linux-kernel - Re: [PATCH] vfio/pci: Support error recovery

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Date:   Tue, 13 Dec 2016 05:15:13 +0200
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Alex Williamson <alex.williamson@...hat.com>
Cc:     Cao jin <caoj.fnst@...fujitsu.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, izumi.taku@...fujitsu.com
Subject: Re: [PATCH] vfio/pci: Support error recovery

On Mon, Dec 12, 2016 at 03:43:13PM -0700, Alex Williamson wrote:
> > So just don't do it then. Topology must match between host and guest,
> > except maybe for the case of devices with host driver  (e.g. PF)
> > which we might be able to synchronize against.
> 
> We're talking about host kernel level handling here.  The host kernel
> cannot defer the link reset to the user under the assumption that the
> user is handling the devices in a very specific way.  The moment we do
> that, we've lost.

The way is same as baremetal though, so why not?

And if user doesn't do what's expected, we can
do the full link reset on close.

-- 
MST