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Subject: Re: [PATCHv2 3/4] pci: Determine actual VPD size on first access
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: "Rustad, Mark D" <mark.d.rustad@intel.com>
Cc: Alex Williamson <alex.williamson@redhat.com>,
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Date: Tue, 16 Aug 2016 08:23:19 +1000
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On Mon, 2016-08-15 at 17:59 +0000, Rustad, Mark D wrote:
> > Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
> 
> > 
> > We may want some kind of "strict" vs. "relaxed" model here to
> > differenciate the desktop user wanting to give a function to his/her
> > windows partition and doesn't care about strict isolation vs. the cloud
> > data center.
> 
> I don't think desktop users appreciate hangs any more than anyone else, and  
> that is one of the symptoms that can arise here without the vfio  
> coordination.

And can happen with it as well.... 

Put it this way, we have a hole the size of a football field and we are
spending all that time "plugging" it by putting a 3 foot gate in the
middle of it... ugh.

VFIO shouldn't try to get between the device driver and the HW, it doesn't
work. It cannot work.

Cheers,
Ben.