From mboxrd@z Thu Jan  1 00:00:00 1970
From: Olaf Hering <olaf@aepfle.de>
Subject: Re: xl pci-attach silently fails the first time
Date: Wed, 3 Dec 2014 09:36:28 +0100
Message-ID: <20141203083628.GA11508@aepfle.de>
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To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: xen-devel@lists.xen.org
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On Tue, Dec 02, Konrad Rzeszutek Wilk wrote:

> On Tue, Dec 02, 2014 at 04:46:52PM +0100, Olaf Hering wrote:
> > On Mon, Dec 01, Konrad Rzeszutek Wilk wrote:
> > 
> > > That is odd - I see any device 'hot-plugged' being added at 00:05 and further.
> > 
> > Does this by any chance depend on the guest?! I mean, how is the guest
> 
> I doubt it.

Something is different here, likely just the non-pvops guest kernel.

> > notified that a PCI device is gone (by unplug)? Maybe the pvops case
> > just happens to work because the unplug happens early, perhaps before
> > PCI discovery?!
> 
> ACPI hotplug. And it does work after PCI discovery.

In a pvops kernel, is the emulated but unplugged PCI hardware still listed with lspci?

Olaf