2

On Thu, Mar 01, 2012 at 10:42:44PM -0800, Dan Williams wrote:
> WARN_ON may work, but then kernel may be subject random hangs from missed
> i/o completions.

Why is that? Currently it just dies if was triggered via interrupt and
for some reason no active descriptor was found.

>                   Is xen32 using vt-d?

Yes. Xen can use VT-D.

>                                         Just wondering if writes from ioat
> device are getting misdirected.

How do VT-D and ioat interact?


Too much of anything, even love, isn't necessarily a good thing.
                -- Kirk, "The Trouble with Tribbles", stardate 4525.6

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