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Re: [Xen-devel] [PATCH 4 of 5] libxl: Add support for passing in the mac

To: Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH 4 of 5] libxl: Add support for passing in the machine's E820 for PCI passthrough
From: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Date: Fri, 8 Apr 2011 15:25:36 +0100
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>, "keir.fraser@xxxxxxxxxxxxx" <keir.fraser@xxxxxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
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At 15:17 +0100 on 08 Apr (1302275848), Ian Campbell wrote:
> > That's a _horrible_ config syntax.
> fair enough. I thought it nicely represented the "has an empty PCI bus"
> myself...

Sure, but it's really not obvious that that means "has a memory layout
that matches the host on which it was last booted".

> >   We should either do this for all
> > guests or give it its own option (which can default to 1 for guests with
> > non-empty passthrough lists if you like). 
> Ack, if it's an option it should definitely default to on for non-empty
> pci passthrough lists. I think we can probably get away with default on
> always though and allow it to be explicitly disabled. That's really just
> a case of trying on a few PV OSes and seeing how much they barf...

Agreed.  My guess is there won't be any trouble. 


Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, Xen Platform Team
Citrix Systems UK Ltd.  (Company #02937203, SL9 0BG)

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