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Message-ID: <1471299799.12231.121.camel@kernel.crashing.org> Date: Tue, 16 Aug 2016 08:23:19 +1000 From: Benjamin Herrenschmidt <benh@...nel.crashing.org> To: "Rustad, Mark D" <mark.d.rustad@...el.com> Cc: Alex Williamson <alex.williamson@...hat.com>, Alexander Duyck <alexander.duyck@...il.com>, Alexey Kardashevskiy <aik@...abs.ru>, Bjorn Helgaas <helgaas@...nel.org>, Hannes Reinecke <hare@...e.de>, "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Babu Moger <babu.moger@...cle.com>, Paul Mackerras <paulus@...ba.org>, "santosh@...lsio.com" <santosh@...lsio.com>, Netdev <netdev@...r.kernel.org> Subject: Re: [PATCHv2 3/4] pci: Determine actual VPD size on first access On Mon, 2016-08-15 at 17:59 +0000, Rustad, Mark D wrote: > > Benjamin Herrenschmidt <benh@...nel.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.
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